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Bi-directional single fiber optical module and optical path detection method

An optical path detection and single-fiber bidirectional technology, which is applied in transmission monitoring/testing/fault measurement systems, electromagnetic wave transmission systems, electrical components, etc., can solve problems affecting business, reduce operating costs, shorten operation and maintenance, and alarm the effect of time

Active Publication Date: 2012-04-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a single-fiber bidirectional optical module and an optical path detection method to overcome the defects that affect the service when the optical transmitter with the original service wavelength is reused for detection

Method used

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  • Bi-directional single fiber optical module and optical path detection method
  • Bi-directional single fiber optical module and optical path detection method
  • Bi-directional single fiber optical module and optical path detection method

Examples

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Effect test

Embodiment 1

[0061] In order to avoid the wavelength of the uplink and downlink services, the optical path detection is performed using light of a third wavelength different from the wavelength of the uplink and downlink services.

[0062] like image 3 As shown, the device is in the original BOSA (Bi-directional Optical Sub Assembly, single-fiber bidirectional optical module) composed of the first downlink optical transmitter Tx0, the first wavelength division multiplexing filter WDM0 and the first optical receiver Rx0 ) structure, a control unit, a light guide, a second downlink optical transmitter Tx1 of a third wavelength (such as 1625nm), a second wavelength division multiplexing filter WDM1 and a second optical receiver Rx1 are added. The WDM1 guides the light of the third wavelength, so that the service light does not enter the light guide. Through the newly added control unit, the optical path detection can be controlled and corresponding data processing can be performed. Wherein...

Embodiment 2

[0068] like Figure 4 As shown, on the basis of the structure of the above-mentioned first embodiment, the interrelationship of these devices is clarified.

[0069] The MAC chip of the OLT is connected to the optical module through four connecting lines, in which Tx0 Data and Tx0 Disable control the first downstream optical transmitter Tx0 through the first laser driver, while the connecting line Rx is locked through the LIA (Lock-In Amplifier) Amplifier) ​​and TIA (Transimpedance Amplifier, Transimpedance Amplifier) ​​to receive the data received by the first optical receiver Rx0, and the MAC chip of the OLT is connected to the control unit in the optical module through the OTDR connection line, which is used to start / stop the OTDR The control unit in the optical module is used to execute the command sent by the OLT MAC chip and perform data processing on the reflected light of the optical path detection light sent by the received Rx1 to obtain the OTDR data. Transfer it to ...

Embodiment 3

[0072] like Figure 5 As shown, in this embodiment, the device adds a control unit to the original BOSA structure composed of the first downlink optical transmitter Tx0, the first wavelength division multiplexing filter WDM0 and the first optical receiver Rx0 , a second wavelength division multiplexing filter WDM1, an optical splitter, a second downstream optical transmitter Tx1 for emitting optical path detection light of a third wavelength (eg, 1625 nm), and a second optical receiver Rx1.

[0073] The transmission process of its upstream and downstream business light is as follows: the first downstream optical transmitter Tx0 will send out a downlink business light with a wavelength of 1490nm for GPON or EPON, and a downlink business light with a wavelength of 1577nm for XG-PON or 10G-EPON. , through the first wavelength division multiplexing filter WDM0, the second wavelength division multiplexing filter WDM1 and the optical splitter to be guided to the optical fiber interf...

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Abstract

The invention discloses a bi-directional single fiber optical module and an optical path detection method. The optical path detection method is applied to the bi-directional single fiber optical module and comprises the following steps: after a sense command sent from an optical line terminal managing the optical module is received by an optical path detection interface on the optical module, transmitting the optical path detection light of wavelength different from the wavelengths of the service uplink light and the service downlink light of the optical line terminal; outputting the optical path detection light to an optical fiber interface, and receiving the reflected light of the optical path detection light transmitted from the optical fiber interface; after the reflected light is converted into an electrical signal, carrying out data processing to the electrical signal; and transmitting data obtained after processing to the optical line terminal via the optical path detection interface. The optical path detection method does not disturb normal service operation, the original equipment and light path detection characteristics are organically combined to satisfy the desire of operators that optical fiber faults can be detected with the traditional equipment, operation maintenance and alarm time is greatly shortened, and the operation cost of the operators is reduced.

Description

technical field [0001] The invention relates to an optical network in the communication field, in particular to a single-fiber bidirectional optical module and an optical path detection method. Background technique [0002] With the rapid development of network technology and the popularization of network applications, such as network communication, online shopping and network entertainment, etc. have become a part of modern life, the existing access network copper wire (ie wired) system is far from enough This high-speed and broadband demand, and the passive optical network is broadband and high-speed, environmental protection and energy-saving broadband access technology, is the best candidate to replace the existing access network, it is being used by most operators Accepted and deployed to provide faster and better services to the growing number of communication users. [0003] After the placement and deployment of a large number of passive optical networks, it is neces...

Claims

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Application Information

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IPC IPC(8): H04B10/08H04B10/20H04B10/07H04Q11/00
Inventor 徐继东陆建鑫李长垒李振刚
Owner ZTE CORP
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