Optical module

The invention discloses an optical module which comprises a circuit board; a light source; a silicon optical chip, which comprises an MZM, an input optical port, an output optical port and a DMPD, wherein light emitted by the light source enters the MZM through the input optical port, light without carrying signals is modulated into signal light through the MZM, the signal light is divided into output light and monitoring light, the DMPD detects and compares the light intensity of the output light and the light intensity of the monitoring light, the output light is output to the silicon optical chip through the output optical port, and the MZM comprises a heater that is arranged on an interference arm of the MZM; a voltage comparison and conversion circuit, of which the input is connected with the output pin of the DMPD, wherein the voltage comparison and conversion circuit outputs voltage according to the current transmitted on the output pin; an MCU, of which the input is connected with the output end of th