ORCID Profile
0000-0002-1940-7172
Current Organisations
University of Southampton
,
Swedish University of Agricultural Sciences
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Publisher: The Optical Society
Date: 22-11-2017
DOI: 10.1364/OL.42.004849
Publisher: OSA
Date: 2018
Publisher: IEEE
Date: 08-2017
Publisher: The Optical Society
Date: 22-09-2017
DOI: 10.1364/OE.25.024157
Publisher: SPIE
Date: 25-10-2018
DOI: 10.1117/12.2503224
Publisher: IOP Publishing
Date: 17-05-2019
Abstract: The ability to process optical signals without passing into the electrical domain has always attracted the attention of the research community. Processing photons by photons unfolds new scenarios, in principle allowing for unseen signal processing and computing capabilities. Optical computation can be seen as a large scientific field in which researchers operate, trying to find solutions to their specific needs by different approaches although the challenges can be substantially different, they are typically addressed using knowledge and technological platforms that are shared across the whole field. This significant know-how can also benefit other scientific communities, providing lateral solutions to their problems, as well as leading to novel applications. The aim of this Roadmap is to provide a broad view of the state-of-the-art in this lively scientific research field and to discuss the advances required to tackle emerging challenges, thanks to contributions authored by experts affiliated to both academic institutions and high-tech industries. The Roadmap is organized so as to put side by side contributions on different aspects of optical processing, aiming to enhance the cross-contamination of ideas between scientists working in three different fields of photonics: optical gates and logical units, high bit-rate signal processing and optical quantum computing. The ultimate intent of this paper is to provide guidance for young scientists as well as providing research-funding institutions and stake holders with a comprehensive overview of perspectives and opportunities offered by this research field.
Publisher: The Optical Society
Date: 22-06-2018
DOI: 10.1364/OL.43.003100
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2018
Publisher: OSA
Date: 2017
Publisher: IEEE
Date: 08-2016
Publisher: Springer Science and Business Media LLC
Date: 21-11-2019
DOI: 10.1038/S41377-019-0217-Z
Abstract: Broadband mid-infrared light sources are highly desired for wide-ranging applications that span free-space communications to spectroscopy. In recent years, silicon has attracted great interest as a platform for nonlinear optical wavelength conversion in this region, owing to its low losses (linear and nonlinear) and high stability. However, most research in this area has made use of small core waveguides fabricated from silicon-on-insulator platforms, which suffer from high absorption losses of the use of silica cladding, limiting their ability to generate light beyond 3 µm. Here, we design and demonstrate a compact silicon core, silica-clad waveguide platform that has low losses across the entire silicon transparency window. The waveguides are fabricated from a silicon core fibre that is tapered to engineer mode properties to ensure efficient nonlinear propagation in the core with minimal interaction of the mid-infrared light with the cladding. These waveguides exhibit many of the benefits of fibre platforms, such as a high coupling efficiency and power handling capability, allowing for the generation of mid-infrared supercontinuum spectra with high brightness and coherence spanning almost two octaves (1.6–5.3 µm).
Publisher: American Association for the Advancement of Science (AAAS)
Date: 11-03-2016
Abstract: A chip-based microresonator enables time-bin entanglement [Also see Report by Reimer et al. ]
Publisher: The Optical Society
Date: 14-05-2019
DOI: 10.1364/OME.9.002573
Publisher: The Optical Society
Date: 07-02-2019
DOI: 10.1364/OE.27.004462
Publisher: OSA
Date: 2018
Publisher: SPIE
Date: 08-03-2014
DOI: 10.1117/12.2039179
Publisher: The Optical Society
Date: 24-05-2017
DOI: 10.1364/OME.7.002055
Publisher: Optica Publishing Group
Date: 28-05-2020
DOI: 10.1364/OE.394871
Abstract: A novel technique for realization of configurable/one-time programmable (OTP) silicon photonic circuits is presented. Once the proposed photonic circuit is programmed, its signal routing is retained without the need for additional power consumption. This technology can potentially enable a multi-purpose design of photonic chips for a range of different applications and performance requirements, as it can be programmed for each specific application after chip fabrication. Therefore, the production costs per chip can be reduced because of the increase in production volume, and rapid prototyping of new photonic circuits is enabled. Essential building blocks for the configurable circuits in the form of erasable directional couplers (DCs) were designed and fabricated, using ion implanted waveguides. We demonstrate permanent switching of optical signals between the drop port and through the port of the DCs using a localized post-fabrication laser annealing process. Proof-of-principle demonstrators in the form of generic 1×4 and 2×2 programmable switching circuits were fabricated and subsequently programmed.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-06-2014
Publisher: Optica Publishing Group
Date: 25-10-2021
DOI: 10.1364/JOSAB.439330
Abstract: The physics and applications of fiber-based supercontinuum (SC) sources have been a subject of intense interest over the last decade, with significant impact on both basic science and industry. New uses for SC sources are also constantly emerging due to their unique properties that combine high brightness, multi-octave frequency bandwidth, fiber delivery, and single-mode output. The last few years have seen significant research efforts focused on extending the wavelength coverage of SC sources towards the 2 to 20 µ m molecular fingerprint mid-infrared (MIR) region and in the ultraviolet (UV) down to 100 nm, while also improving stability, noise and coherence, output power, and polarization properties. Here we review a selection of recent advances in SC generation in a range of specialty optical fibers, including fluoride, chalcogenide, telluride, and silicon-core fibers for the MIR UV-grade silica fibers and gas-filled hollow-core fibers for the UV range and all-normal dispersion fibers for ultralow-noise coherent SC generation.
Publisher: IEEE
Date: 07-2018
Publisher: OSA
Date: 2017
Publisher: SPIE
Date: 22-02-2018
DOI: 10.1117/12.2292199
Publisher: Elsevier BV
Date: 15-03-2003
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2018
Publisher: MDPI AG
Date: 09-10-2020
DOI: 10.3390/W12102799
Abstract: Urbanization impacts stream ecosystems globally through degraded water quality, altered hydrology, and landscape disturbances at the catchment and riparian scales, causing bio ersity losses and altered system functioning. Addressing the “urban stream syndrome” requires multiple mitigation tools, and rehabilitation of riparian vegetation may help improve stream ecological status and provide key ecosystem services. However, the extent to which forested riparian buffers can help support stream bio ersity in the face of numerous environmental contingencies remains uncertain. We assessed how a key indicator of stream ecological status, benthic diatoms, respond to riparian habitat conditions using 10 urban site pairs (each comprising of one unbuffered and one buffered reach), and additional urban downstream and forest reference upstream sites in the Oslo Fjord basin. Diatom communities were structured by multiple drivers including spatial location, land use, water quality, and instream habitat. Among these, riparian habitat condition independently explained 16% of variation in community composition among site pairs. Changes in community structure and indicator taxa, along with a reduction in pollution-tolerant diatoms, suggested tangible benefits of forested riparian buffers for stream bio ersity in urban environments. Managing urban impacts requires multiple solutions, with forested riparian zones providing a potential tool to help improve bio ersity and ecosystem services.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-01-2018
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Anna Peacock.