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

被引：0
|
作者：
Kim, Dohyun [1 ]
Lee, Bong-Wan [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：
FIBER LASERS XVI: TECHNOLOGY AND SYSTEMS | 2019年 / 10897卷
关键词：
Ultrafast laser; mode-locked laser; low-noise; nonlinear-amplifying-loop-mirror; HIGH-REPETITION-RATE; INTENSITY NOISE; JITTER;
D O I：
10.1117/12.2508524
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 (2 pi/3) 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.
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页数：6
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