Non-orthogonal polarization multiplexing phase modulation signal transmission plan based on phase tracking

A phase modulation signal, polarization multiplexing technology, applied in the field of backbone network, can solve problems such as long transmission distance

Inactive Publication Date: 2015-11-18
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

However, all the schemes only study the multiplexing schemes with polarization angles of

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  • Non-orthogonal polarization multiplexing phase modulation signal transmission plan based on phase tracking
  • Non-orthogonal polarization multiplexing phase modulation signal transmission plan based on phase tracking
  • Non-orthogonal polarization multiplexing phase modulation signal transmission plan based on phase tracking

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the scheme of the present invention consists of non-orthogonal polarization multiplexing phase modulation optical signals (101 1 ~101 N ), wavelength division multiplexer 102, optical fiber 103, optical amplifier 104, wavelength division multiplexer 105, one or N optical processing units (106 1 ~106 N ), one or N photoelectric converters (107 1 ~107 N ) and a digital signal processing unit 108; this solution can well compensate the loss and distortion in the transmission process, and is suitable for long-distance backbone network transmission. At the transmitter, 101 1 ~101 N Generate non-orthogonal polarization multiplexing (NPDM) phase modulation (m-PSK) signals of one or N channels of different wavelengths; the NPDM phase modulation signal is synthesized by a wavelength division multiplexer 102 into a wavelength division mult...

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Abstract

The invention discloses a non-orthogonal polarization multiplexing phase modulation signal transmission plan based on phase tracking. In a transmitting end with the serial number of 101<1> to 101<N>, one or N non-orthogonal polarization multiplexing (NPDM) phase modulation (m-PSK) signals with different wavelengths are generated; the NPDM phase modulation signals are combined into a wavelength division multiplexing NPDM signal via a wavelength division multiplexer (102); the multiplexed optical signal is transmitted in an optical fiber (103); an optical amplifier (104) is used for performing power compensation to the transmitted optical signal; an electrical signal received by a receiving end is used to realize demodulation output of non-orthogonal phase modulation signals in a digital signal processing unit (108). Compared with a traditional orthogonal polarization multiplexing (PDM) phase modulation signal plan, a non-orthogonal multiplexing phase modulation signal whose polarization multiplexing angle is greater than a certain specific small angle could be adaptively recovered in the invention, and the signal transmission plan has larger tolerance to polarization dependent loss and is suitable for the field of backbone networks for long-distance transmission. Simultaneously, the plan is compatible with the traditional PDM solution, thereby greatly improving the transmission flexibility of a future backbone network.

Description

technical field [0001] The invention relates to the backbone network field of long-distance transmission, in particular to a non-orthogonal polarization multiplexing phase modulation signal transmission scheme based on phase tracking. Background technique [0002] With the continuous development of today's information society, the general public's demand for information is increasing year by year. In the 30 years of development of the optical fiber communication industry, the system capacity and transmission distance have shown an increase of about ten times every four years. Under this requirement, the dense optical wavelength division multiplexing (DWDM) system currently deployed on a large scale is gradually exhausting its wavelength resources. Compressing optical pulses to improve the efficiency of time-division multiplexing (TDM) systems also has significant limitations. In this context, researchers in optical communication urgently need to find new technologies to im...

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Application Information

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IPC IPC(8): H04J14/02H04B10/548
Inventor 闫连山蒋林陈智宇易安林盘艳潘炜罗斌
Owner SOUTHWEST JIAOTONG UNIV
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