Optical module of in-band pass through monitoring signal based on amplitude modulation

Abstract

The present invention discloses an optical module of an in-band pass through monitoring signal based on amplitude modulation, belonging to the field of communication technology. The optical module comprises a low speed baseband amplitude modulation circuit, a laser driving circuit, a laser, an electro-absorption signal modulation circuit, an electro-absorption modulator, an avalanche photodiode, a transconductance amplifier, an amplitude limiting amplifier, a mirror current circuit, and a low-frequency demodulation circuit. Compared with a conventional optical module, according to the optical module of the invention, a monitoring signal is loaded to the envelope of a bearing service signal through amplitude modulation and shares cable and channel resources with a bearing service signal, the channel resource is saved, the monitoring signal of the pass through is unrelated to a bearing service signal protocol, and the use flexibility is high. Since a low speed baseband signal amplitude modulation and demodulation unit is integrated in the optical module, the additional adding of an optical function unit is not needed, the pass through of the monitoring signal can be realized, and the optical module is a most cost-effective solution for an application scene with the need of monitoring signal transmission.

Description

technical field [0001] The present invention relates to the field of communication technology, especially to the field of communication such as optical transmission network, mobile fronthaul, mobile backhaul, fixed broadband access, special line access for VIP customers, and in particular to an optical monitoring signal based on amplitude modulation in-band transparent transmission. module. Background technique [0002] The continuous expansion of the transmission capacity and the continuous improvement of the speed of the main line of the communication network make the optical fiber communication the main transmission means of the modern information network. In the current optical communication network, as one of the core optoelectronic devices, there are more and more types of optical transceiver modules, the requirements are higher and higher, and the complexity is also developing at an alarming speed. [0003] At the same time, more and more fiber optic communication ap...

AI Technical Summary

Problems solved by technology

[0004] The traditional optical transceiver module does not have the function of transmitting service signals and monitoring signals at the same time, so that operators have to add additional optical cables and channel resources in various application scenarios that need to transmit monitoring signals, and have to add additional optical transceiver modules and splitting and multiplexing Equipment, these have brought problems to operators such as rising investment costs, low spectrum utilization, inconsistent multi-standards and multi-protocols, expensive equipment, etc.

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