Hi asif,
If you check the above comments fayiqa has pretty well explained different techniques that we can use like c we an use a Mach-zender inteferometer for removing the effect of the chirp.It can be used to introduce a phase shift in the signal which is opposite to the phase shift introduced by the actual signal.Make sure one arm of the inteferometer recieves the normal input while the other input arm recives the phase shifted version of the same signal.This difference in phase shift can be used to cancel the effect of the phase modulation induced by the chirp in your circuit.
Regards