Fiber-optic seismometer on the basis of Mach-Zehnder interferometer

•The seismometer based on fiber-optic Mach-Zehnder interferometer is proposed.•The multiturn sensing element allowed to obtain high responsivity.•Possibility of further increase of seismometer sensitivity is discussed. The seismometer based on fiber-optic Mach-Zehnder interferometer is proposed and...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2016-06, Vol.244, p.133-137
Main Authors: Kamenev, Oleg T., Kulchin, Yuri N., Petrov, Yuri S., Khiznyak, Ruslan V., Romashko, Roman V.
Format: Article
Language:English
Subjects:
Acceleration
Actuators
Coiling
Fiber optics
Fiber-optic sensor
Mach-Zehnder interferometer
Mach-Zehnder interferometers
Optical fibers
Seismometer
Seismometers
Vibration
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Summary:•The seismometer based on fiber-optic Mach-Zehnder interferometer is proposed.•The multiturn sensing element allowed to obtain high responsivity.•Possibility of further increase of seismometer sensitivity is discussed. The seismometer based on fiber-optic Mach-Zehnder interferometer is proposed and tested. The sensing element of the seismometer is implemented as a multiturn optical fiber coil which allowed to obtain high responsivity to acceleration 6.1×103V/g in the frequency range 1–20Hz. Stability of the seismometer operation is provided by feed-back control of the interferometer working point. It is experimentally demonstrated that seismometer is able to reliably detect seismic vibration with acceleration amplitude at the level of 10−8g. Possibility of further increase of seismometer sensitivity is discussed.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2016.04.006