Open AccessRepetition rate stabilization of the SBS Q-switched fiber laser by external injection
Author(s) -
Zhengqing Pan,
Meng Li,
Qing Ye,
Haiwen Cai,
Zujie Fang,
Ronghui Qu
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.003124
Subject(s) - optics , brillouin scattering , repetition (rhetorical device) , duty cycle , fiber laser , materials science , laser , modulation (music) , q switching , frequency modulation , physics , telecommunications , bandwidth (computing) , acoustics , voltage , philosophy , linguistics , quantum mechanics , computer science
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.