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Intensity-modulated directly received optical signal generating method and device and intensity-modulated directly received optical signal receiving method and device

A technology of intensity modulation and generating equipment, which is applied in the field of communication, can solve the problems of optical fiber dispersion power attenuation and low transmission distance, and achieve the effects of increasing transmission distance, reducing steepness, and reducing the impact of power attenuation

Active Publication Date: 2020-05-08
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology

However, this method of intensity modulation and direct detection will be affected by the severe power attenuation caused by fiber dispersion, so the transmission distance of optical fiber communication systems that generally use intensity modulation and direct detection architectures is less than 40 kilometers

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  • Intensity-modulated directly received optical signal generating method and device and intensity-modulated directly received optical signal receiving method and device
  • Intensity-modulated directly received optical signal generating method and device and intensity-modulated directly received optical signal receiving method and device
  • Intensity-modulated directly received optical signal generating method and device and intensity-modulated directly received optical signal receiving method and device

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[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0042] Here, first briefly introduce the intensity modulation direct reception (IM-DD). The device can restore the original signal. Among them, the signal at the digital signal generating end modulates the intensity of the optical carrier, and the receiving end uses a detector to directly detect the optical fiber communication system of the optical signal.

[0043] The basic structure of inten...

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Abstract

The invention relates to the field of communication, and discloses an intensity-modulated directly received optical signal generating and receiving method. The method comprises the steps that a digital signal generating end inserts a carrier into an original DMT signal to obtain a double-sideband first DMT signal; and then the first DMT signal is subjected to intensity modulation and filtering toobtain a single-sideband optical signal. Since the single-sideband signal is transmitted in the optical fiber link, the influence of optical fiber dispersion on power attenuation in the signal transmission process is effectively reduced, and the transmission distance is greatly increased.

Description

technical field [0001] The present application relates to the field of communications, and in particular to an optical signal generation method, receiving method and device for intensity modulation direct reception. Background technique [0002] With the popularization of coherent optical communication technology in the backbone network, the network traffic in the backbone network can already reach a capacity of more than 40 Tb / s. The current traffic bottleneck is mainly transferred to the metropolitan area network. The technical difficulty lies in the need for low-cost optical fiber transmission technology to realize the successful transmission of single-wavelength 100Gb / s optical signals on 100 kilometers of single-mode optical fiber. Among them, the low-cost requirement lies in This technology needs to be different from coherent optical transmission technology. The current scheme mainly uses intensity modulation and direct detection. Compared with coherent optical transmi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/69H04B10/67H04B10/54H04B10/516
CPCH04B10/5165H04B10/54H04B10/67H04B10/673H04B10/69
Inventor 刘紫青李响罗鸣李海波贺志学
Owner WUHAN POST & TELECOMM RES INST CO LTD
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