Repetition rate stabilization of the SBS Q-switched fiber laser by external injection.
Repetition rate fluctuation is one of the main drawbacks of the low-threshold stimulated Brillouin scattering (SBS) Q-switched fiber laser. A method to stabilize the repetition rate is proposed in this paper by injecting a square-wave modulated light. It is measured experimentally that variance of the repetition rate can be improved from ~20% to ~1% of the period. It is also found that effectiveness of the method depends on modulation frequency and duty cycle of the injection. Its working mechanism is analyzed qualitatively.
Pan
Zhengqing
Z
Lab of Information Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, PR China. blitheforest@yahoo.com
Meng
Li
L
Ye
Qing
Q
Cai
Haiwen
H
Fang
Zujie
Z
Qu
Ronghui
R