Microwave photon phased array radar detection method and system based on optical domain true delay

The invention discloses a microwave photon phased array radar detection method and system based on optical domain true time delay, and the method achieves the optical domain true time delay of laser signals with different wavelengths through an optical time delay module, and achieves the control of a wave beam emission angle through the combination of a wavelength division multiplexing technology and an emission/receiving antenna array. And modulating the target echo signal to another path of laser signals with different wavelengths as carriers to obtain a receiving optical signal, enabling different wavelength components to simultaneously arrive at the coherent receiving module through the optical delay module again, realizing coherent fusion with the reference optical signal in the optical domain, and processing through an algorithm to obtain target information. Based on the optical domain true time delay technology, broadband scanning and signal real-time processing of the phased array radar are achieved,