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Autocorrelation light source regeneration-based wavelength division multiplexing coherent reception method

A wavelength division multiplexing and coherent reception technology, applied in the field of wavelength division multiplexing coherent reception based on autocorrelation light source regeneration, can solve the problems of wavelength stability limiting the performance of coherent reception, unable to upload or download services, etc., to achieve good correlation sex, quantity reduction, and demand reduction effects

Active Publication Date: 2011-06-08
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology

The wavelength stability of the light source at the receiving end and the linewidth of the laser greatly limit the performance of its coherent reception. At the same time, for the existing multi-wavelength autocorrelation light source coherent reception method, it may not require such a number of light sources, but it cannot be in the middle Site upload or download services can only be used for point-to-point transmission

Method used

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  • Autocorrelation light source regeneration-based wavelength division multiplexing coherent reception method
  • Autocorrelation light source regeneration-based wavelength division multiplexing coherent reception method
  • Autocorrelation light source regeneration-based wavelength division multiplexing coherent reception method

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Embodiment Construction

[0015] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] Such as figure 1 As shown, it is the autocorrelation light source regeneration system adopted in the embodiment of the present invention, and the initial light source 101 is generated as λ 0 (for the standard dense wavelength division multiplexing channel wavelength, the dense wavelength division service is hereinafter referred to as DWDM) narrow-linewidth light source, the narrow-linewidth light source enters the IQ modulator 103, and is subjected to a frequency of f 0 The modulation of the sinusoidal signal of the clock source 102, by the nature of the Fourier change of the signal:

[0017] X ( e j ( ω + ω 0 ) ...

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Abstract

The invention provides an autocorrelation light source regeneration-based wavelength division multiplexing coherent reception method. The method comprises the following steps: (1) an initial light source is used to generate a plurality of related wavelength light sources; (2) the related wavelength light sources are used as modulating light sources to generate a multipath wavelength division multiplexing signal, and is combined with the initial light source to form a dense wavelength division multiplexing signal which is connected to a link to be transmitted; (3) on an arbitrary site, the initial light source and a wavelength signal to be received are downloaded, the initial light source is amplified and divided into two paths, wherein one path is continuously transmitted on the site, while a plurality of new light sources are obtained once again on the other path; (4) a light source receiving wavelength signal frequency points is obtained by filtering, the light source is extracted and split, wherein one path is used as a coherence resonance light source for coherence receiving, while the other path is used as a modulating light source to reload service on the site; and (5) the data is uploaded via the site after reloading is completed so as to complete the whole process. The method reduces the requirement on lasers, provides high-coherence light sources, and does not influence the performance of a coherent receiving system.

Description

technical field [0001] The invention relates to the coherent receiving part in the wavelength division multiplexing system, specifically a wavelength division multiplexing coherent receiving method based on autocorrelation light source regeneration Background technique [0002] In the coherent receiving system of wavelength division multiplexing, for each wavelength channel, a laser will be used as the light source to modulate the data signal, and at the same time, the light source with the same wavelength will be used as the local oscillator at the receiving end to perform the same signal as the received signal. Coherently complete the receiving process. In existing solutions, each wavelength channel requires two light sources with the same wavelength to complete the sending and receiving functions, which greatly increases the number of light sources in the entire system, thereby increasing the demand for the number of lasers. The wavelength stability of the light source a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02H04B10/148H04B10/61
Inventor 杨超谢德权张新全杨铸
Owner WUHAN POST & TELECOMM RES INST CO LTD
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