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FBG based seismic vibration sensor with inverted spring-mass system



  1. Department of Physics, National Institute of Technology Warangal, India


In this paper, we report the design of an FBG based seismic vibration sensor with an aid of an inverted spring-mass system to sense the primary waves of seismic vibration. A simple linear edge filter also designed using simple Single mode - Multimode - Single mode (SMS) configuration to interrogate the FBG. The obtained experimental results show that the proposed sensor is capable to measure the frequency of vibrations over the span of 2-20Hz. It is also evident that the designed sensor exhibits high sensitivity at 7.5Hz, which represents the resonance frequency of the sensor. The sensor parameters cane be alter by choosing the spring mass system parameters and the position of the FBG attached between the spring and the post..


Fiber Bragg Grating, Seismic, Primary wave, Inverted Sprint Mass, Vibration sensor, Intensity modulation.

Submitted at: Oct. 26, 2017
Accepted at: Nov. 29, 2018


PUTHA KISHORE, FBG based seismic vibration sensor with inverted spring-mass system, Journal of Optoelectronics and Advanced Materials Vol. 20, Iss. 11-12, pp. 601-609 (2018)