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A non-orthogonal polarization multiplexing signal transmission method based on Stokes analysis

A technology of polarization multiplexing and signal transmission, applied in the direction of polarization multiplexing system, etc., to achieve the effect of increasing robustness, avoiding the increase of complexity, and large tolerance

Active Publication Date: 2017-10-24
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

However, all current methods only study the multiplexing methods with polarization angles of 45° and 60°, and the maximum transmission distance is only 2km under laboratory conditions

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  • A non-orthogonal polarization multiplexing signal transmission method based on Stokes analysis
  • A non-orthogonal polarization multiplexing signal transmission method based on Stokes analysis
  • A non-orthogonal polarization multiplexing signal transmission method based on Stokes analysis

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, the method of the present invention consists of one or N non-orthogonal polarization multiplexing intensity modulated optical signals (101 1 ~101 N ), an optical wavelength division multiplexer (102), an optical amplifier (103), a section of optical fiber (104), a wavelength division multiplexer (105), one or N Stokes analyzers (106 1 ~106 N ), four N photoelectric converters (107 1 ~107 4N ) and a digital signal processing unit (108). The transmitter and receiver of the method are simple in structure and low in cost, and are suitable for short-distance transmission access network. The specific logical relationship is as follows: multiple non-orthogonal polarization multiplexing intensity modulated signals (NPDM, 101 1~101 N ) to the central office, it is synthesized by a wavelength division multiplexer (102) into a wavelength ...

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Abstract

The invention discloses a non-orthogonal polarization multiplexing signal transmission method based on Stokes analysis. At the receiving end, the multiplexed signal is first separated into N independent non-orthogonal polarization multiplexed signals by a wave division multiplexer (105), and then each NPDM signal passes through a corresponding Stokes analyzer (106N) The signals are divided into four channels, and then converted into electrical signals by photoelectric converters (1071-1074N), and then enter the digital signal processing unit (108), and finally realize non-orthogonal polarization multiplexing signals by tracking the changes of Stokes parameters recovery. Compared with the traditional orthogonal polarization multiplexing (PDM) method, the non-orthogonal multiplexing signal whose polarization multiplexing angle is larger than a specific small angle in the present invention can be adaptively recovered, which greatly improves the emission in the optical network. The flexibility of the terminal and the receiving end, but also reduces the cost. At the same time, the present invention has greater tolerance to polarization-related loss when it is non-orthogonal, and is more suitable for the access network field of short-distance transmission.

Description

technical field [0001] The invention relates to the field of access networks for short-distance transmission, in particular to a non-orthogonal polarization multiplexing signal transmission method based on Stokes analysis. Background technique [0002] Since ancient times, the development of communication technology has never stopped, from beacon to radio waves, from short-distance transmission to transoceanic communication. However, with the explosive growth of information today, people pay more attention to the speed, distance, economy and effectiveness of information transmission. Therefore, the introduction of optical fiber as a transmission medium has set off a revolution in communication technology. Optical fiber communication has also developed rapidly in the following decades, and has gradually become the cornerstone of modern communication. [0003] Since then, optical fiber communication has ushered in two major developments, each of which is a milestone leap. On...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/06
Inventor 闫连山陈智宇易安林蒋林盘艳潘炜罗斌
Owner SOUTHWEST JIAOTONG UNIV
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