Generation of Narrow Modes in Random Raman Fiber Laser Based on Multimode Fiber

被引:1
|
作者
Vatnik, Ilya D. [1 ]
Gorbunov, Oleg A. [1 ]
Churkin, Dmitry V. [1 ]
机构
[1] Novosibirsk State Univ, Phys Dept, Novosibirsk 630090, Russia
关键词
random feedback; random laser; Raman fiber laser; ER-DOPED FIBER; SINGLE-MODE; ALL-FIBER; RAYLEIGH BACKSCATTERING; THRESHOLD; SPECTRUM; PHYSICS; PULSE; BEAM;
D O I
10.3390/photonics11010002
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We present a new design of a random Raman fiber laser based on a graded-index multimode fiber as the media composing the cavity that allows the generation of narrow spectral lines. We carried out spectral measurements using an optical heterodyning technique by projecting multimode radiation onto the fundamental mode of a standard single-mode fiber. The measurements confirmed the presence of localized ultra-narrow short-lived modes. We measured the powers of the modes and found it to be significantly higher (up to 25 mW) compared with those in a random Raman laser based on a single-mode fiber (<2 mW), while preserving the same typical lifetimes of a few milliseconds.
引用
收藏
页数:10
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