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Nonlinear polarisation effects in optical microcoil resonators with fibre twist and birefringence

Nonlinear polarisation effects in optical microcoil resonators with fibre twist and birefringence
Nonlinear polarisation effects in optical microcoil resonators with fibre twist and birefringence
We study the nonlinear response of optical microcoil resonators (OMRs) based on twisted birefringent microfibres by incorporating Kerr nonlinearity into the underlying coupled mode equations. The resulting hysteresis characteristics were found to be highly polarisation dependent, with both the switching powers and contrast levels strongly influenced by the twist-induced cross-polarisation coupling. In addition, the existence of multiple bistability in OMRs is explored when the two orthogonal polarisations' resonances are spectrally close enough to influence the propagation of a monochromatic pump. Both the bistability and nonlinear switching may potentially be utilised for implementing polarisation-sensitive devices, especially for signal processing purposes, and benefit from the low threshold powers needed to observe nonlinear effects in OMRs,
0030-4018
4670-4676
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Broderick, Neil G.R.
1b3f7d34-4fd4-4ec5-9b90-c3cfb176f757
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Broderick, Neil G.R.
1b3f7d34-4fd4-4ec5-9b90-c3cfb176f757
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Lee, Timothy, Broderick, Neil G.R. and Brambilla, Gilberto (2012) Nonlinear polarisation effects in optical microcoil resonators with fibre twist and birefringence. Optics Communications, 285 (23), 4670-4676. (doi:10.1016/j.optcom.2012.05.005).

Record type: Article

Abstract

We study the nonlinear response of optical microcoil resonators (OMRs) based on twisted birefringent microfibres by incorporating Kerr nonlinearity into the underlying coupled mode equations. The resulting hysteresis characteristics were found to be highly polarisation dependent, with both the switching powers and contrast levels strongly influenced by the twist-induced cross-polarisation coupling. In addition, the existence of multiple bistability in OMRs is explored when the two orthogonal polarisations' resonances are spectrally close enough to influence the propagation of a monochromatic pump. Both the bistability and nonlinear switching may potentially be utilised for implementing polarisation-sensitive devices, especially for signal processing purposes, and benefit from the low threshold powers needed to observe nonlinear effects in OMRs,

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More information

Published date: October 2012
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 349938
URI: http://eprints.soton.ac.uk/id/eprint/349938
ISSN: 0030-4018
PURE UUID: 94f9dc7e-9f68-46b2-b38a-12ba72eeb187

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Date deposited: 15 Mar 2013 09:02
Last modified: 12 Nov 2019 17:30

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