ORCID Profile
0000-0002-8409-5638
Current Organisation
RMIT University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Electrical and Electronic Engineering | Photonics and Electro-Optical Engineering (excl. Communications) | Optical Physics | Microelectronics and Integrated Circuits | Photonics, Optoelectronics and Optical Communications | Optical Fibre Communications | Signal Processing | Nanotechnology | Optical And Photonic Systems | Fluidization And Fluid Mechanics | Wireless Communications | Optical Physics Not Elsewhere Classified | Communications Technologies | Integrated Circuits | Photonic and electro-optical devices sensors and systems (excl. communications) | Electronics sensors and digital hardware | Quantum Information, Computation and Communication | Optical fibre communication systems and technologies | Optics And Opto-Electronic Physics |
ANZSRC Socio-Economic Objective (SEO)
Communication Networks and Services not elsewhere classified | Integrated circuits and devices | Physical sciences | Scientific instrumentation | Expanding Knowledge in Technology | Clinical health not specific to particular organs, diseases and conditions | Expanding Knowledge in Engineering | Network Infrastructure Equipment | Scientific Instruments | Integrated Circuits and Devices | Communication equipment not elsewhere classified
Related Links
Publications
Broadband Local Oscillator Free Photonic Microwave Mixer based on a Coherent Kerr Micro-Comb Source
Publisher: OSA
Date: 2019
Orthogonally Polarized RF Optical Single Sideband Generation and Dual-Channel Equalization Based on an Integrated Microring Resonator
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-10-2018
Towards on-chip photon-pair bell tests: Spatial pump filtering in a LiNbO3 adiabatic coupler
Publisher: AIP Publishing
Date: 25-12-2017
DOI: 10.1063/1.5008445
Abstract: Nonlinear optical waveguides enable the integration of entangled photon sources and quantum logic gates on a quantum photonic chip. One of the major challenges in such systems is separating the generated entangled photons from the pump laser light. In this work, we experimentally characterize double-N-shaped nonlinear optical adiabatic couplers designed for the generation of spatially entangled photon pairs through spontaneous parametric down-conversion, while simultaneously providing spatial pump filtering and keeping photon-pair states pure. We observe that the pump photons at a wavelength of 671 nm mostly remain in the central waveguide, achieving a filtering ratio of over 20 dB at the outer waveguides. We also perform classical characterization at the photon-pair wavelength of 1342 nm and observe that light fully couples from an input central waveguide to the outer waveguides, showing on chip separation of the pump and the photon-pair wavelength.
On-Chip Backward Inter-modal Brillouin Scattering
Publisher: OSA
Date: 2019
Quantitative Analysis of TM Lateral Leakage in Foundry Fabricated Silicon Rib Waveguides
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-02-2016
On-chip switchable and reconfigurable optical mode exchange device using cascaded three-waveguide-coupling switches
Publisher: Optica Publishing Group
Date: 18-03-2020
DOI: 10.1364/OE.390164
Abstract: Data exchange between different data channels can offer more flexible and advanced functions for many optical networks. In this paper, we propose a switchable and reconfigurable data exchange device for arbitrary two optical mode channels based on three-waveguide-coupling (TWC) switches in mode- ision multiplexing (MDM) networks. The working principle of the TWC switches is numerically analyzed using the coupled supermode theory. As a proof of concept, switchable data exchange between arbitrary two mode channels among the first three-order quasi-transverse electric modes is experimentally demonstrated successfully. The insertion losses of the device are less than 5.6 dB, including the coupling loss of the multiplexer and demultiplexer, while the mode crosstalk is less than -13.0 dB for all functions. The proposed device is expected to offer more flexibility to on-chip MDM networks due to its low loss, low crosstalk and good scalability.
Gaussian Beams on a Silicon-on-Insulator Chip Using Integrated Optical Lenses
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-07-2014
Integrated photonic high extinction short and long pass filters based on lateral leakage
Publisher: Optica Publishing Group
Date: 02-06-2021
DOI: 10.1364/OE.426442
Abstract: In this contribution we present a new approach to achieve high extinction short and long pass wavelength filters in the integrated photonic platform of lithium niobate on insulator. The filtering of unwanted wavelengths is achieved by employing lateral leakage and is related to the bound state in the continuum phenomenon. We show that it is possible to control the filter edge wavelength by adjusting the waveguide dimensions and that an extinction of hundreds of dB/cm is readily achievable. This enabled us to design a pump wavelength suppression of more than 100 dB in a 3.5 mm long waveguide, which is essential for on-chip integration of quantum-correlated photon pair sources. These findings pave the way to integrate multi wavelength experiments on chip for the next generation of photonic integrated circuits.
Reconfigurable fractional microwave signal processor based on a microcomb
Publisher: IEEE
Date: 10-2019
Optical frequency comb generation using low stress CMOS compatible reactive sputtered silicon nitride waveguides
Publisher: SPIE
Date: 02-04-2020
DOI: 10.1117/12.2564640
Microwave and RF Photonic Fractional Hilbert Transformer Based on a 50 GHz Kerr Micro-Comb
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-12-2019
Single perceptron at 12 GigaOPs based on a microcomb for versatile, high-speed scalable, optical neural networks
Publisher: SPIE
Date: 05-03-2021
DOI: 10.1117/12.2584011
Tunable Photonic RF Bandpass Filters based on an 80 Channel Kerr Micro-Comb Source
Publisher: OSA
Date: 2019
Broadband Photonic RF Channelizer With 92 Channels Based on a Soliton Crystal Microcomb
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-09-2020
High-speed electro-optic modulator based on silicon nitride loaded lithium niobate on an insulator platform
Publisher: Optica Publishing Group
Date: 29-11-2021
DOI: 10.1364/OL.446222
Abstract: Electro-optic (EO) modulators, which convert signals from the electrical to optical domain plays a key role in modern optical communication systems. Lithium niobate on insulator (LNOI) technology has emerged as a competitive solution to realize high-performance integrated EO modulators. In this Letter, we design and experimentally demonstrate a Mach–Zehnder interferometer-based modulator on a silicon nitride loaded LNOI platform, which not only takes full advantage of the excellent EO effect of L i N b O 3 , but also avoids the direct etching of L i N b O 3 thin film. The measured half-wave voltage length product of the fabricated modulator is 2.24 V·cm, and the extinction ratio is ∼ 20 d B . Moreover, the 3 dB EO bandwidth is ∼ 30 G H z , while the modulated data rate for on–off key signals can reach up to 80 Gbps.
