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A Phase Noise Estimation Method and Signal Compensation Method for Multicore Optical Fiber

A phase noise, multi-core fiber technology, applied in the field of optical communication, can solve the problem of inaccurate evaluation of multi-core fiber phase noise, and achieve the effect of ensuring accuracy

Inactive Publication Date: 2021-03-26
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a phase noise estimation method and a signal compensation method of a multi-core optical fiber to solve the technical problem of inaccurate evaluation of the phase noise of a multi-core optical fiber

Method used

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  • A Phase Noise Estimation Method and Signal Compensation Method for Multicore Optical Fiber
  • A Phase Noise Estimation Method and Signal Compensation Method for Multicore Optical Fiber
  • A Phase Noise Estimation Method and Signal Compensation Method for Multicore Optical Fiber

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Embodiment 1

[0032] A phase noise estimation method 100 of a multi-core optical fiber, such as figure 1 shown, including:

[0033] Step 110: Calculate the variance of the laser phase noise based on the laser phase noise model and the linewidth of the laser used in the multi-core optical fiber communication system;

[0034] Step 120: Calculate the variance of the crosstalk phase noise based on the variance of the laser phase noise, where the variance of the crosstalk phase noise is proportional to the variance of the laser phase noise;

[0035] Step 130: Based on the crosstalk model of the multi-core fiber, construct a multi-dimensional oblique variance matrix corresponding to the multi-core fiber as the variance of the phase noise of the multi-core fiber, wherein the diagonal element of the matrix is ​​the variance of the laser phase noise, The corner element is the variance of the crosstalk phase noise;

[0036] Step 140: Calculate the phase noise of the multi-core optical fiber based o...

Embodiment 2

[0061] A multi-core optical fiber signal compensation method, comprising: estimating the phase noise of the multi-core optical fiber by adopting any of the multi-core optical fiber phase noise estimation methods described in the first embodiment; and compensating the optical fiber signal based on the phase noise.

[0062] In optical fiber communication, phase noise will seriously degrade signal quality. Phase noise compensation is an important part of signal processing DSP at the receiving end. The phase noise compensation effect is closely related to the phase noise evaluation. The more accurate and realistic the phase noise evaluation is, the better the effect of the phase noise compensation scheme obtained. The traditional phase noise is mostly approximated by the Wiener model, which has an excellent fitting effect for single-core fiber communication, but not for multi-core fiber. Therefore, it is of great significance to establish a phase noise model suitable for multi-co...

Embodiment 3

[0064] A storage medium, storing instructions in the storage medium, when a computer reads the instructions, the computer is made to execute any method for estimating phase noise of a multi-core optical fiber as described in the first embodiment above and / or the above embodiments A multi-core optical fiber signal compensation method described in 2.

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Abstract

The invention belongs to the field of optical communication, and particularly relates to a phase noise estimation method for a multi-core optical fiber and application of the phase noise estimation method, the estimation method comprises the following steps: calculating variance of laser phase noise based on a laser phase noise model and line width of a laser adopted in a multi-core optical fibercommunication system; based on the variance of the laser phase noise, calculating the variance of the crosstalk phase noise, wherein the variance of the crosstalk phase noise is in direct proportion to the variance of the laser phase noise; based on the crosstalk model of the multi-core optical fiber, constructing a multi-dimensional orthorhombic variance matrix corresponding to the multi-core optical fiber to serve as the variance of the phase noise of the multi-core optical fiber, diagonal elements of the matrix being the variance of the phase noise of the laser, and non-diagonal elements ofthe matrix being the variance of the crosstalk phase noise; and calculating to obtain the phase noise of the multi-core optical fiber based on the multi-dimensional orthorhombic variance matrix. According to the invention, the inter-core crosstalk of the phase noise of different fiber cores in the multi-core optical fiber is considered, the accuracy is high, and an efficient premise is provided for the compensation of the phase noise of the multi-core optical fiber.

Description

technical field [0001] The invention belongs to the field of optical communication, and more particularly, relates to a phase noise estimation method and a signal compensation method of a multi-core optical fiber. Background technique [0002] At present, the spectral efficiency in the field of communication has always been the focus of researchers. Among them, the space division multiplexing technology can double the transmission capacity of the system by using multi-core fiber and multi-mode fiber technology, which in turn can improve the spectrum of the optical communication system. efficiency. However, as a phase damage model that seriously affects the transmission performance of the optical communication system, a lot of research has been done on the phase damage model of the single-core fiber, and the phase noise model of the laser is generally used as the phase noise model of the single-core fiber. However, although a lot of research has been done in single-core fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/61H04B10/079
CPCH04B10/0795H04B10/6165
Inventor 杨柳罗风光王小波杨帅龙杜宇霆王梓霖刘家铭
Owner HUAZHONG UNIV OF SCI & TECH
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