Optical equalizer and optical signal processing method

The invention provides an optical equalizer and an optical signal processing method, which can meet the requirement of flexibly configuring coefficients in practical application. The optical equalizer comprises a control module, an adjustment module, an optical switch, a first conversion module and a second conversion module. The control module can send a first control signal to the adjusting module and send a second control signal to the optical switch. The adjusting module can adjust the intensity of the optical signal based on the first control signal after receiving the optical signal and the first control signal. And after receiving the adjusted optical signal and the second control signal, the optical switch can send the adjusted optical signal to the first conversion module or the second conversion module based on the second control signal. If the first conversion module receives the adjusted optical signal, the adjusted optical signal is converted into a first electric signal, if the second conversion module receives the adjusted optical signal, the adjusted optical signal is converted into a second electric signal, and the polarity of the second electric signal is opposite to that of the first electric signal.