ORCID Profile
0000-0003-4378-7619
Current Organisation
Nanyang Technological University
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Publisher: IOP Publishing
Date: 07-04-2017
Publisher: Springer Science and Business Media LLC
Date: 09-05-2017
DOI: 10.1038/S41598-017-01839-5
Abstract: Modes attenuation of the tube lattice fiber (TLF) is characterized by D /λ, where D is the core diameter and λ is the wavelength. Hence, the TLF is structured with a large core to ensure a low attenuation loss. A small core, on the other hand, facilitates the gas-filled TLF applications, but at the expense of the increased mode attenuation. We show that adding a second cladding layer to the conventional one layer TLF (1TLF) can resolve the contradicting requirements. The mode attenuation of TLF with two cladding layers (2TLF) is less influenced by the D / λ value as compared to 1TLF, thus realizing a low loss small core TLF. Furthermore, we found that adding the second layer brings another advantage to a bending performance. With a determined core size, D , a 1TLF with smaller capillary hole size, d , experiences less bending loss. However, the reduced d increases the confinement loss that counteracts the bending loss improvement. This confliction is substantially alleviated in 2TLF thanks to the second cladding layer. Theoretical investigations and experimental demonstrations are presented to evidence the important role of the second cladding ring in the TLF, which has been overlooked in prior studies.
Publisher: SPIE
Date: 11-03-2016
DOI: 10.1117/12.2213902
Publisher: The Optical Society
Date: 09-11-2016
DOI: 10.1364/OE.24.026667
Publisher: Wiley
Date: 09-04-2023
Abstract: Mid‐infrared (IR) supercontinuum (SC) lasers are important in applications such as pollution detection, stand‐off detection, and non‐destructive testing. The performance in many applications is limited by the noise level of the supercontinuum laser. High noise typically results in low sensitivities or a need for long integration times. In this paper, a simple technique to reduce the noise of high noise soliton‐based SC sources is introduced by adding a short piece of normal dispersion fiber to force the spectrally distributed solitons to spectrally broaden through self‐phase modulation and thereby overlap to average out the noise. The noise reduction is demonstrated experimentally and numerically using a ZBLAN fiber based mid‐IR SC source and adding a short piece of highly nonlinear arsenic‐sulfide fiber. However, the method is generally applicable to any soliton‐based near‐IR or mid‐IR SC source. Its efficiency is underlined by experimentally comparing it to SC generation in fibers in which a second zero‐dispersion wavelength provides the spectral alignment noise reduction mechanism.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-08-2022
Publisher: Elsevier BV
Date: 04-2001
Publisher: MDPI AG
Date: 22-11-2018
DOI: 10.3390/FIB6040089
Abstract: Hollow-Core Anti-Resonant Fiber (HC-ARF) shows promising applications. Nevertheless, there has been a persistent problem when it comes to all-fiber integration due to a lack of HC-ARF-based fiber components. In response to this remaining challenge, we investigate a reliable, versatile and efficient method to convert an HC-ARF into a fiber filter. By locally heating an HC-ARF with a CO2 laser, the fiber structure becomes deformed, and cladding capillaries shrink to produce a thicker wall. This process is analogous to “writing” a new fiber with a thicker wall on the original fiber, resulting in creating new high loss regions in the original transmission bands. Thus, the construction of a fiber filter is realized by “writing” a new fiber on the original fiber. The feasibility of this method is confirmed through experiments, adopting both one- and two-layer HC-ARF. The HC-ARF-based fiber filters are found to have transmission spectra consistent with simulation prediction. Both band pass and band reject fiber filters with more than a 20-dB extinction ratio are obtainable without extra loss. Thus, an in-fiber HC-ARF filter is demonstrated by the CO2 writing process. Its versatile approach promises controlled band selection and would find interesting applications to be discussed.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2016
Publisher: The Optical Society
Date: 31-03-2016
DOI: 10.1364/OE.24.007670
Publisher: SPIE
Date: 22-02-2017
DOI: 10.1117/12.2251648
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2019
Publisher: OSA
Date: 2013
Publisher: OSA
Date: 2016
Publisher: The Optical Society
Date: 21-12-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2014
Publisher: SPIE
Date: 07-03-2019
DOI: 10.1117/12.2509291
Location: Korea, Republic of
No related grants have been discovered for Seongwoo Yoo.