Apparatus and method for electronic RIN reduction in fiber-optic sensors utilizing filter with group delay

摘要: The invention is directed to an apparatus and a method for reducing noise, in particular RIN optical sensors, fiber-optic sensors. sensor produces output signal representing physical quantity be measured also contains first noise component, which detected by detector. A separate detector detects input light component of the source second component. electronically processed time-delayed filter time delay substantially corresponds experienced traversing sensor. then subtracted from produce reduced corresponding quantity.