Optical module for optical network unit

Abstract

The invention discloses an optical module for an optical network unit, comprising a response current detection module and an MCU (micro-program control unit). The current input end of the response current detection module is connected with the cathode of a photodiode in the optical module. The response current detection module is used for detecting the response current outputted by the photodiode and outputting the corresponding voltage from the voltage output end thereof according to the response current. The voltage input end of the MCU is connected with the voltage output end of the response current detection module. The MCU is used for detecting the voltage outputted by the response current detection module, judging whether to receive the effective optical signal or not and controlling the output of the optical detection signal according to the judgment result. The receiving of the effective optical signal is judged according to the response current generated by the photodiode, and the response current generated by the photodiode is not easy to be affected by power supply and other interference sources, so that the optical detection signal output accuracy is improved greatly.

Description

technical field [0001] The invention relates to optical fiber communication technology, in particular to an optical network unit optical module. Background technique [0002] In the current domestic market and international market, the optical fiber communication direction of high bandwidth, high speed and multi-service integration has begun to be applied; among many solutions, the emergence of fiber-to-the-home (FTTH) is considered to be the ultimate broadband access solution. The domestic market has been widely used. [0003] Among the many FTTH solutions, PON (passive optical network) has attracted much attention and has become the mainstream optical access method at present. PON technology has experienced APON, BPON to the current EPON, GPON in a few years. And with the popularization of Ethernet technology in the metropolitan area network and the development of broadband access technology, people pay more attention to the broadband PON technology above 1Gbit / s, namel...

AI Technical Summary

Problems solved by technology

[0009] In addition, when the noise amplitude of the power supply and ground on the BOX board exceeds 50mV, the noise can pass through the power supply and be introduced by the module TIA, resulting in instability in the non-optical LOS / SD

[0010] Therefore, the light detection signal output method in the prior art may misjudgment, resulting in the wrong output of the light detection signal

Images