【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。更多还原

【Abstract】 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.更多还原