Efficient second harmonic generation in lithium niobate on insulator waveguides and its pitfalls
Publisher: IOP Publishing
Date: 2021
Abstract: In this contribution, we investigate second harmonic generation (SHG) in periodically poled lithium niobate (LN) on insulator waveguides and examine under what conditions such waveguides suffer from undesirable loss due to lateral leakage. We investigate the lateral leakage losses in X-cut and Z-cut LN for the fundamental (1550 nm) and second harmonic (775 nm) wavelengths. Our findings show that Z-cut lithium niobate on insulator (LNOI) is more likely to suffer from lateral leakage and has a lower SHG efficiency. We further provide design guidelines for highly efficient nonlinear optical waveguides in LNOI and show how lateral leakage can be avoided.
True time delays for phased array antennas based on a microcomb
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2540414
Integrated lithium niobate optical mode (de)interleaver based on an asymmetric Y-junction
Publisher: Optica Publishing Group
Date: 09-2023
DOI: 10.1364/OL.500232
Integrated frequency comb source based Hilbert transformer for wideband microwave photonic phase analysis
Publisher: The Optical Society
Date: 13-08-2015
DOI: 10.1364/OE.23.022087
Highly Versatile Broadband RF Photonic Fractional Hilbert Transformer Based on a Kerr Soliton Crystal Microcomb
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-12-2021
Optical intensity square root differentiator based on an integrated Kerr frequency comb source
Publisher: OSA
Date: 2017
Brillouin spectroscopy of a hybrid silicon-chalcogenide waveguide with geometrical variations
Publisher: The Optical Society
Date: 17-07-2018
DOI: 10.1364/OL.43.003493
Advanced Adaptive Photonic RF Filters with 80 Taps Based on an Integrated Optical Micro-Comb Source
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-02-2019
Adiabatic two-photon quantum gate operations using a long-range photonic bus
Publisher: IOP Publishing
Date: 04-02-2015
Asymmetric transmission of light in hybrid waveguide-integrated plasmonic crystals on a silicon-on-insulator platform
Publisher: The Optical Society
Date: 31-10-2019
DOI: 10.1364/OL.44.005378
Microwave and Communications Applications of Microcombs
Publisher: OSA
Date: 2019
Lateral leakage in TM-like whispering gallery mode of thin-ridge silicon-on-insulator disk resonators
Publisher: Optica Publishing Group
Date: 20-03-2009
DOI: 10.1364/OL.34.000980
Abstract: The leakage loss due to TM-TE mode coupling of TM-like whispering gallery mode in silicon-on-insulator (SOI) thin-ridge disk resonators is investigated for the first time to the best of our knowledge. We show that the propagation losses of TM-like mode in thin-ridge SOI disk resonators are significantly impacted by the radius of the disk. This behavior is predicted by a simple phenomenological model as well as a rigorous mode matching simulation.
Experimental demonstration of bidirectional light transfer in adiabatic waveguide structures
Publisher: The Optical Society
Date: 10-11-2016
DOI: 10.1364/OL.41.005278
Circulator‐Free Brillouin Photonic Planar Circuit
Publisher: Wiley
Date: 18-03-2021
Integrated Kerr Comb-based Reconfigurable Transversal Differentiator for Microwave Photonic Signal Processing
Publisher: OSA
Date: 2017
Cascaded multicavity resonantly enhanced Mach-Zehnder modulator
Publisher: IEEE
Date: 07-2006
Photonic RF Phase-Encoded Signal Generation With a Microcomb Source
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2020
High extinction on-chip long pass filters in LNOI towards quantum optical applications
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C3C_4
Abstract: We present a design for compact and efficient spectral filters with an extinction ratio of ~190 dB/cm in lithium niobate on insulator, which are essential for the on-chip integration of quantum-correlated photon pair sources.
Rigorous Modeling of Lateral Leakage Loss in SOI Thin-Ridge Waveguides and Couplers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2009
Silicon nitride integrated photonic platform at 780 nm wavelength
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C3C_3
Abstract: Silicon nitride (Si 3 N4) waveguides and microring resonators were designed and fabricated for operation at a wavelength of 780 nm, reporting a loss of 11 dB/cm and Q value of 5×10 4 .
Reconfigurable microwave photonic transversal filter based on an integrated optical micro-comb source
Publisher: SPIE
Date: 04-03-2019
DOI: 10.1117/12.2508152
Electrically tuneable lateral leakage loss in liquid crystal clad shallow-etched silicon waveguides
Publisher: The Optical Society
Date: 30-01-2015
DOI: 10.1364/OE.23.002846
Fluid tunable transition from trapping to discrete diffraction in waveguide arrays
Publisher: The Optical Society
Date: 22-07-2013
DOI: 10.1364/OE.21.018196
Integrated photonics on the dielectrically loaded lithium niobate on insulator platform
Publisher: Optica Publishing Group
Date: 10-03-2023
DOI: 10.1364/JOSAB.482507
Abstract: Thin-film lithium niobate on insulator (LNOI) is emerging as one of the promising platforms for integrated photonics due to the excellent material properties of lithium niobate, which includes a strong electro-optic effect, high second-order optical nonlinearity, a large optical transparency window, and low material loss. Although direct etching of lithium niobate has been adopted more widely in recent years, it remains to be seen if it will be adopted in foundry processes due to the incompatibility with standard CMOS fabrication processes. Thus, the scalability of the LNOI platform is currently still limited when compared with other platforms such as silicon photonics. Dielectrically loaded LNOI waveguides may present an alternative. These waveguides have been used to demonstrate a range of optical components with a simplified fabrication process while demonstrating competitive performance. In this contribution, we review the recent progress in dielectrically loaded LNOI waveguides, summarize the advantages and disadvantages of different loading materials, compare the performance of different platforms, and discuss the future of these platforms for photonic integrated circuits.
