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利用基于非对称的马赫-曾德尔干涉仪(UMZI)的异质光纤环腔实现了双向双波长多模布里渊激光,激射光与抽运光拍频的中心频率分别约为10.49 GHz和10.54 GHz。实验测量了该结构在不同转速下双向斯托克斯光拍频中纵模的频移量。实验结果表明,频移量随转速线性变化,在实验测量范围内没有观察到闭锁效应,且根据环腔转动时拍频信号频率相对于环腔静止时拍频的频移可以明确判断环腔转动方向,提供了一种实现布里渊光纤陀螺(BFOG)的新思路。实验测得陀螺效应标度为1.0305 kHz/°(.s-1),与理论分析吻合较好。
The bi-directional dual-wavelength multi-mode Brillouin laser is realized with a heterogeneous fiber ring cavity based on the asymmetric Mach-Zehnder interferometer (UMZI). The center frequencies of the lasing and pumping light beat frequencies are about 10.49 GHz and 10.54 GHz. The frequency shift of the longitudinal mode in the two-way Stokes light-beat frequency of the structure at different rotational speeds was experimentally measured. The experimental results show that the frequency shift varies linearly with the speed, and no blocking effect is observed in the experimental measurement range. And according to the frequency shift of the beat frequency when the ring chamber rotates, Direction, provides a new idea to realize Brillouin fiber optic gyro (BFOG). The experimentally measured gyroscopic effect scale is 1.0305 kHz / ° (.s-1), which is in good agreement with the theoretical analysis.