双光路迈克尔逊加速度检波器

Michelson Dual-Optic Routes Geophone

研制了一种实用的双光路全光纤迈克尔逊加速度检波器.与单光路结构相比,双光路检波器频带更宽,而且可以实现对检波器敏感元件的横向振动、倾斜和弯曲更好地限制.系统主要包括单模全光纤迈克尔逊干涉仪、简谐振子、信号处理系统.在信号处理过程中采用了交流相位跟踪零差补偿技术(PTAC).实验结果与理论相符合,实测工作频带为0～515 Hz.

This paper describes a Michelson all-fiber acceleration seismic geophone with dual-optic routes. Compared with the single-optic route structure, dual-optic routes geophone exhibits wider frequency response range; meanwhile it also constrains the transverse vibration of the mass, incline and bend of the fiber more efficiently. The seismic geophone consists of Michelson interferometer, sensing element and signal processing system. An alternating current phase tracking （PTAC） homodyne scheme has been used to process output signal of the Michelson interferometer. Experimental results match well with the theoretical prediction; the working frequency band is 5-515 Hz.