SINGLE-FIBER BI-DIRECTIONAL OPTICAL MODULE AND PASSIVE OPTICAL NETWORK SYSTEM

摘要

The present invention is applicable to the field of communications technologies and provides a single-fiber bidirectional optical module and a passive optical network system that uses the single-fiber bidirectional optical module. The single-fiber bidirectional optical module includes a sending module, a receiving module, and a coupler, where the sending module is configured to send a downlink optical signal and a test optical signal that have a first wavelength; the receiving module is configured to receive an uplink optical signal having a second wavelength and receive a backward optical signal that has the first wavelength and is generated correspondingly by the test optical signal during transfer on an optical fiber network; and the coupler is configured to transmit the downlink optical signal and the test optical signal that have the first wavelength to the optical network and reflect the backward optical signal having the first wavelength and the uplink optical signal having the second wavelength to the receiving module. The single-fiber bidirectional optical module provided in the present invention has a simple structure and is easy to manufacture at a low cost.