ORCID Profile
0000-0001-9378-9490
Current Organisations
University of Southampton
,
QuiX Quantum BV
,
University of Waterloo
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Publisher: OSA
Date: 2016
Publisher: OSA
Date: 2016
Publisher: American Physical Society (APS)
Date: 10-04-2014
Publisher: IEEE
Date: 06-2019
Publisher: The Optical Society
Date: 06-09-2018
DOI: 10.1364/OE.26.024678
Publisher: IEEE
Date: 06-2019
Publisher: Optica Publishing Group
Date: 02-07-2020
DOI: 10.1364/OE.396798
Abstract: We have demonstrated the inscription of Bragg gratings into five in idual cores of a seven core fiber using small spot direct UV writing. With this technique, we defined spectrally multiplexed Bragg gratings consecutively in separate cores as well as spectrally multiplexed gratings at the same longitudinal location in different cores. The effect of bending on the optical spectrum was evaluated to allow the differentiation between cross-exposure and cross-talk, and an alignment process to reduce cross-exposure by 13 dB was found.
Publisher: The Optical Society
Date: 31-10-2017
DOI: 10.1364/OE.25.028236
Publisher: The Optical Society
Date: 31-08-2018
Publisher: The Optical Society
Date: 29-03-2018
DOI: 10.1364/OE.26.009155
Publisher: The Optical Society
Date: 31-01-2019
DOI: 10.1364/OL.44.000703
Publisher: Optica Publishing Group
Date: 02-07-2020
DOI: 10.1364/OE.389211
Abstract: A blazed chirped Bragg grating in a planar silica waveguide device was used to create an integrated diffractive element for a spectrometer. The grating diffracts light from a waveguide and creates a wavelength dependent focus in a manner similar to a bulk diffraction grating spectrometer. An external imaging system is used to analyse the light, later device iterations plan to integrate detectors to make a fully integrated spectrometer. Devices were fabricated with grating period chirp rates in excess of 100 nm mm −1 , achieving a focal length of 5.5 mm. Correction of coma aberrations resulted in a device with a footprint of 20 mm×10 mm, a peak FWHM resolution of 1.8 nm, a typical FWHM resolution of 2.6 nm and operating with a 160 nm bandwidth centered at 1550 nm.
Publisher: IEEE
Date: 11-2019
Publisher: IEEE
Date: 11-2019
Publisher: American Physical Society (APS)
Date: 06-07-2021
Publisher: SPIE
Date: 14-09-2018
DOI: 10.1117/12.2319391
Publisher: Springer Science and Business Media LLC
Date: 10-01-2012
DOI: 10.1038/NCOMMS1628
Publisher: Optica Publishing Group
Date: 29-03-2022
DOI: 10.1364/OE.445876
Abstract: We demonstrate that the stimulated Brillouin scattering of a 250 mm long distributed feedback Raman fiber laser can self-pulse with repetition rates up to 7 MHz, pulse widths of 25 ns, and peak powers of 1.2 W. While both CW and pulsed lasing are produced from a bespoke grating at 1119 nm this laser design could be constructed at almost any wavelength, as the Raman and Brillouin gain regions are relative to the pump wavelength. The laser has a low lasing threshold for a Raman laser of 0.55 W, a peak slope efficiency of 14 %, and a maximum average output of 0.25 W. An investigation of beating between pure Raman and Raman-pumped Brillouin lasing shows that the outputs of the two processes are highly correlated and thus the Brillouin lasing is essentially single-frequency when CW and near transform limited for pulsed operation. A phenomenological model of the Raman-Brillouin interaction shows that the pulsing behaviour of such a cavity is expected and produces very similar pulsing to that the seen in experimental results.
Publisher: The Optical Society
Date: 08-04-2019
DOI: 10.1364/OE.27.011174
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Devin Smith.