Hi GAYATHRI,
I think you have to go to next step of the sensor.
I mean the vibrational signal will change what in the fiber??
let us say, it will change the loss level, so the output power will fluctuate according to the vibrational signal.
so you can design your system in such a way that, make the output power is dependent on a variable (global variable for example) representing the output power!
Hope that is clear to you and helpful,
thanks
Mohamed Abouseif
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