Fiber Optic Seismic Sensor

D. L. Gardner; S. L. Garrett

doi:10.1117/12.942518

23 March 1988 Fiber Optic Seismic Sensor

D. L. Gardner, S. L. Garrett

Proceedings Volume 0838, Fiber Optic and Laser Sensors V; (1988) https://doi.org/10.1117/12.942518
Event: Cambridge Symposium on Fiber Optics and Integrated Optoelectronics, 1987, Cambridge, MA, United States

Abstract

A compact seismic sensor has been fabricated by supporting a seismic mass between two fiber-wrapped rubber mandrels which form the two arms of a Michelson interferometer. This sensor has a sensitivity of 104 raft below resonance and 3500 rad/gm above resonance, is easy to fabricate, easy to modifiy for other applications, uses less than fifteen meters of sensing fiber, and has a detection threshold limited by its own intrinsic thermal noise (= 2 μrad/√Hz below resonance) rather than the opto-electronic demodulator noise.

Citation Download Citation

D. L. Gardner and S. L. Garrett "Fiber Optic Seismic Sensor", Proc. SPIE 0838, Fiber Optic and Laser Sensors V, (23 March 1988); https://doi.org/10.1117/12.942518

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