Optical frequency comb generation using low stress reactive sputtered silicon nitride waveguides
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEO_AT.2020.JTH2F.17
Abstract: We demonstrate fully CMOS-compatible anomalous dispersive SiN microring resonators with an intrinsic Q factor of 6.6 × 10 5 based on reactive sputtering SiN, yielding in a 250 nm wide modulation-instability frequency comb.
Low-cost RF Frequency Measurement using Photonic Approach
Publisher: IEEE
Date: 06-2007
Lateral leakage of TM-like mode in thin-ridge Silicon-on-Insulator bent waveguides and ring resonators
Publisher: Optica Publishing Group
Date: 24-03-2010
DOI: 10.1364/OE.18.007243
Broadband RF Channelizer Based on an Integrated Optical Frequency Kerr Comb Source
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2018
Reconfigurable microwave signal processor for fractional and regular Hilbert transform based on a microcomb
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2540404
Mode and Polarization‐Division Multiplexing Based on Silicon Nitride Loaded Lithium Niobate on Insulator Platform
Publisher: Wiley
Date: 10-12-2021
Abstract: Mode and polarization‐ ision multiplexing technologies (MDM and PDM) can offer considerable parallelism for optical multiplexing biosensors, complex optical neural networks, and high‐capacity optical interconnects, while requiring only a single‐wavelength laser source. Thanks to the mature fabrication processes of silicon nitride and superior material properties of lithium niobate, the silicon nitride loaded lithium niobate on insulator (LNOI) platform allows the integration of high‐speed optical modulators and optical (de)multiplexing devices to achieve high‐capacity and low‐cost photonic integrated circuits suitable for data communication applications. In this contribution, MDM and PDM are investigated in a silicon nitride loaded LNOI (X‐cut) platform. As a proof of concept, an asymmetrical directional coupler‐based mode (de)multiplexer (MMUX) and polarization splitter‐rotator (PSR) are designed, fabricated, and experimentally demonstrated. The measured insertion losses are lower than 1.46 and 1.49 dB, while the inter‐modal crosstalk is lower than −13.03 and −17.75 dB for the MMUX and PSR, respectively, for a wavelength range of 1525–1565 nm. A 40 Gbps data transmission experiment demonstrates the data transmission capabilities of the fabricated devices. The measured eye diagrams are clear and wide‐open, and the bit error rate measurements show reasonable power penalties, indicating good device performance.
Reconfigurable broadband microwave photonic intensity differentiator based on an integrated optical frequency comb source
Publisher: AIP Publishing
Date: 09-2017
DOI: 10.1063/1.4989871
Abstract: We propose and experimentally demonstrate a microwave photonic intensity differentiator based on a Kerr optical comb generated by a compact integrated micro-ring resonator (MRR). The on-chip Kerr optical comb, containing a large number of comb lines, serves as a high-performance multi-wavelength source for implementing a transversal filter, which will greatly reduce the cost, size, and complexity of the system. Moreover, owing to the compactness of the integrated MRR, frequency spacings of up to 200-GHz can be achieved, enabling a potential operation bandwidth of over 100 GHz. By programming and shaping in idual comb lines according to calculated tap weights, a reconfigurable intensity differentiator with variable differentiation orders can be realized. The operation principle is theoretically analyzed, and experimental demonstrations of the first-, second-, and third-order differentiation functions based on this principle are presented. The radio frequency litude and phase responses of multi-order intensity differentiations are characterized, and system demonstrations of real-time differentiations for a Gaussian input signal are also performed. The experimental results show good agreement with theory, confirming the effectiveness of our approach.
Systematic design approach for optimized resonantly enhanced Mach-zehnder Modulators
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2006
Photonic and plasmonic waveguide sensors
Publisher: SPIE
Date: 21-12-2011
DOI: 10.1117/12.904802
Ridge waveguide couplers with leaky mode resonator-like wavelength responses
Publisher: Optica Publishing Group
Date: 23-12-2023
DOI: 10.1364/OE.473131
Abstract: Integrated photonic resonators based on bound states in the continuum (BICs) on the silicon-on-insulator (SOI) platform have the potential for novel, mass-manufacturable resonant devices. While the nature of BIC-based ridge resonators requires the resonators to be extended in the (axial) propagation direction of the resonant mode, the requirement for excitation from the quasi-continuum extends the resonator structures also in the lateral dimensions, resulting in large device footprints. To overcome this footprint requirement, we investigate the translation of BIC-based ridge resonators into a guided mode system with finite lateral dimensions. We draw analogies between the resulting waveguide system and the BIC-based resonators and numerically demonstrate that, analog to the BIC-based resonators, such a waveguide system can exhibit spectrally narrow-band inversion of its transmissive behavior.
Photonic microwave and RF channelizers based on Kerr micro-combs
Publisher: SPIE
Date: 05-03-0030
DOI: 10.1117/12.2584015
High performance RF filters via bandwidth scaling with Kerr micro-combs
Publisher: AIP Publishing
Date: 02-2019
DOI: 10.1063/1.5080246
Interrogation of photonic biosensors using dual optical frequency combs
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.P3_13
Abstract: Dual frequency combs are used to extract a linear phase response of interferometric biosensors while being independent of the bias point and offering common-mode rejection and low noise.
