Test method for optical fiber fault in passive optical network (PON) and optical module device

Abstract

The invention discloses an optical module device for testing an optical fiber fault in a passive optical network (PON), which comprises a light transmitter, a light guidance module and a control module, wherein the light transmitter is used for transmitting a downlink working optical signal overlaid with a test signal; the light guidance module is used for transmitting the downlink working optical signal to an optical fiber interface, and an uplink working optical signal which is transmitted from the optical fiber interface and is from a client side and a reflected light signal with a test result are respectively sent to a first optical receiver and a second optical receiver; the control module is used for controlling an optical transmitter to transmit a downlink working optical signal overlaid with the test signal; after the second optical receiver receives the reflected light signal with the test result, the reflected light signal is subjected to digitization processing; and a processing result is sent to an optical line terminal. The invention also provides a corresponding test method. According to the optical module device provided by the invention, the test efficiency of optical fiber faults in a PON can be improved, and the operation and maintenance cost of the optical network can be lowered.

Description

technical field [0001] The invention relates to the field of optical access networks, in particular to a method and device for testing optical fiber faults in passive optical networks. Background technique [0002] The rapid development, maturity and low cost of optical fiber communication technology make the popularization of PON (passive optical network, passive optical network) and fiber-to-the-home a reality. With the advancement of PON network and service deployment year by year, the testing and maintenance of the network has become an issue that operators are increasingly concerned about. At present, the most commonly used optical fiber fault test method is to use an external OTDR (Optical Time Domain Reflector, optical time domain reflector) device with a dedicated wavelength for testing, from the optical port of the OLT (Optical Line Terminal, optical line terminal) to the ONU (Optical Line Terminal). Network Unit (Optical Network Unit) direction, send high-power op...

AI Technical Summary

Problems solved by technology

However, the passive optical functional modules commonly used in the market for optical separation and optical guidance cannot separate and guide the working wavelength signal and test wavelength signal of the same wavelength, which will cause abnormal operation of the optical fiber access system in the PON network, making Inefficient testing for fiber optic faults

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