摘要
提出一种基于反馈光纤环(FFL)的多波长布里渊掺铒光纤激光器(Mw-BEFL)。主腔由光环形器构成单通谐振腔,长度为50m,而FFL选用传统单纵模布里渊光纤激光器的光纤,长度为10m,以保证每一阶斯托克斯波及反斯托克斯波处于单纵模运行状态,并添加恒温系统消除外界干扰。采用延时干涉法,测得第一阶斯托克斯有45dB的边模抑制比和3.23kHz的线宽,通过调节不同的掺铒光纤放大器(EDFA)功率,对比分析了每一阶斯托克斯波和反斯托克斯波的关系。利用级联受激布里渊散射和四波混频效应,最终获得了50nm(1520-1570nm)可调范围的间隔为0.084nm的15个稳定输出的多波长布里渊掺铒光纤激光器。
A novel multiwavelength Brillouin-erbium fiber laser (MW-BEFL) based on the feedback fiber loop (FFL) is proposed. The main single pass ring is constructed by an optical circulator and a 50 m single mode fiber (SMF). In order to guarantee the single longitudinal mode operation of each Stokes waves and anti-Stokes waves, the FFL is configured with a 10 m SMF of traditional Brillouin-fiber laser. The system is enclosed in temperature control system so that environment disturbance is reduced. 45 dB sidemode suppression and 3.23 kHz linewidth of the first-order Stokes wave are measured by delay interference method. Through the cascaded stimulated Brillouin scattering (SBS) and degenerate four-wave mixing (FWM) process, the laser can be freely and steadily tuned in 50 nm range from 1525 nm to 1575 nm with 0. 084 nm wavelength spacing.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2014年第2期199-203,共5页
Chinese Journal of Lasers
基金
国家973计划(2010CB327603
2012CB315704)
国家杰出青年科学基金(61205061)