Optical communication device and optical signal processing method

The invention discloses an optical communication device and an optical signal processing method. The optical communication device comprises two optical transmitting devices and two optical receiving devices, and further comprises an optical path assembly and an optical fiber adapter. A first convergent lens packaged in the light emitting device converges light beams emitted by the light source and then provides the light beams to the light path assembly. A second convergent lens packaged in the light receiving device converges light beams from the light path assembly and then provides the light beams to the photoelectric detection element. The light transmitting device and the light receiving device can converge the light beams, so that more lenses do not need to be arranged in the light path assembly to build a complex light path to realize light transmission, and the material cost of the light communication device is saved. And by simplifying the light path, the complexity of the light path is reduced, and the process cost is saved. Besides, by reducing the use number of the lenses, the optical coupling dimensions among all the structural members in the device are correspondingly reduced, and the production efficiency of the Combo PON product is further improved.