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Non-orthogonal polarization division multiplexing (NPDM) signal transmission scheme based on Stokes analysis

A technology of polarization multiplexing and signal transmission, applied in polarization multiplexing systems and other directions, to avoid the increase of complexity, increase robustness, and reduce algorithm complexity

Active Publication Date: 2015-08-26
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

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

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  • Non-orthogonal polarization division multiplexing (NPDM) signal transmission scheme based on Stokes analysis
  • Non-orthogonal polarization division multiplexing (NPDM) signal transmission scheme based on Stokes analysis
  • Non-orthogonal polarization division multiplexing (NPDM) signal transmission scheme 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 scheme 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 this solution 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 waveleng...

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Abstract

The invention discloses a non-orthogonal polarization division multiplexing (NPDM) signal transmission scheme based on a Stokes analysis. At a receiving end, multiplexing signals are, first of all, separated into N independent NPDM signals through one wavelength division demultiplexer (105), then each NPDM signal is divided into four signals through a corresponding Stokes analyzer (106<N>), then after being respectively converted into electric signals by photoelectric converters (107<1>-107<4N>), the signals enter a digital signal processing unit (108), and finally, the NPDM signals are recovered through tracking the change of Stokes parameters. Compared to a conventional orthogonal polarization division multiplexing (PDM) scheme, the NPDM signal transmission scheme provided by the invention has the following advantages: the non-orthogonal division multiplexing signals whose division multiplexing angles are greater than some specific small angles can be adaptively recovered, the flexibility of the emitting end and the receiving end in an optical network is greatly improved, and at the same time, the cost is also decreased. At the same time, the non-orthogonal characteristic enables the scheme to have greater tolerance for polarization correlation loss, and therefore, the scheme is better applied to the field of an access network with 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 scheme 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...

Claims

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Application Information

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Patent Type & Authority Applications(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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