Thermo-optic instabilities in asymmetric dual-core amplifiers

Jesper Lægsgaard; Federica Poli; Annamaria Cucinotta; Stefano Selleri

doi:10.1364/JOSAB.389601

Thermo-optic instabilities in asymmetric dual-core amplifiers

Jesper Lægsgaard^*
, Federica Poli
, Annamaria Cucinotta
, Stefano Selleri

^*Corresponding author for this work

University of Parma

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Dynamical thermo-optic instabilities in asymmetric dual-core fiber amplifiers are investigated by numerical simulations. A coupled-mode model capable of describing the asymmetric dual-core structure is derived, and structures with various levels of refractive-index asymmetry from 10⁻⁶ to 10⁻⁴ are studied. The most viable route to avoid thermally induced power signal field fluctuations is found to be core decoupling via large separation and strong refractive-index asymmetry. A design criterion for this strategy to be effective is suggested based on the numerical results.

Original language	English
Journal	Journal of the Optical Society of America B: Optical Physics
Volume	37
Issue number	5
Pages (from-to)	1494-1501
ISSN	0740-3224
DOIs	https://doi.org/10.1364/JOSAB.389601
Publication status	Published - 1 May 2020

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abstract = "Dynamical thermo-optic instabilities in asymmetric dual-core fiber amplifiers are investigated by numerical simulations. A coupled-mode model capable of describing the asymmetric dual-core structure is derived, and structures with various levels of refractive-index asymmetry from 10−6 to 10−4 are studied. The most viable route to avoid thermally induced power signal field fluctuations is found to be core decoupling via large separation and strong refractive-index asymmetry. A design criterion for this strategy to be effective is suggested based on the numerical results.",

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AU - Cucinotta, Annamaria

AU - Selleri, Stefano

PY - 2020/5/1

Y1 - 2020/5/1

N2 - Dynamical thermo-optic instabilities in asymmetric dual-core fiber amplifiers are investigated by numerical simulations. A coupled-mode model capable of describing the asymmetric dual-core structure is derived, and structures with various levels of refractive-index asymmetry from 10−6 to 10−4 are studied. The most viable route to avoid thermally induced power signal field fluctuations is found to be core decoupling via large separation and strong refractive-index asymmetry. A design criterion for this strategy to be effective is suggested based on the numerical results.

AB - Dynamical thermo-optic instabilities in asymmetric dual-core fiber amplifiers are investigated by numerical simulations. A coupled-mode model capable of describing the asymmetric dual-core structure is derived, and structures with various levels of refractive-index asymmetry from 10−6 to 10−4 are studied. The most viable route to avoid thermally induced power signal field fluctuations is found to be core decoupling via large separation and strong refractive-index asymmetry. A design criterion for this strategy to be effective is suggested based on the numerical results.

U2 - 10.1364/JOSAB.389601

DO - 10.1364/JOSAB.389601

M3 - Journal article

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JO - Journal of the Optical Society of America B: Optical Physics

JF - Journal of the Optical Society of America B: Optical Physics

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ER -

Thermo-optic instabilities in asymmetric dual-core amplifiers

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