Patent ID: 8538274

Claim:
An optical relay system, comprising: a first optical signal distribution device, adapted to receive an input signal, divide the input signal into a first path of the input signal and a second path of the input signal, and separately output the first path of the input signal and the second path of the input signal; a phase detection device, adapted to receive the first path of the input signal output by the first optical signal distribution device, extract phase information of the first path of the input signal, convert the phase information to an amplitude modulated signal, and output the amplitude modulated signal; an amplitude regeneration device, adapted to receive the second path of the input signal output by the first optical signal distribution device, shape the second path of the input signal to obtain an amplitude regenerated signal, and output the amplitude regenerated signal; and a phase regeneration and load device, adapted to receive the amplitude modulated signal output by the phase detection device and the amplitude regenerated signal output by the amplitude regeneration device, and load a phase on the amplitude regenerated signal by using the amplitude modulated signal to generate a phase regenerated signal; wherein the phase detection device comprises: a phase detection module, adapted to receive the first path of the input signal output by the first optical signal distribution device, extract the phase information of the first path of the input signal, convert the phase information to the amplitude modulated signal, and output the amplitude modulated signal; and a filter module, adapted to receive the amplitude modulated signal output by the phase detection module, filter out a clutter signal in the amplitude modulated signal, output the amplitude modulated signal without the clutter signal to the phase regeneration and load device.