设计了一种基于环形腔的双倍布里渊频移间隔的可调谐光纤激光器实验装置。该实验装置由一个3 dB 耦合器、一台可调谐激光源（TLS）、一台980 nm 泵浦和一个实现双倍布里渊频移环形腔构成。该结构耦合输出偶数阶 Stokes 光，从而实现间隔约为20 GHz 或0．16 nm的多波长输出。并研究了980 nm 泵浦光和 BP 光功率对输出偶数阶 Stokes 光波数的影响。当980 nm 泵浦功率固定为26 dBm（400 mW），BP 功率为10 dBm 时，获得了间隔为0．16 nm 的11个稳定激光输出以及36 nm（1530～1566 nm）的可调谐范围。%A tunable multi-wavelength Brillouin fiber laser with double Brillouin frequency spacing based on ring cavi-ty is demonstrated.The Brillouin fiber laser consists of a 3 dB-coupler,a tunable laser(TLS),a 980 nm pump laser di-ode,and a ring cavity to generate double-Brillouin frequency spacing.The multi-wavelength optical signal with about 20 GHz or 0.1 6 nm frequency spacing is achieved by removing the even-order Stokes lines.The effects of BP optical power and 980 nm pump power on the number of Stokes are studied.The power of 980 nm pump laser and BP are fixed at 26 dBm (400 mW)and 1 0 dBm,1 1 stable output channels with 0.1 6 nm spacing and the tuning range from 1 530 nm to 1 566nm are obtained.
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