Optical data transmission at 44 terabits/s with a Kerr soliton crystal microcomb
Publisher: SPIE
Date: 05-03-2021
DOI: 10.1117/12.2584014
Ridge Resonance in Silicon Photonics Harnessing Bound States in the Continuum
Publisher: Wiley
Date: 10-09-2019
Microcombs for ultrahigh bandwidth optical data transmission and neural networks
Publisher: SPIE
Date: 18-04-2021
DOI: 10.1117/12.2588733
Photonic convolutional accelerator and neural network in the Tera-OPs regime based on Kerr microcombs
Publisher: SPIE
Date: 05-03-2021
DOI: 10.1117/12.2584017
High-performance microwave photonic true time delays based on an integrated optical micro-comb source
Publisher: SPIE
Date: 04-03-2019
DOI: 10.1117/12.2508146
Photonic wideband RF mixer based on an integrated microcomb source
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2541201
Monolithic Photonic Integrated Circuit Based on Silicon Nitride and Lithium Niobate on Insulator Hybrid Platform
Publisher: Wiley
Date: 07-07-2022
Abstract: Lithium niobate on insulator (LNOI) has been demonstrated as a promising platform for photonic integrated circuits (PICs), thanks to its excellent properties such as strong electro‐optic effect, low material loss, and wide transparency window. Herein, a monolithic PIC for high‐speed data communication application on a lithium‐niobate‐etchless platform with silicon nitride (Si 3 N 4 ) as a loading material is proposed and demonstrated. The fabricated PIC consists of four racetrack resonator modulators and a pair of four‐channel mode (de)multiplexers, which shows high data modulation rate of 70 Gbps for single channel and the total data throughput reaches up to 280 Gbps. To the best of knowledge, this is the first demonstration of PIC consisting of high‐speed electro‐optical modulators and (de)multiplexers with such high data capacity on Si 3 N 4 ‐LNOI hybrid platform, which opens up new avenues for achieving large‐scale monolithic integration on LNOI platform in future.
High Q RF transversal filter based on an 80-channel integrated microcomb source
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2541202
Applications of Kerr Micro-combs to RF Photonics
Publisher: OSA
Date: 2019
Microcomb-based RF transversal filters
Publisher: OSA
Date: 2019
Photonic microwave true time delays for phased array antennas using a 49 GHz FSR integrated optical micro-comb source [Invited]
Publisher: The Optical Society
Date: 12-04-2018
DOI: 10.1364/PRJ.6.000B30
Net Brillouin gain of 18.5 dB in a hybrid silicon chip
Publisher: OSA
Date: 2014
Photonic RF and Microwave Integrator Based on a Transversal Filter With Soliton Crystal Microcombs
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2020
Arbitrary access to optical carriers in silicon photonic mode/wavelength hybrid division multiplexing circuits
Publisher: Optica Publishing Group
Date: 11-07-2022
DOI: 10.1364/OL.463445
Abstract: The manipulation of optical modes directly in a multimode waveguide without affecting the transmission of undesired signal carriers is of significance to realize a flexible and simple structured optical network-on-chip. In this Letter, an arbitrary optical mode and wavelength carrier access scheme is proposed based on a series of multimode microring resonators and one multimode bus waveguide with constant width. As a proof-of-concept, a three-mode (de)multiplexing device is designed, fabricated, and experimentally demonstrated. A new, to the best of our knowledge, phase-matching idea is employed to keep the bus waveguide width constant. The mode coupling regions and transmission regions of the microring resonators are designed carefully to selectively couple and transmit different optical modes. The extinction ratio of the microring resonators is larger than 21.0 dB. The mode and wavelength cross-talk for directly (de)multiplexing are less than −12.8 dB and −19.0 dB, respectively. It would be a good candidate for future large-scale multidimensional optical networks.
Investigation of Resonantly Enhanced Modulators on<tex>$hboxLiNbO_3$</tex>Using FEM and Numerical Optimization Technique
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2004
Thin-ridge Silicon-on-Insulator waveguides with directional control of lateral leakage radiation
Publisher: The Optical Society
Date: 11-03-2011
DOI: 10.1364/OE.19.005635
Broadband photonic RF channelization based on an integrated optical micro-comb source
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2540360
Experimental demonstration of two-dimensional hybrid waveguide-integrated plasmonic crystals on silicon-on-insulator platform
Publisher: AIP Publishing
Date: 07-2017
DOI: 10.1063/1.4995996
Abstract: Nanoscale plasmonic structures can offer unique functionality due to extreme sub-wavelength optical confinement, but the realization of complex plasmonic circuits is h ered by high propagation losses. Hybrid approaches can potentially overcome this limitation, but only few practical approaches based on either single or few element arrays of nanoantennas on dielectric nanowire have been experimentally demonstrated. In this paper, we demonstrate a two dimensional hybrid photonic plasmonic crystal interfaced with a standard silicon photonic platform. Off resonance, we observe low loss propagation through our structure, while on resonance we observe strong propagation suppression and intense concentration of light into a dense lattice of nanoscale hot-spots on the surface providing clear evidence of a hybrid photonic plasmonic crystal bandgap. This fully integrated approach is compatible with established silicon-on-insulator (SOI) fabrication techniques and constitutes a significant step toward harnessing plasmonic functionality within SOI photonic circuits.
On-chip collimated planar ‘Free Space’ Gaussian beams utilising optical lenses on a silicon on insulator chip
Publisher: IEEE
Date: 05-2013
Ridge resonators with compact guided mode coupling
Publisher: Optica Publishing Group
Date: 27-09-2023
DOI: 10.1364/OE.498428
Sensitivity analysis of process variations for resonantly enhanced modulators on LiNbO/sub 3/
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2006
Optical frequency comb generation with low temperature reactive sputtered silicon nitride waveguides
Publisher: AIP Publishing
Date: 2020
DOI: 10.1063/1.5136270
Abstract: Integrated silicon nitride (SiN) waveguides with anomalous dispersion have the potential to bring practical nonlinear optics to mainstream photonic integrated circuits. However, high-stress and high-processing temperatures remain an obstacle to mass adoption. We report low-stress, high-confinement, dispersion-engineered SiN waveguides utilizing low temperature grown reactive sputtered thin-films. We demonstrate a microring resonator with an intrinsic quality factor of 6.6 × 105, which enabled us to generate a native free spectral range spaced frequency comb with an estimated on-chip pump power of 850 mW. Importantly, the peak processing temperature is 400 °C making this approach fully back-end compatible for hybrid integration with preprocessed CMOS substrates and temperature sensitive photonic platforms such as lithium niobate on insulator.
