Forward transmission distributed sensing device and method based on PGC demodulation

The invention discloses a forward transmission distributed sensing device and method based on PGC demodulation, and the device comprises a light beam isolation noise reduction device, a light beam coupling device, a light beam mixing interference device, a signal conversion device, and a signal processing device. Input optical signals with different wavelengths are subjected to signal processing of isolation noise reduction, coupling, frequency mixing interference, digital signal conversion and a differential cross multiplication algorithm to obtain a vibration phase, so that a vibration position is obtained, the sensitivity of submarine geology monitoring is improved, the anti-electromagnetic interference capability is enhanced, the dynamic sensing range is enlarged, a frequency mixing interference part forms an interference signal, and the dynamic sensing effect is improved. The vibration phase is calculated, and the vibration position of the seabed geology is detected. 本申请公开了一种基于PGC解调的前向传输分布式传感装置及方法，基于PGC解