光子学报, 2016, 45 (3): 0314001, 网络出版: 2016-04-01
布里渊-掺铒光纤随机光纤激光器输出特性分析
Output Characteristics of Brillouin-Erbium Random Fiber Laser
光纤激光器 受激布里渊散射 瑞利散射 掺铒光纤 随机分布反馈 混合增益 线宽 Fiber laser Stimulated Brillouin scattering Rayleigh scattering Erbium-doped fiber Random distributed feedback Hybrid gains Linewidth
摘要
设计了一种基于受激布里渊散射和掺铒光纤混合增益的随机光纤激光器,该激光器选用两段长为20 km的单模光纤组成全开放腔结构,利用单模光纤的瑞利散射提供随机光反馈.研究表明,固定布里渊泵浦波长和泵浦功率分别为1 550.00 nm和2.19 mW时,增加掺铒光纤泵浦功率,可以实现两个波长的随机激光输出,一阶和二阶受激布里渊散射光与布里渊泵浦光波长间隔分别约为0.088 nm和0.174 nm,产生一阶和二阶受激布里渊散射对应的掺铒光纤泵浦功率分别为190 mW和370 mW;当掺铒光纤泵浦功率为433 mW时,激光器两端的最大输出功率为1.60 mW和1.68 mW.当掺铒光纤泵浦功率明显高于阈值功率时,获得的一阶和二阶随机激光输出稳定,3 dB线宽约为0.022 nm,峰值强度和位置基本不随时间而变化.
Abstract
A random fiber laser with stimulated Brillouin scattering (SBS) and erbium-doped fiber (EDF) as hybrid gains was proposed and experimently investigated. Two spools of 20 km long single-mode fibers were used to form a full-open cavity and provide random optical feedback by Rayleigh scattering. For fixed Brillouin pump wavelength and pump power of 1550.00 nm and 2.19 mW, the proposed laser can achieve random lasing of two wavelengths with frequency downshift of about 0.088 nm and 0.174 nm relative to the Brillouin pump wavelength when EDF pump power increases. EDF pump powers corresponding to the 1st and 2nd SBS are 190 mW and 370 mW, respectively. Maximal output powers of two ends are 1.60 mW and 1.68 mW when EDF pump power is 433 mW. When EDF pump power is obviously higher than the threshold power, the output lasing has 3 dB linewidth of about 0.022 nm and keeps stable. The peak intensity and wavelength have no observable fluctuations over time.
黄昌清, 刘梦诗, 车腾云, 董新永. 布里渊-掺铒光纤随机光纤激光器输出特性分析[J]. 光子学报, 2016, 45(3): 0314001. HUANG Chang-qing, LIU Meng-shi, CHE Teng-yun, DONG Xin-yong. Output Characteristics of Brillouin-Erbium Random Fiber Laser[J]. ACTA PHOTONICA SINICA, 2016, 45(3): 0314001.