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Analytical time-dependent theory of thermally induced modal instabilities in high power fiber amplifiers

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Analytical time-dependent theory of thermally induced modal instabilities in high power fiber amplifiers. / Hu, I-Ning; Zhu, Cheng; Thomas, Alexander George Roy et al.
In: Proceedings of SPIE, Vol. 8601, 1671611, 02.02.2013.

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Hu I-N, Zhu C, Thomas AGR, Galvanauskas A. Analytical time-dependent theory of thermally induced modal instabilities in high power fiber amplifiers. Proceedings of SPIE. 2013 Feb 2;8601:1671611. doi: 10.1117/12.2002732

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@article{ba4c049290b249c781a2c12bd8ab869a,
title = "Analytical time-dependent theory of thermally induced modal instabilities in high power fiber amplifiers",
abstract = "A time-dependent analytical model is rigorously derived which shows that the thermally induced modal instability in high power rare-earth doped fiber amplifiers is fundamentally a two-wave mixing between fundamental and higher-order modes through a thermally-induced grating imprinted by beating between these modes. We show that previously postulated movement of this grating to phase-match the coupling between the modes naturally occurs due to a finite thermal-response time of a fiber. This theory is consistent with experimental observations in that it accurately predicts the onset-like threshold and temporal instabilities in the kilohertz-frequency range.",
author = "I-Ning Hu and Cheng Zhu and Thomas, {Alexander George Roy} and Almantas Galvanauskas",
year = "2013",
month = feb,
day = "2",
doi = "10.1117/12.2002732",
language = "English",
volume = "8601",
journal = "Proceedings of SPIE",
issn = "0277-786X",
publisher = "SPIE",

}

RIS

TY - JOUR

T1 - Analytical time-dependent theory of thermally induced modal instabilities in high power fiber amplifiers

AU - Hu, I-Ning

AU - Zhu, Cheng

AU - Thomas, Alexander George Roy

AU - Galvanauskas, Almantas

PY - 2013/2/2

Y1 - 2013/2/2

N2 - A time-dependent analytical model is rigorously derived which shows that the thermally induced modal instability in high power rare-earth doped fiber amplifiers is fundamentally a two-wave mixing between fundamental and higher-order modes through a thermally-induced grating imprinted by beating between these modes. We show that previously postulated movement of this grating to phase-match the coupling between the modes naturally occurs due to a finite thermal-response time of a fiber. This theory is consistent with experimental observations in that it accurately predicts the onset-like threshold and temporal instabilities in the kilohertz-frequency range.

AB - A time-dependent analytical model is rigorously derived which shows that the thermally induced modal instability in high power rare-earth doped fiber amplifiers is fundamentally a two-wave mixing between fundamental and higher-order modes through a thermally-induced grating imprinted by beating between these modes. We show that previously postulated movement of this grating to phase-match the coupling between the modes naturally occurs due to a finite thermal-response time of a fiber. This theory is consistent with experimental observations in that it accurately predicts the onset-like threshold and temporal instabilities in the kilohertz-frequency range.

U2 - 10.1117/12.2002732

DO - 10.1117/12.2002732

M3 - Journal article

VL - 8601

JO - Proceedings of SPIE

JF - Proceedings of SPIE

SN - 0277-786X

M1 - 1671611

ER -