可调谐多波长布里渊随机光纤激光器

Tunable Multiwavelength Brillouin Random Fiber Laser

提出了一种可调谐多波长布里渊随机光纤激光器,其具有半开腔结构,一端利用3dB耦合器构成全反端,另一端利用单模光纤中随机分布的瑞利散射作为反射,经掺铒光纤放大器放大后的布里渊抽运光,在长单模光纤中形成级联的高阶受激布里渊散射,即实现多波长布里渊随机激光输出。实验结果表明:当布里渊抽运波长为1530nm时,从该激光器最多可获得7个斯托克斯波长的随机激光输出;通过改变布里渊抽运功率及掺铒光纤抽运激光功率,研究了功率的大小对多波长随机激光输出的影响。此外,通过改变布里渊抽运激光波长,实现了多波长布里渊随机激光在1515~1565nm范围内的调谐。

We propose a novel tunable multiwavelength random fiber laser based on Brillouin scattering with halfopen cavity,and it′s formed by total reflection of a connected 3 dB coupler and randomly distributed Rayleigh scattering in single mode fiber.When the Brillouin pump power amplified by the erbium-doped fiber amplifier is high enough,it is possible to generate cascaded high-order stimulated Brillouin scattering in the long single-mode fiber and achieve multiwavelength Brillouin random laser output.The results show that when Brillouin pump wavelength is 1530 nm,at best seven multiwavelength Stokes have been obtained from the Brillouin random fiber laser.We study the influence of the pump power on the output of multiwavelength random lasers by changing the Brillouin pump power and erbium-doped fiber pumped laser power.Additionally,by changing the wavelength of Brillouin pump,we find that the output wavelength of the Brillouin random laser can be tunable in wavelength range from1515 nm to 1565 nm.