Single-step etched grating couplers for silicon nitride loaded lithium niobate on insulator platform
Publisher: AIP Publishing
Date: 08-2021
DOI: 10.1063/5.0055213
Analysis of optical waveguides with multilayer dielectric coatings using plane wave expansion
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2006
Monolithic photonic integrated circuit based on silicon nitride and lithium niobate on insulator hybrid platform
Publisher: Research Square Platform LLC
Date: 06-04-2022
DOI: 10.21203/RS.3.RS-1486220/V1
Abstract: Lithium niobate on insulator (LNOI) has been demonstrated as a promising platform for photonic integrated circuits (PICs), thanks to its excellent properties such as strong electro-optic effect, low material loss and wide transparency window. In this paper, we propose and demonstrate a monolithic PIC for high-speed data communication application on a lithium-niobate-etchless platform with silicon nitride (Si3N4) as a loading material. The fabricated PIC consists of four racetrack resonator modulators and a pair of four-channel mode (de)multiplexers, which shows high data modulation rate of 70 Gbps for single channel and the total data throughput reaches up to 280 Gbps. To the best of our knowledge, this is the first demonstration of PIC consisting of high-speed electro-optical modulators and (de)multiplexers with such high data capacity on Si3N4-LNOI hybrid platform, which opens up new avenues for achieving large-scale monolithic integration on LNOI platform in future.
11 TOPS photonic convolutional accelerator for optical neural networks
Publisher: Springer Science and Business Media LLC
Date: 06-01-2202
Adiabatic optical bus for long-range coupling between silicon photonic waveguides
Publisher: SPIE
Date: 05-2014
DOI: 10.1117/12.2050118
Integrated Kerr comb-based reconfigurable transversal differentiator for microwave photonic signal processing
Publisher: SPIE
Date: 02-01-2018
DOI: 10.1117/12.2282642
Reconfigurable microwave photonic transversal filter based on an integrated Kerr comb
Publisher: SPIE
Date: 02-01-2018
DOI: 10.1117/12.2283456
Design algorithm for adiabatic photonic components using a constant coupling approach
Publisher: IEEE
Date: 06-2019
New Resonance Behavior Based on Bound States in the Continuum in a Silicon Photonic Waveguide Platform
Publisher: OSA
Date: 2019
Integration of Brillouin and passive circuits for enhanced radio-frequency photonic filtering
Publisher: AIP Publishing
Date: 10-2019
DOI: 10.1063/1.5113569
Abstract: Signal processing using on-chip nonlinear or linear optical effects has shown tremendous potential for RF photonic applications. Combining nonlinear and linear elements on the same photonic chip can further enable advanced functionality and enhanced system performance in a robust and compact form. However, the integration of nonlinear and linear optical signal processing units remains challenging due to the competing and demanding waveguide requirements, specifically the combination of high optical nonlinearity in single-pass waveguides, which is desirable for broadband signal processing with low linear loss and negligible nonlinear distortions required for linear signal processing. Here, we report the first demonstration of integrating Brillouin-active waveguides and passive ring resonators on the same integrated photonic chip, enabling an integrated microwave photonic notch filter with ultradeep stopband suppressions of & dB, a low filter passband loss of & −10 dB, flexible center frequency tuning over 15 GHz, and reconfigurable filter shape. This demonstration paves the way for implementing high-performance integrated photonic processing systems that merge complementary linear and nonlinear properties, for advanced functionality, enhanced performance, and compactness.
Reconfigurable photonic RF filters based on integrated Kerr frequency comb sources
Publisher: IEEE
Date: 10-2019
Neuromorphic processing at 11 Tera-OPs with soliton crystal Kerr microcombs
Publisher: IEEE
Date: 07-2021
Micro-Resonator Frequency Comb Source based Time Domain Hilbert Transform
Publisher: OSA
Date: 2016
Digital waveguide adiabatic passage part 2: experiment
Publisher: The Optical Society
Date: 02-2017
DOI: 10.1364/OE.25.002552
Active control of lateral leakage in thin-ridge SOI waveguide structures
Publisher: SPIE
Date: 21-12-2011
DOI: 10.1117/12.904901
Microwave and RF applications for micro-resonator based frequency combs
Publisher: SPIE
Date: 03-2016
DOI: 10.1117/12.2218883
Experimental demonstration of TM lateral leakage in a standard SOI photonics platform
Publisher: IEEE
Date: 08-2014
Long-range coupling of silicon photonic waveguides using lateral leakage and adiabatic passage
Publisher: The Optical Society
Date: 19-09-2013
DOI: 10.1364/OE.21.022705
Reconfigurable microwave photonic differentiator based on an integrated Kerr frequency comb source
Publisher: IEEE
Date: 07-2017
Toward experimental realization of hybrid waveguide-integrated plasmonic crystals on silicon-on-insulator platform
Publisher: IEEE
Date: 08-2014
Broadband RF channelization using microcombs
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C7F_4
Abstract: We demonstrate RF channelizers based on 49GHz microcombs. 92 parallel channels and an instantaneous bandwidth of 8.08GHz are achieved for high-resolution RF spectral channelization. This approach is promising for integrated photonic RF receivers.
