Design and implementation of the receiver for Raman optical sensing system

This article describes the design and implementation of the receiver to detect weak signal for the Raman sensing system.The receiver use APD(Avalanche Photo Diode) for optical-electronic conversion and amplify the signal using TIA and OP-AMPs.The high voltage for APD is generated by Boost step-up circuit and is adjustable for various APD and temperature condition.It is proved by experiment that the system to meet the requirements of the receiver the Raman fiber sensing system.