Optimization of phase modulation with arbitrary waveform generators for optical spectral control and suppression of stimulated Brillouin scattering
Optimization of phase modulation with arbitrary waveform generators for optical spectral control and suppression of stimulated Brillouin scattering
We investigate the use of an arbitrary waveform generator to phase-modulate a laser source and externally broaden its linewidth. Through nonlinear optimization in a computer, we find modulation signals that produce top-hat-shaped optical spectra of discrete lines with highest total power within a limited bandwidth and limited peak spectral power density. The required modulation bandwidth is comparable to the targeted optical bandwidth. Such spectra are attractive for suppressing stimulated Brillouin scattering in optical fiber. Experimentally, we generate 15 lines in a 0.5 GHz optical linewidth. However, the method can also be used to generate other optical spectra.
6988
Harish, Achar V.
833a8dce-cb98-479c-a78d-f754883ff2fd
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
February 2015
Harish, Achar V.
833a8dce-cb98-479c-a78d-f754883ff2fd
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Harish, Achar V. and Nilsson, Johan
(2015)
Optimization of phase modulation with arbitrary waveform generators for optical spectral control and suppression of stimulated Brillouin scattering.
Optics Express, 23 (6), .
(doi:10.1364/OE.23.006988).
Abstract
We investigate the use of an arbitrary waveform generator to phase-modulate a laser source and externally broaden its linewidth. Through nonlinear optimization in a computer, we find modulation signals that produce top-hat-shaped optical spectra of discrete lines with highest total power within a limited bandwidth and limited peak spectral power density. The required modulation bandwidth is comparable to the targeted optical bandwidth. Such spectra are attractive for suppressing stimulated Brillouin scattering in optical fiber. Experimentally, we generate 15 lines in a 0.5 GHz optical linewidth. However, the method can also be used to generate other optical spectra.
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Accepted/In Press date: 16 February 2015
Published date: February 2015
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 378802
URI: http://eprints.soton.ac.uk/id/eprint/378802
ISSN: 1094-4087
PURE UUID: 6a77352c-afa9-4089-9590-b2921ce68d5c
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Date deposited: 16 Jul 2015 10:27
Last modified: 15 Mar 2024 02:59
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Author:
Achar V. Harish
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