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Optical communication multichannel multiplexing method and system based on chromatic dispersion matching

A multiplexing and optical communication technology, applied in the field of optical communication, can solve problems such as misjudgment and bit error, and achieve the effects of offsetting multi-user interference, preventing beat frequency noise, and increasing the number of multiplexing of the same optical path

Inactive Publication Date: 2011-05-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the number of multiplexed users increases, the multi-user interference will increase, and if it reaches the threshold, it will misjudgment and cause a bit error

Method used

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  • Optical communication multichannel multiplexing method and system based on chromatic dispersion matching
  • Optical communication multichannel multiplexing method and system based on chromatic dispersion matching
  • Optical communication multichannel multiplexing method and system based on chromatic dispersion matching

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Embodiment Construction

[0026] Such as figure 1 As shown in , an optical communication multiplexing system based on dispersion matching includes several encoders, an all-optical network and several decoders, such as figure 2 As shown, each encoder is composed of a data modulation unit and a dispersion unit, such as Figure 4 As shown, each decoder is composed of a dispersion matching unit and a differential detection unit, and the dispersion unit and the dispersion matching unit have dispersion coefficients with the same or similar values ​​and opposite positive and negative. If the dispersion coefficient of a decoder dispersion matching unit of an optical communication system is equal or approximately equal to the dispersion coefficient of one of the encoder dispersion units, and the signs are opposite, it is called matching.

[0027] The input of the data modulation unit is the data electrical signal or data optical signal to be sent, and the output is the original optical pulse sequence signal; ...

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Abstract

A multipath-multiplexing method of optical communication based on dispersion match includes intensifying identification ability of different channel transmission signal on the same optical path by optical communication system for raising multiplex number of the same optical path by carrying out dispersion match on transmission signal and utilizing differential detection to eliminate off interference between multi-channel users. The system used for realizing said method is also disclosed.

Description

technical field [0001] The present invention relates to an optical communication technology, in particular to an optical communication multiplexing method and system based on dispersion matching. Background technique [0002] Optical communication technology, mainly optical fiber communication technology, has the characteristics of high capacity, high bandwidth, and high speed, and is widely used in communication networks. One optical fiber, or one optical path in free space, can carry multiple communication channels simultaneously, known as multiplexing. The multiplexing can be completed on the circuit or on the optical path. The latter has higher channel bandwidth or rate than the former, and the present invention completes the multiplexing on the optical path. The existing multiplexing technologies on the optical path include wavelength division multiplexing, optical time division multiplexing and optical code division multiple access technologies. In contrast, waveleng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/00H04B10/12H04B10/2513
Inventor 陈彪
Owner ZHEJIANG UNIV
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