Polarization-maintaining (PM) nonlinear-amplifying-loop-mirror (NALM) mode-locked fiber laser utilizing a 3x3 coupler

Dohyun Kim; Bong-Wan Lee; Jungwon Kim

doi:10.1117/12.2508524

7 March 2019 Polarization-maintaining (PM) nonlinear-amplifying-loop-mirror (NALM) mode-locked fiber laser utilizing a 3×3 coupler

Dohyun Kim, Bong-Wan Lee, Jungwon Kim

Author Affiliations +

Proceedings Volume 10897, Fiber Lasers XVI: Technology and Systems; 108972C (2019) https://doi.org/10.1117/12.2508524
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

We demonstrate a PM-NALM fiber laser utilizing a 3x3 coupler. While a 2x2 coupler causes no phase bias between counter-propagating lights in the NALM, the 3x3 coupler can generate a phase bias (2μ3) in the NALM without an additional nonreciprocal phase shifter. As a result, this 3x3 coupler-based NALM laser requires less than 2 times pump power for the mode-locking initiation compared to the 2x2 PM-NALM laser with a similar repetition-rate and configuration. The minimum rms relative-intensity-noise (RIN) is only 0.0048% integrated from 10 Hz to 1 MHz offset frequency, which is one of the lowest RINs demonstrated from free-running mode-locked lasers so far.

Citation Download Citation

Dohyun Kim, Bong-Wan Lee, and Jungwon Kim "Polarization-maintaining (PM) nonlinear-amplifying-loop-mirror (NALM) mode-locked fiber laser utilizing a 3×3 coupler", Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 108972C (7 March 2019); https://doi.org/10.1117/12.2508524

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