In the process of laser communication transmission, the transmitting end converts the electrical signal into an optical signal, and then modulates it to the laser to send a laser beam, which is transmitted through optical fiber. After receiving the optical signal, the receiving end converts it into an electrical signal, which is converted into information after modulation and demodulation. The role of the photoelectric chip is to realize the mutual conversion between the electrical signal and the optical signal. Laser communication is used in the fields of fiber broadband, fiber communication, underwater communication, etc.