Elastomer-based pneumatic switch for radio frequency microdevices
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2012
Continuously tunable orthogonally polarized RF optical single sideband generator based on micro-ring resonators
Publisher: IOP Publishing
Date: 16-10-2018
Optical frequency comb generation using low stress reactive sputtered silicon nitride waveguides
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C2C_3
Abstract: We demonstrate fully CMOS-compatible anomalous dispersive SiN microring resonators with an intrinsic Q factor of 6.6 x 10 5 based on reactive sputtering SiN, yielding in a 250 nm wide modulation-instability frequency comb.
Improved second harmonic performance in periodically poled LNOI waveguides through engineering of lateral leakage
Publisher: The Optical Society
Date: 06-08-2019
DOI: 10.1364/OE.27.023919
Microwave engineering filter synthesis technique for coupled ridge resonator filters
Publisher: The Optical Society
Date: 07-11-2019
DOI: 10.1364/OE.27.034370
Electro-optical tuning of phase matching wavelength in Lithium Niobate on Insulator (LNOI)
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C4B_3
Abstract: In this contribution, we present electro-optically tuneable quasi-phase matching in a periodically poled lithium niobate on insulator waveguide and experimentally demonstrate a tuning efficiency of 56 pm/100 V.
Mid-infrared supercontinuum generation in a varying dispersion waveguide for multi-species gas spectroscopy
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Broadband photonic RF channelizer based on micro-combs
Publisher: SPIE
Date: 03-2019
DOI: 10.1117/12.2506942
On-chip biochemical sensor using wide Gaussian beams in silicon waveguide-integrated plasmonic crystal
Publisher: Optica Publishing Group
Date: 09-04-2020
DOI: 10.1364/OL.391067
Abstract: An on-chip biochemical sensor based on two-dimensional waveguide-integrated plasmonic crystal formed by a nanogap tile (NGT) array is realized. By using on-chip optical lenses, an ultra-wide collimated Gaussian beam is launched, coupled with surface plasmonic crystals and collected with relatively low additional insertion loss, allowing a large sensing area. The optical field enhancement and stop-band shift of the NGT device for biochemical sensing are numerically and experimentally demonstrated with sensitivity reaching up to ∼ 260 n m / R I U . Our sensor is demonstrated with monolayer thiol molecules illustrating that it can be functionalized with this class of molecule which is commonly used with bulk surface plasmon resonance sensors.
Broadband Microwave Frequency Conversion Based on an Integrated Optical Micro-Comb Source
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-01-2020
Gaussian Beams Manipulation on a SOI Chip
Publisher: OSA
Date: 2014
Integrating Brillouin processing with functional circuits for enhanced RF photonic processing
Publisher: IEEE
Date: 10-2018
RF Photonics: An Optical Microcombs’ Perspective
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2018
Lateral Leakage in Silicon Photonics: Theory, Applications, and Future Directions
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2020
Waveguide optimization via evolutionary algorithms
Publisher: SPIE
Date: 21-12-2011
DOI: 10.1117/12.913964
RF and Microwave Fractional Differentiator Based on Photonics
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2020
Continuously tunable orthogonally polarized RF optical single sideband generator based on cascaded micro-ring resonators
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2540180
Coupled Ridge Resonator Filter Design using Microwave Engineering Filter Synthesis
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.P2_13
Abstract: An elegant filter synthesis technique commonly used in microwave engineering is utilized to synthesize coupled resonator filters with close spacing using the recently reported ridge resonators, achieving different filtering functions including Butterworth or Chebyshev responses.
Compact Brillouin devices through hybrid integration on silicon
Publisher: The Optical Society
Date: 25-07-2017
A Highly Versatile Microwave Photonic Filter Based on an Integrated Optical Frequency Comb Source
Publisher: OSA
Date: 2018
Ultra-dense optical data transmission over standard fibre with a single chip source
Publisher: Springer Science and Business Media LLC
Date: 22-05-2020
DOI: 10.1038/S41467-020-16265-X
Abstract: Micro-combs - optical frequency combs generated by integrated micro-cavity resonators – offer the full potential of their bulk counterparts, but in an integrated footprint. They have enabled breakthroughs in many fields including spectroscopy, microwave photonics, frequency synthesis, optical ranging, quantum sources, metrology and ultrahigh capacity data transmission. Here, by using a powerful class of micro-comb called soliton crystals, we achieve ultra-high data transmission over 75 km of standard optical fibre using a single integrated chip source. We demonstrate a line rate of 44.2 Terabits s −1 using the telecommunications C-band at 1550 nm with a spectral efficiency of 10.4 bits s −1 Hz −1 . Soliton crystals exhibit robust and stable generation and operation as well as a high intrinsic efficiency that, together with an extremely low soliton micro-comb spacing of 48.9 GHz enable the use of a very high coherent data modulation format (64 QAM - quadrature litude modulated). This work demonstrates the capability of optical micro-combs to perform in demanding and practical optical communications networks.
High-Order Microwave Photonic Intensity Differentiator Based on CMOS-Compatible Micro-Combs
Publisher: OSA
Date: 2018
Orthogonally polarized RF optical single sideband generation with integrated ring resonators
Publisher: IOP Publishing
Date: 04-2021
DOI: 10.1088/1674-4926/42/4/041305
Abstract: We review recent work on narrowband orthogonally polarized optical RF single sideband generators as well as dual-channel equalization, both based on high- Q integrated ring resonators. The devices operate in the optical telecommunications C-band and enable RF operation over a range of either fixed or thermally tuneable frequencies. They operate via TE/TM mode birefringence in the resonator. We achieve a very large dynamic tuning range of over 55 dB for both the optical carrier-to-sideband ratio and the dual-channel RF equalization for both the fixed and tunable devices.
