Passive compatible optical network and optical-network-unit optical module thereof

Abstract

The invention discloses a passive compatible optical network and an optical module of an optical network unit thereof. In the optical network, an optical module of an optical line terminal is used for transmitting optical signals with a first wavelength and a fourth wavelength as descending optical signals and receiving optical signals with a second wavelength and a fifth wavelength as ascending optical signals, and is also used for sending optical signals for detecting a third wavelength of a breaking point, carrying out sampling and analysis on the reflected optical signals with the third wavelength after the reflected optical signals with the third wavelength are received and determining the positions of the breaking points of optical fiber; and an optical module of the optical network unit is used for the optical signals with the first / fourth wavelength, transmitting the optical signals with the second wavelength / the fifth wavelength and reflecting the optical signals with the third wavelength. The invention has the advantages that since the OLT can be used for transmitting and receiving the optical signals with the third wavelength for detecting the breaking points when the transmission of the ascending and descending signals is not influenced, and the ONU (Optical Network Unit) optical module can reflect the optical signals for detecting the breaking points, so that the detection of the breaking points of the optical fiber is more convenient.

Description

technical field [0001] The invention relates to optical fiber communication technology, in particular to a passive compatible optical network and an optical network unit optical module thereof. Background technique [0002] In the optical fiber communication system, the optical transmission medium, such as optical fiber / optical cable, is often laid on the outskirts or on the seabed, and problems such as link failure or transmission equipment failure are inevitable. In order to accurately locate the location of the failure or breakpoint, the optical Time domain reflectometer (OTDR) for breakpoint detection. [0003] in such as figure 1 In the optical fiber communication system shown, OLT (Optical Line Terminator, optical line terminal) is usually installed in the central office of the access network system of the optical fiber communication system, and the OLT is responsible for converting the electrical signal data in the switch into optical signal data and sending it out. ...

AI Technical Summary

Problems solved by technology

[0006] In the existing optical fiber breakpoint detection method, the system network has to be disconnected first during the breakpoint detection process, and then connected to the OTDR for detection. The detection process is complicated, which makes the detection work of the detection personnel cumbersome

[0007] Moreover, during the detection period, it will also affect the normal transmission of signals of other networks without breakpoints

For example, in the above example, only the optical fiber between the spilter and ONU3 is broken. However, during the detection period, the OLT is disconnected from the network, which also causes the signal interruption of ONU1 and ONU2.

[0008] Therefore, in summary, the breakpoint detection method of the prior art will affect the normal transmission of the signals of other networks without breakpoints during the breakpoint detection process; and the detection process is complicated, making the detection work of the detection personnel cumbersome

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