Polarization-maintaining nonlinear-amplifying-loop-mirror mode-locked fiber laser based on a 3 x 3 coupler

被引：36

作者：

Kim, Dohyun ^{[1
]}

Kwon, Dohyeon ^{[1
]}

Lee, Bongwan ^{[2
]}

Kim, Jungwon ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Sch Mech & Aerosp Engn, Daejeon 34141, South Korea

[2] FiberPro Inc, Daejeon 34101, South Korea

来源：

OPTICS LETTERS | 2019年 / 44卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

TIMING JITTER; INTENSITY NOISE; FREQUENCY COMBS; DISPERSION;

D O I：

10.1364/OL.44.001068

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a robust and low-noise all-polarization-maintaining (PM) nonlinear-amplifying-loop-mirror (NALM) mode-locked Er-fiber laser based on a 3 x 3 coupler. Since the 3 x 3 coupler generates 120-deg phase bias, the 3 x 3 PM-NALM laser can easily acquire mode-locked state even without any additional phase biasing components. In our experiment, the initiation of mode-locking required at least 1.5 times less pump power compared to the similar-structured 2 x 2 PM-NALM laser. The minimum relative-intensity noise (RIN) level reaches -155 dB/Hz with an integrated rms RIN of 0.0022% [10 Hz-1 MHz], which corresponds to one of the lowest integrated relative intensity noise (RIN) from any free-running mode-locked lasers. The laser also features very robust operation against mechanical vibrations. Stable mode-locked operation is maintained for more than 60 min even in continuous 1.5 grms vibrations. (c) 2019 Optical Society of America

引用

页码：1068 / 1071

页数：4

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