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Analysis and optimization of acoustic speed profiles with large transverse variations for mitigation of stimulated Brillouin scattering in optical fibers

Analysis and optimization of acoustic speed profiles with large transverse variations for mitigation of stimulated Brillouin scattering in optical fibers
Analysis and optimization of acoustic speed profiles with large transverse variations for mitigation of stimulated Brillouin scattering in optical fibers
We derive and numerically verify a simple analytical approximation for the calculation of Brillouin gain spectra (BGS) in acoustically antiguiding optical fibers. We use our approximation to find acoustic speed profiles that minimize the peak Brillouin gain. The optimized BGS are top-hat-shaped, regardless of the optical mode distribution, with peak value inversely proportional to the effective area of the optical mode. We further investigate acoustically guiding speed profiles, in which acoustic waveguide modes lead to peaks in the Brillouin gain spectrum. However, for large cores with diameters down to 50 µm, and often even smaller, these Brillouin gain peaks are spectrally dense, and can be smeared out due to broadening in many practical systems. The Brillouin gain spectrum is then similar for waveguiding and antiguiding acoustic profiles
0003-6935
1388-1399
Yoo, Seongwoo
4714ed34-2088-4d00-a4bb-9d153384c36e
Codemard, Christophe A.
3aa50483-b61c-4e7e-b178-c9a88bb47bef
Jeong, Yoonchan
94ab6f5b-7623-4061-8598-8de2e7aa751e
Sahu, Jayanta K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Yoo, Seongwoo
4714ed34-2088-4d00-a4bb-9d153384c36e
Codemard, Christophe A.
3aa50483-b61c-4e7e-b178-c9a88bb47bef
Jeong, Yoonchan
94ab6f5b-7623-4061-8598-8de2e7aa751e
Sahu, Jayanta K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b

Yoo, Seongwoo, Codemard, Christophe A., Jeong, Yoonchan, Sahu, Jayanta K. and Nilsson, Johan (2010) Analysis and optimization of acoustic speed profiles with large transverse variations for mitigation of stimulated Brillouin scattering in optical fibers. Applied Optics, 49 (8), 1388-1399. (doi:10.1364/AO.49.001388).

Record type: Article

Abstract

We derive and numerically verify a simple analytical approximation for the calculation of Brillouin gain spectra (BGS) in acoustically antiguiding optical fibers. We use our approximation to find acoustic speed profiles that minimize the peak Brillouin gain. The optimized BGS are top-hat-shaped, regardless of the optical mode distribution, with peak value inversely proportional to the effective area of the optical mode. We further investigate acoustically guiding speed profiles, in which acoustic waveguide modes lead to peaks in the Brillouin gain spectrum. However, for large cores with diameters down to 50 µm, and often even smaller, these Brillouin gain peaks are spectrally dense, and can be smeared out due to broadening in many practical systems. The Brillouin gain spectrum is then similar for waveguiding and antiguiding acoustic profiles

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Published date: March 2010

Identifiers

Local EPrints ID: 179473
URI: https://eprints.soton.ac.uk/id/eprint/179473
ISSN: 0003-6935
PURE UUID: 83a01552-6bc6-4ba7-b0b8-0d31cadf7d7d
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

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Date deposited: 01 Apr 2011 13:45
Last modified: 18 Jul 2019 16:20

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