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Optical power control method and device

一种光功率控制、功率的技术，应用在光通信领域，能够解决淹没、测试信号减弱等问题，达到保证正常进行、避免信号强度减弱的效果

Active Publication Date: 2015-07-29
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problem that the test signal is weakened or even submerged due to automatic power control, the present application provides an optical power control method and device, wherein the optical power control device may specifically be a light source driver, an optical transceiver module or an optical line terminal

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  • Optical power control method and device

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Embodiment Construction

[0016] The technical solution provided by the present application will be described in detail below in conjunction with specific embodiments.

[0017] In order to solve the problem that the OTDR test signal is weakened or even submerged due to the automatic control of the output optical power by the APC loop in the prior art, this application proposes to use the APC loop open loop / closed loop seamlessly in the optical transceiver module of the optical line terminal Switch and control the bias current of the light source (such as a laser), so that the light source bias current of the optical transceiver module remains constant during the OTDR test, thereby ensuring the signal strength of the OTDR test signal during the OTDR test, effectively solving the problem of the OTDR test. The signal may be significantly weakened or even drowned out due to automatic power control.

[0018] In order to better understand the present invention, the structure of a passive optical network (PON...

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Abstract

The present application provides a method for controlling optical power, the method includes: monitoring output optical power of an optical source, and judging whether a preset test control signal is received; when the preset test control signal is not received, modulating a data signal to output light of the optical source, and adjusting a bias current of the optical source according to an output optical power monitoring result of the optical source to implement automatic power control; and when the preset test control signal is received, starting a test and superimposing a test signal to the data signal to form a superimposed signal and modulating the superimposed signal to the output light of the optical source, the output optical power monitoring result of the optical source is ignored during the test period to maintain the bias current of the optical source at a preset target value. The present application further provides an apparatus for controlling optical power.

Description

technical field [0001] The present application mainly relates to optical communication technology, and in particular, relates to an optical power control method and device for a passive optical network. Background technique [0002] As "optical access copper retreat" has gradually become the mainstream access method of network technology, the application of optical access technology has been vigorously developed. Passive Optical Network (PON) technology is an optical access technology based on Point to Multi Point (P2MP). Generally speaking, a passive optical network system mainly includes optical A line terminal (Optical Line Terminal, OLT), a plurality of optical network units (Optical Network Unit, ONU) on the user side, and an optical distribution network for distributing or multiplexing data signals between the OLT and the ONU. [0003] In order to ensure the power budget of the network link, the data transmission part of the optical line terminal usually adopts an aut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/00H04B10/08
CPCH04B10/071H04B10/564G01M11/3109H01S5/042H01S5/0683H04B10/40H04B10/07
Inventor 钟德刚杨素林李胜平李泽彬
Owner HUAWEI TECH CO LTD