Integrated lithium niobate polarization beam splitter based on a photonic-crystal-assisted multimode interference coupler
Publisher: Optica Publishing Group
Date: 23-12-2023
DOI: 10.1364/OL.478104
Abstract: Lithium niobate on insulator (LNOI) is a promising platform for high-speed photonic integrated circuits (PICs) that are used for communication systems due to the excellent electro-optic properties of lithium niobate (LN). In such circuits, the high-speed electro-optical modulators and switches need to be integrated with passive circuit components that are used for routing the optical signals. Polarization beam splitters (PBSs) are one of the fundamental passive circuit components for high-speed PICs that can be used to (de)multiplex two orthogonal polarization optical modes, enabling on-chip polarization ision multiplexing (PDM) systems, which are suitable for enhancing the data capacity of PICs. In this Letter, we design and experimentally demonstrate a high-performance PBS constructed by a photonic crystal (PC)-assisted multimode interference (MMI) coupler. The measured polarization extinction ratio (ER) of the fabricated device is 15 dB in the wavelength range from 1525 to 1565 nm, which makes them suitable for the high-speed and large data capacity PICs required for future communication systems.
Photonic radio frequency channelizers based on Kerr optical micro-combs
Publisher: IOP Publishing
Date: 04-2021
DOI: 10.1088/1674-4926/42/4/041302
Abstract: We review recent work on broadband RF channelizers based on integrated optical frequency Kerr micro-combs combined with passive micro-ring resonator filters, with microcombs having channel spacings of 200 and 49 GHz. This approach to realizing RF channelizers offers reduced complexity, size, and potential cost for a wide range of applications to microwave signal detection.
On-chip correlation-based Brillouin sensing: design, experiment, and simulation
Publisher: The Optical Society
Date: 21-12-2018
Thin Shallow-Ridge Silicon-on-Insulator Waveguide Transitions and Tapers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2013
Surface Morphology Induced Localized Electric Field and Piezoresponse Enhancement in Nanostructured Thin Films
Publisher: American Chemical Society (ACS)
Date: 27-01-2011
DOI: 10.1021/NN103561U
Abstract: Nanostructured piezoelectric and ferroelectric thin films are being increasingly used in sensing and actuating microdevices. In this work, we report the experimental discovery of localized electric field enhancement in nanocolumnar piezoelectric thin films and its significant impact on piezoresponse. The magnitude of electric field enhancement is associated with nonflat surface morphologies and is in agreement with theoretical and finite element models. The influence of this surface morphology induced enhancement on piezoresponse is demonstrated using phase field simulations, which also illustrates surface morphology induced strain enhancement. The observed enhancement can be effectively harnessed to improve the sensitivity of related piezoelectric thin film applications.
An ultra-compact waveguide polarizer based on “anti-magic widths”
Publisher: IEEE
Date: 09-2011
High bandwidth frequency modulation of an external cavity diode laser using an intracavity lithium niobate electro-optic modulator as output coupler
Publisher: AIP Publishing
Date: 08-2022
DOI: 10.1063/5.0097880
Abstract: We present a novel approach to high bandwidth laser frequency modulation. A lithium niobate chip is used as an intracavity electro-optic modulator in a tunable cateye external cavity diode laser. The modulator is conveniently integrated with the cateye output coupler, providing a unique approach to high bandwidth frequency stabilization and linewidth narrowing. The intracavity modulator feedback was successfully operated below 1 V and achieved superior frequency noise suppression compared to conventional feedback through diode injection current modulation. A closed loop bandwidth of 1.8 MHz was demonstrated, and the laser linewidth reduced to around 1 Hz as measured by the heterodyne measurement.
Design algorithm for compact low-reflection adiabatic photonic mode converters based on constant coupling
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2541260
High Q factor chalcogenide ring resonators for cavity-enhanced MIR spectroscopic sensing
Publisher: The Optical Society
Date: 23-07-2015
DOI: 10.1364/OE.23.019969
Photonic Perceptron Based on a Kerr Microcomb for High‐Speed, Scalable, Optical Neural Networks
Publisher: Wiley
Date: 06-08-2020
Titanium free optical waveguides in lithium niobate produced by Etching During Indiffusion of titanium (EDIT)
Publisher: IEEE
Date: 05-2011
Analysis of lateral leakage loss in silicon-on-insulator thin-rib waveguides
Publisher: IEEE
Date: 07-2008
Nonlinear Loss Engineering in a Silicon-Chalcogenide Hybrid Optical Waveguide
Publisher: OSA
Date: 2016
Ti-free optical waveguiding regions produced by LiNbO_3 etching during the indiffusion of Ti
Publisher: The Optical Society
Date: 08-02-2012
DOI: 10.1364/OL.37.000572
Photonic RF fractional Hilbert transformers and filters based on integrated soliton crystal microcombs
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEO_SI.2020.SW4J.7
Abstract: We report photonic RF fractional Hilbert transformers and filters based on a 49GHz soliton crystal micro-comb source. By employing up to 80 wavelengths and controlling the channel weights, erse transfer functions are achieved.
Ridge resonators: impact of excitation beam and resonator losses
Publisher: Optica Publishing Group
Date: 05-08-2021
DOI: 10.1364/OE.434574
Abstract: Photonic resonators based on bound states in the continuum are attractive for sensing and telecommunication applications, as they have the potential to achieve ultra-high Q-factor resonators in a compact footprint. Recently, ridge resonators – leaky mode resonators based on a bound state in the continuum – have been demonstrated on a scalable photonic integrated circuit platform. However, high Q-factor ridge resonators have thus far not been achieved. In this contribution, we investigate the influence of excitation beam width and optical losses on the spectral response of ridge resonators. We show that for practical applications, the space required of the excitation beam is the limiting factor on the highest achievable Q-factor.
