Polarization instability in high power fiber amplifiers

Cesar Jauregui; Yiming Tu; Sobhy Kholaif; Jens Limpert

doi:10.1117/12.3000538

12 March 2024 Polarization instability in high power fiber amplifiers

Cesar Jauregui, Yiming Tu, Sobhy Kholaif, Jens Limpert

Proceedings Volume 12865, Fiber Lasers XXI: Technology and Systems; 128650I (2024) https://doi.org/10.1117/12.3000538
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

We study a phenomenon related to TMI in PM fiber amplifiers: polarization instability. Hereby the polarization of the Fundamental Mode (FM) and of the Higher Order Mode (HOM) in a PM fiber fluctuate during TMI, but the HOM shows significantly stronger polarization changes than the FM. In this work, we will explain the reasons for this behavior and also show that these instabilities, or at least the increase of the sensitivity of the polarization of the HOM to external perturbations, occur even below the TMI threshold.

Citation Download Citation

Cesar Jauregui, Yiming Tu, Sobhy Kholaif, and Jens Limpert "Polarization instability in high power fiber amplifiers", Proc. SPIE 12865, Fiber Lasers XXI: Technology and Systems, 128650I (12 March 2024); https://doi.org/10.1117/12.3000538

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