Transverse modal instability in two-mode fiber amplifiers: effect of input mode

Michalis N. Zervas

doi:10.1117/12.2649760

8 March 2023 Transverse modal instability in two-mode fiber amplifiers: effect of input mode

Michalis N. Zervas

Proceedings Volume 12400, Fiber Lasers XX: Technology and Systems; 124000R (2023) https://doi.org/10.1117/12.2649760
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

We study modal instabilities in two-mode fiber amplifiers, when the signal is launched either in the lower-order (LP₀₁) or the higher-order (LP₁₁) mode. Launching predominantly into the lowest-order mode (LP₀₁) results in the well-known TMI effects, with a characteristic sharp increase of the TMI gain above a power threshold. Quite surprisingly, launching predominantly into the HOM (LP₁₁) shows no sharp increase of the TMI gain and total absence of a distinctive power threshold. This shows that launching the signal into the HOM results in a much more stable, robust, and resilient performance against perturbations.

Conference Presentation

Citation Download Citation

Michalis N. Zervas "Transverse modal instability in two-mode fiber amplifiers: effect of input mode", Proc. SPIE 12400, Fiber Lasers XX: Technology and Systems, 124000R (8 March 2023); https://doi.org/10.1117/12.2649760

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