Dynamic manipulation of modes in an optical waveguide using dielectrophoresis
Publisher: Wiley
Date: 07-2012
Abstract: The emergence of optofluidics has brought a high degree of tuneability and reconfigurability to optical devices. These possibilities are provided by characteristics of fluids including mobility, wide range of index modulation, and abrupt interfaces that can be easily reshaped. In this work, we created a new class of optofluidic waveguides, in which suspended mesoparticles were employed to greatly enhance the flexibility of the system. We demonstrated tuneable quasi single mode waveguides using spatially controllable mesoparticles in optofluidics. The coupling of waveguiding modes into the assembly of mesoparticles produces strong interactions and resonant conditions, which promote the transitions of the waveguiding modes. The modal response of the system depends on the distribution of packed particles above the polymeric rib waveguide which can be readily controlled under the appropriate combination of dielectrophoresis and hydrodynamic forces.
Optical frequency comb based system for photonic refractive index sensor interrogation
Publisher: The Optical Society
Date: 16-07-2019
DOI: 10.1364/OE.27.021532
Photonic RF Arbitrary Waveform Generator Based on a Soliton Crystal Micro-Comb Source
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-11-2020
Interrogation of photonic biosensors using optical frequency combs
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2541248
Anomalous losses in curved waveguides and directional couplers at “magic widths”
Publisher: IEEE
Date: 11-2008
Non-resonant recirculating light phase modulator
Publisher: AIP Publishing
Date: 10-2022
DOI: 10.1063/5.0103558
Abstract: High efficiency and a compact footprint are desired properties for electro-optic modulators. In this paper, we propose, theoretically investigate, and experimentally demonstrate a recirculating phase modulator, which increases the modulation efficiency by modulating the optical field several times in a non-resonant waveguide structure. The “recycling” of light is achieved by looping the optical path that exits the phase modulator back and coupling it to a higher order waveguide mode, which then repeats its passage through the phase modulator. By looping the light back twice, we were able to demonstrate a recirculating phase modulator that requires nine times lower power to generate the same modulation index of a single pass phase modulator. This approach to modulation efficiency enhancement is promising for the design of advanced tunable electro-optical frequency comb generators and other electro-optical devices with defined operational frequency bandwidths.
Integrated Subwavelength Gratings on a Lithium Niobate on Insulator Platform for Mode and Polarization Manipulation
Publisher: Wiley
Date: 20-05-2022
Abstract: Lithium niobate on insulator (LNOI) has emerged as a promising platform for photonic integrated circuits, with a fast‐growing toolbox of components. This paper proposes, designs, and experimentally demonstrates compact subwavelength grating (SWG) waveguides on an LNOI platform for on‐chip mode and polarization manipulation. To overcome the limitation of waveguide fabrication, the SWGs are designed and formed on a silicon nitride thin film deposited onto the surface of LNOI chip. As proof‐of‐concept devices, the SWG‐based spatial mode filters (including a TE 1 ‐mode‐pass filter and a TE 2 ‐mode‐pass filter) and a TM‐pass polarizer are fabricated successfully on the same chip, with the device lengths of only ≈50 μm. The measured insertion losses for the devices are lower than 3.1 dB, with high extinction ratio larger than 30 dB, at a wavelength of 1550 nm. The proposed and demonstrated SWGs can serve as important building blocks in a series of mode and polarization handling devices for LNOI integrated photonics.
Integrated Optical Power Equalizer Based on a Dual-Polarization Micro-Ring Resonator
Publisher: OSA
Date: 2018
Hybrid and heterogeneous photonic integration
Publisher: AIP Publishing
Date: 06-2021
DOI: 10.1063/5.0052700
Abstract: Increasing demand for every faster information throughput is driving the emergence of integrated photonic technology. The traditional silicon platform used for integrated electronics cannot provide all of the functionality required for fully integrated photonic circuits, and thus, the last decade has seen a strong increase in research and development of hybrid and heterogeneous photonic integrated circuits. These approaches have enabled record breaking experimental demonstrations, harnessing the most favorable properties of multiple material platforms, while the robustness and reliability of these technologies are suggesting entirely new approaches for precise mass manufacture of integrated circuits with unprecedented variety and flexibility. This Tutorial provides an overview of the motivation behind the integration of different photonic and material platforms. It reviews common hybrid and heterogeneous integration methods and discusses the advantages and shortcomings. This Tutorial also provides an overview of common photonic elements that are integrated in photonic circuits. Finally, an outlook is provided about the future directions of the hybrid/heterogeneous photonic integrated circuits and their applications.
Demonstration of a numerically optimized resonantly enhanced Mach-zehnder Modulator
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2006
Advanced RF and microwave functions based on an integrated optical frequency comb source
Publisher: The Optical Society
Date: 24-01-2018
DOI: 10.1364/OE.26.002569
On the efficacy of soliton crystal micro-combs as highly-parallel local oscillators for high-bandwidth systems
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C6F_1
Abstract: We investigate the performance of soliton crystal micro-comb lines as local oscillators, by emulating degradation through noise loading. We show a 0.3 b/symbol penalty for the minimum comb OSNR on a 64QAM signal.
Integrated subwavelength gratings on a lithium niobate on insulator platform for mode and polarization manipulation
Publisher: Research Square Platform LLC
Date: 31-01-2029
DOI: 10.21203/RS.3.RS-1310958/V1
Abstract: Lithium niobate on insulator (LNOI) has emerged as a promising platform for photonic integrated circuits, with a fast-growing toolbox of components. In this paper, we propose, design and experimentally demonstrate compact subwavelength grating (SWG) waveguides on a LNOI platform for on-chip mode and polarization manipulation. To overcome the limitation of waveguide fabrication, the SWGs are designed and formed on a silicon nitride thin film deposited onto the surface of LNOI chip. As proof-of-concept devices, the SWG-based spatial mode filters and a TM-pass polarizer are fabricated successfully on the same chip, with the device lengths of only ~50 μm. The measured insertion losses for the devices are lower than 3.1 dB, with high extinction ratio larger than 30 dB, at a wavelength of 1550 nm. The proposed and demonstrated SWGs can serve as important building blocks in a series of mode and polarization handling devices for LNOI integrated photonics.
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