Light module

Abstract

The application provides a light module. The light module comprises a circuit board, a lens module, a filtering reflector plate, an LD and a PD; the LD and the PD are adhered on a first surface of thecircuit board, light-exiting power of the LD is greater than the allowed light power of the transmission of an optical fiber; the filtering reflector plate is embedded in the lens module, the lens module is covered above the LD and the PD, and a projection region, on the circuit board, of the filtering reflector plate covers the PD; the filtering reflector plate comprises an attenuation part anda wave combining film; the wave-combining film is adhered on the side of the attenuation part and towards the PD; the beam emitted by the LD is reflected to the attenuation part through the lens module, the beam attenuated by the attenuation part irradiates into the optical fiber through the wave-combining film; and the beam from the optical fiber is reflected to the PD through the wave-combiningfilm. The LD emitted beam penetrating through the filtering reflector plate and the beam to be irradiated into the filtering reflector plate from the optical fiber are located in the same light path,thereby realizing a function of sharing one optical fiber by the beam emitted by the LD and the beam to be received by the PD, the single-fiber bidirectional function is realized, and the optical fiber utilization efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of optical communication, and in particular to an optical module. Background technique [0002] In optical communication technology, optical signals are used as information carriers for high-speed, long-term, and reliable information transmission. As the core component in the field of optical communication, the optical module is used to convert between optical and electrical signals. [0003] The optical module includes a series of components, the most important of which are LD (Laser Diode, semiconductor laser), PD (Photo-Diode, photodiode), lens components, circuit boards, etc. Usually, one end of the optical module is connected to the host computer through a golden finger, and the other end is connected to the optical fiber ribbon. The circuit board in the optical module receives the electrical signal sent by the host computer through the golden finger, and the LD converts the electrical infor...

AI Technical Summary

Problems solved by technology

This will cause the utilization rate of the fiber optic ribbon to be relatively low

Images