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Monitoring method and device for optical signal to noise ratio

A technology of optical signal-to-noise ratio and optical signal, applied in the field of communication, can solve the problem that the signal-to-noise ratio cannot be monitored online, and achieve the effect of good resistance

Active Publication Date: 2014-09-17
CHINA ACADEMY OF INFORMATION & COMM
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Problems solved by technology

[0006] In view of this, the present application provides an optical signal-to-noise ratio monitoring method and device to solve the problem that the signal-to-noise ratio cannot be monitored online

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  • Monitoring method and device for optical signal to noise ratio
  • Monitoring method and device for optical signal to noise ratio
  • Monitoring method and device for optical signal to noise ratio

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the present application clearer, the solutions described in the present application will be further described in detail below with reference to the accompanying drawings and examples.

[0029] In the embodiment of this application, an optical signal-to-noise ratio monitoring method is proposed. Two kinds of filtering information are used to filter and interferometrically measure the optical signal and ASE noise at the transmitting end to obtain a correction value. The information is filtered and delayed interferometry, combined with the corresponding correction value obtained, to obtain the absolute value of the power of the optical signal and ASE noise, and then monitor the OSNR, which has good resistance to the spectral distortion damage of the measured signal, so that it can be accurately monitored online Get the OSNR of the signal under test.

[0030] When the present application is specifically imp...

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Abstract

The invention discloses a monitoring method for the optical signal to noise ratio. Two kinds of filtering information are adopted for carrying out filtering and interferometry on optical signals and ASE noise of a transmitting terminal to obtain correction values and adopted for carrying out filtering and delayed interferometry on monitored channels on optical channel monitoring points to obtain corresponding correction values in a combined mode, then the absolute power value of the optical signals and the absolute power value of the ASE noise are obtained, and therefore the optical signal to noise ratio is monitored. Based on the same inventive concept, the invention further provides a monitoring device for the optical signal to noise ratio. The monitoring device is good in resistance to spectrum distortion damage of monitored signals, and can monitor the optical signal to noise ratio of the monitored signals accurately on line.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a method and device for monitoring an optical signal-to-noise ratio. Background technique [0002] Optical signal-to-noise ratio (OSNR) is one of the key performance parameters for monitoring and evaluating optical communication systems. It is of great value in line fault location, protection switching alarm, damage-aware routing, and system operation and maintenance optimization. [0003] With the improvement of optical signal modulation rate and the application of reconfigurable optical add-drop multiplexer (ROADM) in dense wavelength division multiplexing (DWDM) optical network, based on out-of-band spontaneously emitted large emission (ASE) noise measurement and linear in- The traditional OSNR monitoring method of interpolation is no longer applicable. [0004] However, polarization-assisted measurement OSNR monitoring methods using optical signals and A...

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Application Information

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IPC IPC(8): H04B10/077H04B10/079
Inventor 赖俊森李少晖赵文玉张海懿汤瑞汤晓华吴冰冰
Owner CHINA ACADEMY OF INFORMATION & COMM
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