Theory of thermo-optic instabilities in dual-core fiber amplifiers

Jesper Lægsgaard; Federica Poli; Annamaria Cucinotta; Stefano Selleri

doi:10.1364/OL.43.004775

Theory of thermo-optic instabilities in dual-core fiber 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

Abstract

A coupled-mode theory for nonlinear mode coupling by the thermo-optic effect, originally developed for single-core fiber amplifiers, is applied to the case of dual-core amplifiers. It is shown that a non-phase-matched coupling term, which is usually irrelevant in single-core amplifiers, can strongly affect the mode stability when the coupling length between supermodes exceeds a few centimeters. The phase-mismatched coupling can lead to a strongly reduced instability threshold and static deformation effects for a range of intermediate coupling lengths. (C) 2018 Optical Society of America

Original language	English
Journal	Optics Letters
Volume	43
Issue number	19
Pages (from-to)	4775-4778
ISSN	0146-9592
DOIs	https://doi.org/10.1364/OL.43.004775
Publication status	Published - 2018

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title = "Theory of thermo-optic instabilities in dual-core fiber amplifiers",

abstract = "A coupled-mode theory for nonlinear mode coupling by the thermo-optic effect, originally developed for single-core fiber amplifiers, is applied to the case of dual-core amplifiers. It is shown that a non-phase-matched coupling term, which is usually irrelevant in single-core amplifiers, can strongly affect the mode stability when the coupling length between supermodes exceeds a few centimeters. The phase-mismatched coupling can lead to a strongly reduced instability threshold and static deformation effects for a range of intermediate coupling lengths. (C) 2018 Optical Society of America",

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AU - Poli, Federica

AU - Cucinotta, Annamaria

AU - Selleri, Stefano

PY - 2018

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AB - A coupled-mode theory for nonlinear mode coupling by the thermo-optic effect, originally developed for single-core fiber amplifiers, is applied to the case of dual-core amplifiers. It is shown that a non-phase-matched coupling term, which is usually irrelevant in single-core amplifiers, can strongly affect the mode stability when the coupling length between supermodes exceeds a few centimeters. The phase-mismatched coupling can lead to a strongly reduced instability threshold and static deformation effects for a range of intermediate coupling lengths. (C) 2018 Optical Society of America

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DO - 10.1364/OL.43.004775

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Theory of thermo-optic instabilities in dual-core fiber amplifiers

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