Optical module with strong light protection function

Abstract

The invention discloses an optical module with a blaze protection function. The optical module comprises a light reception assembly used for receiving a light signal, a boost circuit, a current mirror device and an MCU. The boost circuit sends high voltage generated by the boost circuit to a response current output terminal of the light reception assembly through the current mirror device and a current-limiting resistor. The current mirror device receives response current outputted by the light reception assembly, and sends the response current to the MCU after zoom processing. The MCU connects with boost voltage, and adjusts high voltage amplitude outputted by the boost circuit. According to the invention, a high voltage protection circuit is designed at a receiving end of the optical module, so that when a blaze reaches, the light reception assembly is prevented from breakdown and damage, and the optical module is effectively protected. At the same time, through employing a high integrated level transmit-receive one body chip to construct a module circuit, a circuit board dimension is reduced, a SFP interface packaging form is adapted, support of a digital diagnosis function is completed, and maintenance cost of a whole is reduced.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to an optical module that realizes a high-voltage protection function for an optical receiving component when strong light is input at a receiving end. Background technique [0002] Passive optical network technology (PON) is a point-to-multipoint optical access technology. It is the best transmission medium to realize "triple play" and solve the "last mile" of the information highway. Video integrated service access function. The PON system consists of an OLT (Optical Line Termination) at the central office, an ONU / ONT (Optical Network Unit / Optical Network Termination, Optical Network Unit / Optical Network Termination) at the user side, and an ODN (Optical Network Terminal) connected between them. Distribution Network, optical distribution network). Among them, the Ethernet passive optical network EPON is a mature optical passive access network technology...

AI Technical Summary

Problems solved by technology

In the actual application process, when the receiving end of the optical module receives a strong optical signal, the optical receiving component is often damaged due to the lack of high-voltage protection measures in the receiving end circuit, resulting in the failure of the optical module. It affects the normal operation of the passive optical network system, and also brings large economic losses to network managers and customers

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