Design of harmonic oscillator for MOEMS three-component acceleration seismic geophone

Abstract

Abstract:

The harmonic oscillator of three-component acceleration seismic geophone based on photoelastic effect is designed by the methods of inertia force perpendicular to the harmonic oscillator and the differential detection technology. In terms of dual M-Z interferometer of three-component acceleration seismic geophone, equal division of optical power and single-mode transmission of light are the bases of correct acceleration detection. The structure of M-Z interferometer is introduced. The optical field transmission of dual M-Z interferometer in three-component acceleration seismic geophone is simulated by the waveguide optics simulation software OptiBPM v9.0, and the optical field transmission graph of dual M-Z interferometer is gotten. It can be seen from the simulation result that when the light emitted from the laser passes through the dual M-Z interferometer, the optical field peak values of 1/4 branch waveguides all achieve 0.52, and the splitting ratio is 1:1:1:1. The equal division of optical power is realized, and the harmonic oscillator designed meets the demand of proper acceleration detection of three-component acceleration seismic geophone.

Key words: fiber and waveguide optics, harmonic oscillator, M-Z interferometer, photoelastic effect, three-component

CLC Number:

EN De, FENG Jie-yu, ZHANG Ning-bo. Design of harmonic oscillator for MOEMS three-component acceleration seismic geophone[J]. J4, 2012, 29(3): 362-367.

References

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