Estimating modal instability threshold for photonic crystal rod fiber amplifiers | Zendy

Mette M. Johansen | Zendy; Kristian Rymann Hansen | Zendy; Marko Laurila | Zendy; Thomas Tanggaard Alkeskjold | Zendy; Jesper Lægsgaard | Zendy

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Estimating modal instability threshold for photonic crystal rod fiber amplifiers

Author(s) -

Mette M. Johansen,

Kristian Rymann Hansen,

Marko Laurila,

Thomas Tanggaard Alkeskjold,

Jesper Lægsgaard

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.015409

Subject(s) - optics , photonic crystal fiber , instability , modal , amplifier , materials science , coupling (piping) , fiber laser , photonic crystal , physics , fiber , optical fiber , optoelectronics , mechanics , cmos , polymer chemistry , metallurgy , composite material

We present a semi-analytic numerical model to estimate the transverse modal instability (TMI) threshold for photonic crystal rod amplifiers. The model includes thermally induced waveguide perturbations in the fiber cross section modeled with finite element simulations, and the relative intensity noise (RIN) of the seed laser, which seeds mode coupling between the fundamental and higher order mode. The TMI threshold is predicted to ~370 W - 440 W depending on RIN for the distributed modal filtering rod fiber.

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