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Monitoring method and device for optical signal-to-noise ratio in nonlinear region

A technology of optical signal-to-noise ratio and nonlinear region, which is applied in the field of optical signal-to-noise ratio monitoring in the nonlinear region, can solve the problems of complexity and low monitoring precision, and achieve the goal of reducing complexity, high monitoring precision, flexibility and precise complexity Effect

Active Publication Date: 2021-10-26
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] However, the existing optical signal-to-noise ratio monitoring scheme in the nonlinear region is relatively complex, and the monitoring accuracy is low. How to realize flexible and accurate low-complexity OSNR monitoring in the nonlinear region is a problem to be solved

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  • Monitoring method and device for optical signal-to-noise ratio in nonlinear region
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  • Monitoring method and device for optical signal-to-noise ratio in nonlinear region

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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0033] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the drawings, and the related Other details are not relevant to the invention.

[0034] It should be emphasized that the term "comprising / comprising" when used herein refers to the presence of a feature, element, step or component, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0035] Aiming...

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Abstract

The invention provides a monitoring method and device for an optical signal-to-noise ratio in a nonlinear region. The method comprises the following steps: carrying out processing on an output signal of an optical fiber coherent transmission system through a digital signal processor, and acquiring an amplitude histogram and a self-adaptive filter tap coefficient for assisting the calibration of nonlinear noise, wherein the above processing comprises IQ imbalance compensation processing, electric dispersion compensation processing, depolarization multiplexing processing, frequency offset compensation processing, phase damage recovery processing and intersymbol interference equalization processing; extracting a first number of features based on the amplitude histogram from the amplitude histogram, wherein the features based on the amplitude histogram comprise a peak position feature, a standard deviation feature and a peak maximum value feature; and selecting sample data from a data set, weighting and inputting the sample data to a pre-established neural network model for optical signal-to-noise ratio monitoring so as to obtain an optical signal-to-noise ratio monitoring result based on the neural network model, wherein the sample data in the data set comprises the extracted features based on the amplitude histogram and the self-adaptive filter tap coefficient.

Description

technical field [0001] The invention relates to the technical fields of optoelectronics and optical fiber communication, in particular to a method and device for monitoring the optical signal-to-noise ratio in a nonlinear region. Background technique [0002] In practical applications, optical fiber transmission systems usually work in the weak nonlinear region. In a long-distance optical fiber transmission system without dispersion management, the nonlinear noise of the fiber after algorithm compensation and the noise of the amplifier spontaneous emission (AmplifierSpontaneous Emission, ASE) have the same impact on the constellation diagram, so the optical signal-to-noise ratio (OSNR) The estimate of Signal Noise Ratio (OSNR) will be low, so how to accurately monitor the optical signal-to-noise ratio in the nonlinear region has become a research hotspot in optical performance monitoring. Zhenhua Dong et al. of Hong Kong Polytechnic University used the amplitude noise autoc...

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Application Information

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IPC IPC(8): H04B10/079G06N3/08
CPCH04B10/07953G06N3/08
Inventor 于振明万智泉殷秋阳徐坤
Owner BEIJING UNIV OF POSTS & TELECOMM
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