Re: About Fiber optic gyroscope

praveen wrote:
> Hello,
> I have a doubt regarding fiber optic gyroscope
>
> Relationship between the driving reference voltage and modulation
> index.For example if i want a modulation index of 1.8, how much is the
> reference voltage to be applied to PZT.

This depends on everything--the number of turns, the piezo-optic 
coefficient of the fibre, the wavelength, the size and sensitivity of 
the piezo.  The simplest method is to look at the gyro output on a 
spectrum analyzer, then increase the AC drive to the PZT until the 
carrier disappears.  That corresponds to a modulation index of 2.40(the 
first null of the Bessel function J0).  Further calibration is then trivial.

Cheers,

Phil Hobbs