Optical network unit (ONU) optical module

Abstract

An optical network unit (ONU) optical module comprises an optical device. The optical device comprises a laser, a wavelength division multiplexer (WDM), a receiver and a reflection device, wherein the laser is connected with the WDM, and the WDM is connected with the reflection device and the receiver. The laser is used for generating and sending optical signals. The WDM is used for separating the optical signals with different wavelengths. The receiver is used for receiving the optical signals. The reflection device reflects optical pulse signals generated by an optical time domain reflectometer (OTDR). The OTDR generates the optical pulse signals and sends the optical pulse signals to a main optical fiber located between an optical line terminal (OLT) and an optical divider and branch optical fibers located between the optical divider and the ONU optical module. The reflection device arranged at the ONU optical module end reflects the optical pulse signals generated by the OTDR, and the OTDR receives the optical pulse signals reflected back from the reflection device to detect the main optical fiber and the branch optical fibers.

Description

technical field [0001] The invention relates to an ONU optical module. Background technique [0002] The invention relates to an optical device network and optical fiber testing technology. Passive optical network refers to an optical distribution network (ODN) that does not contain any electronic devices and electronic power supplies. The ODN is composed of passive devices such as optical splitters (Splitter) composition. A passive optical network includes an optical line terminal (OLT) installed in the central control station, and a batch of supporting optical network units (ONU) installed in the user's premises. The optical distribution network (ODN) between the OLT and the ONU includes optical fibers and passive optical splitters or couplers. Optical Time Domain Reflectometry (OTDR) is to monitor the performance of optical fiber to judge events such as fiber length, fiber attenuation, fiber splicing point, connector or fiber break location. The optical pulse signal is...

AI Technical Summary

Problems solved by technology

[0006] If the above-mentioned OLT system and ONU optical modules are used to arrange the network, the OTDR function of the OLT optical module can only monitor the main fiber between the OLT and the optical splitter, and the optical fiber between the optical splitter and the ONU optical module The branch optical fiber line can only collect noise, so the branch optical fiber line between the optical splitter and the ONU cannot be monitored

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