基于半开放腔的可调谐多波长随机光纤激光器研究  

A Tunable Multi-Wavelength Random Fiber Laser Based on Half-Open Cavity

作　　者：黄昌清[1] 刘梦诗 车腾云 韩佳晖 董新永[1] 

机构地区：[1]中国计量学院光学与电子科技学院,浙江杭州310018

出　　处：《中国激光》2016年第3期1-6,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(11404310);浙江省自然科学基金(LY13F050004)

摘　　要：提出了一种具有可调谐特性的半开放腔多波长随机光纤激光器，利用单模光纤和环形结构组成半开放腔结构，通过改变布里渊抽运激光波长实现输出随机激光的可调谐特性。结果表明，当布里渊抽运波长为1550.01 nm时，该激光器最多可以实现4个波长的随机激光输出，且可以通过控制掺铒光纤放大器的输出功率来精确控制输出随机激光波长数目，其一阶至四阶斯托克斯光的阈值功率分别为12、31.6、73、610 mW。其中，一阶斯托克斯光的斜率效率可达12.5%。固定掺铒光纤放大器的输出功率为631 mW 时，随着随机分布反馈光纤长度的增加，随机激光输出功率成指数下降。该激光器的输出波长可在1528～1580 nm 的波长范围内调谐。此外，半开放腔的结构设计有效地消除了输出光谱中奇数和偶数阶斯托克斯光的峰值功率差异。A tunable multi-wavelength random fiber laser, with single-mode fiber and ring structure forming halfopen cavity, has been proposed. Tunable Brillouin pump laser is used to achieve tunable random lasing. The results show that the proposed laser has random lasing with four wavelengths, which can be accurately controlled by the output power of erbium-doped fiber amplifier when Brillouin pump wavelength is 1550.01 nm. The threshold power of the proposed laser from the first Stokes line to the fourth Stokes line are 12, 31.6, 73 and 610 mW, respectively. The slope efficiency of the first stokes wave is 12.5%. For fixed output power of erbium-doped fiber amplifier of 631 mW, the output power of the proposed laser decreases exponentially with lengths of optical fibers as random distributed feedback media. The output wavelength of the random fiber laser can be tuned between 1528 nm and 1580 nm. The scheme of half-open cavity can effectively avoid the peak power difference of odd-order and evenorder Stokes lines.

关 键 词：激光器 受激布里渊散射 瑞利散射 阈值功率 

分 类 号：TN248[电子电信—物理电子学]