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Device and method for recognizing spectrum amplitude code mark through frequency sweeping coherent detection

A spectral amplitude code and optical marking technology, applied in the field of optical communication, can solve the problems of difficult implementation, complicated design and operation of marking identification unit, large optical loss, etc., and achieves reduction of system complexity and implementation cost, and strong practical operability. , the effect of eliminating the splitting loss

Inactive Publication Date: 2011-11-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing SAC label switching network, the design and operation of the label recognition unit is complicated, the light splitting loss is too large, the cost is too high, and the implementation is difficult, etc., and a method of using coherent detection technology to identify A new method of SAC optical label exchange, so that the label recognition unit can avoid the loss of light splitting, the system structure is simple, and the implementation cost is low

Method used

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  • Device and method for recognizing spectrum amplitude code mark through frequency sweeping coherent detection
  • Device and method for recognizing spectrum amplitude code mark through frequency sweeping coherent detection
  • Device and method for recognizing spectrum amplitude code mark through frequency sweeping coherent detection

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Embodiment Construction

[0025] Below according to accompanying drawing and example the present invention will be described in further detail:

[0026] Such as figure 1 Schematic diagram of the frequency-sweeping coherent detection SAC marker recognition unit shown. After the SAC optical marker and the frequency-sweeping local oscillator light source are mixed, the coherent detection technology and the balanced detection receiver are used to realize the identification of the SAC marker.

[0027] Based on the frequency-domain coded SAC optical marker, the present invention uses 4 codewords (f 1 , f 2 , f 3 , f 4 ) "1010" SAC light mark as an example (such as figure 1 (a) shown). The linearly swept LO light source covers all available frequencies (f 1 ~ f 4 ), and the transfer function is f LO (t n ) = f n (where n=1, 2, 3, 4) (such as figure 1 (b) shows the light source signal). After the above two optical signals are mixed by a 3dB coupler, the mixed signal is then filtered by a balanced ...

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Abstract

The invention discloses an information treatment device which is mainly used for the generation, demodulation and reception of optical mark information in an optical mark exchange system, wherein the information treatment device comprises a mark generator, a frequency sweeping local oscillation light source and a mark detection and reception part. The frequency sweeping local oscillation light source mainly realizes the coherent detection recognition of a spectrum amplitude code mark via a distributed feedback laser with frequency demodulated through a sawtooth wave function and receives the mark through a balanced detection method. The spectrum amplitude code mark is recognized through the method, thus a recognition unit structure of the traditional spectrum amplitude code mark can be greatly simplified and the receiving quality of marked signals is improved, and the spectral loss of the system can be reduced effectively and the actual operability of the system is improved.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an implementation method and device for identifying spectrum amplitude code marks based on coherent detection technology. Background technique [0002] Since the beginning of the 21st century, with the rapid development of Internet services, the explosive growth of IP data volume and business volume has put forward higher requirements for communication networks. Although the current transmission capacity of the optical communication backbone network has reached the Tb / s level, as an indispensable part of the optical communication network - the switching node still needs to perform optical / electrical / optical conversion and electrical domain processing for data packets. Since the speed of electronic exchange and electronic information processing has reached the limit, this greatly restricts the transmission speed of the existing communication network, resulting in an "electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04Q11/00H04L12/56H04B10/07
Inventor 曹永盛陈福深陈开鑫孙豹胡哲峰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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