Joint compensation method and device of mode dependent loss and polarization dependent loss

A polarization-dependent loss and related loss technology, applied in the field of communication, can solve problems such as optical signal-to-noise ratio changes, transmission system deterioration, gain fluctuations, etc.

Active Publication Date: 2015-03-11
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] Although MDM technology is considered to be an important method to improve the capacity of optical networks, the existence of Mode Dependent Loss (MDL for short) and Polarization Dependent Loss (PDL for short) in MDM not only makes optical fiber transmission process Changes in other transmission characteristics also c

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  • Joint compensation method and device of mode dependent loss and polarization dependent loss
  • Joint compensation method and device of mode dependent loss and polarization dependent loss
  • Joint compensation method and device of mode dependent loss and polarization dependent loss

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[0067] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0068] figure 1 A flowchart showing the joint compensation method for mode-dependent loss and polarization-dependent loss provided by Embodiment 1 of the present invention, as shown in figure 1 As shown, the joint compensation method of the mode-dependent loss and the polarization-dependent loss in this embodiment is as follows.

[0069] at the ...

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Abstract

The invention provides a joint compensation method of mode dependent loss and polarization dependent loss. The method comprises the following steps: S1, performing constellation modulation on a bit signal; S2, performing mode polarization time encoding on the signal after the constellation modulation; S3, performing light modulation on the signal after the mode polarization time encoding; S4, performing light polarization beam combination on the signal after the light modulation; S5, performing mode coupling on the signal after the light polarization beam combination; S6, decoupling the signal in mode coupling; S7, performing light polarization beam splitting on the decoupled signal; S8, performing coherent demodulation on the signal after the light polarization beam splitting; S9, performing channel equalization on the signal after the coherent demodulation; S10, performing mode polarization time decoding on the signal after the channel equalization; and S11, performing constellation demodulation on the decoded signal. Through the adoption of the method provided by the invention, the mode dependent loss and the polarization dependent loss in the transmission process can be effectively inhibited, and the system performance is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a joint compensation method and device for mode-dependent loss and polarization-dependent loss. Background technique [0002] With the exponential capacity growth in the past two decades, wavelength division multiplexing has become an important technical form of data optical network. An important reason for this situation is the continuous and rapid increase in data network traffic. However, recent research progress shows that the capacity growth of wavelength division multiplexing optical transmission is obviously slowing down, and its system experiments are rapidly approaching the Shannon limit of nonlinear optical fiber transmission. Mode Division Multiplexing (MDM for short) in few-mode fiber is a brand-new optical multiple-input multiple-output transmission form, and is expected to be an important potential solution to further increase the capacity of optical network...

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Application Information

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IPC IPC(8): H04B10/532H04J14/04H04L25/03
Inventor 高冠军张杰张楷赵永利杨辉
Owner BEIJING UNIV OF POSTS & TELECOMM
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