In-band unvarnished transmission monitoring signal optical module based on frequency modulation

Abstract

The invention discloses an in-band unvarnished transmission monitoring signal optical module based on frequency modulation, and belongs to the technical field of communication. The optical module comprises a low-speed frequency modulation circuit, a laser drive circuit, a laser, an electric absorption signal modulation circuit, an electric absorption modulator, an avalanche photodiode, a transconductance amplifier, an amplitude-limiting amplifier, an image current circuit, and a low-speed frequency demodulation circuit. Compared with a conventional optical module, the optical module provided by the invention enables a monitoring signal to be loaded to a carried service signal envelope through frequency modulation, shares optical and channel resources with a carried service signal, and saves the channel resources. Moreover, an unvarnished transmission monitoring signal is not related with a carried service signal protocol, so the optical module is high in use flexibility. The interior of the optical module is integrated with a low-speed baseband signal modulation and demodulation unit, so the optical module can achieve the unvarnished transmission of the monitoring signal with no need of an additional optical function unit, and is the optimal solution to the application scenarios where the monitoring signal needs to be transmitted.

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 frequency modulation for 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 communicatio...

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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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