A Method of Improving the Carrier-to-Noise Ratio of Multi-Carrier Light Sources

A multi-carrier, carrier-to-noise ratio technology, applied in multi-carrier systems, electromagnetic wave transmission systems, electrical components, etc., to achieve the effects of suppressing and amplifying spontaneous radiation noise, good network communication quality, and good network reliability

Inactive Publication Date: 2016-03-30
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0007] In view of the above defects, the technical problem to be solved by the present invention is how to greatly improve the carrier-to-noise ratio while reducing the amplified spontaneous emission noise introduced by the amplifier

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  • A Method of Improving the Carrier-to-Noise Ratio of Multi-Carrier Light Sources
  • A Method of Improving the Carrier-to-Noise Ratio of Multi-Carrier Light Sources
  • A Method of Improving the Carrier-to-Noise Ratio of Multi-Carrier Light Sources

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Embodiment Construction

[0028] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] An embodiment of the present invention provides a method for improving the carrier-to-noise ratio of a multi-carrier light source. The specific process is as follows figure 1 shown, including the following steps:

[0030] Step S1, setting a time-delay interferometer after the optical amplifier, wherein the time-delay interferometer is a Mach-Zehnder structure.

[0031] The method provided in this embodiment is not only applicable to multi-carrier light sources or optical frequency combs with a loop structure, but also applicable to multi-carrier light sources or optical frequency combs with a non-loop structure, such as figure 2 with 3 shown, where figure 2 A ...

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Abstract

The invention discloses a method for improving multi-carrier light source carrier-to-noise ratios. The method includes the steps that S1, a time delay interferometer is arranged at the back of a light amplifier; S2, signals transmitted into the time delay interferometer are divided into two paths with the same strength, wherein one path is a time delay path used for adding time delay to the signals, and the other path is a phase modulation path and used for adding phase positions to the signals; S3, the time delay path and the phase modulation path are combined, and constructive interference at center frequency of all subcarriers and destructive interference at midpoint frequency between the adjacent subcarriers are achieved by selecting suitable time delay and phase shift. The method is suitable for multi-carrier light sources or optical frequency combs with a loop structure and is also suitable for multi-carrier light sources or optical frequency combs with a non-loop structure, the purpose of restraining amplified spontaneous emission noise produced by the light amplifier is achieved by using the time delay interferometer, the carrier-to-noise ratios can be improved by 10-15dB, and therefore technical support can be provided for practicability of network communication systems with higher speed rates.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a method for improving the carrier-to-noise ratio of a multi-carrier light source. Background technique [0002] With the rapid growth of global broadband service traffic, especially video services such as SDTV (Standard Definition Television, standard definition television), HDTV (High Definition Television, high-definition television), OnlineGame (online game), VOD (VideoOnDemand, video on demand technology), etc. Appeared, brought huge pressure to the transmission channel capacity. At present, the 100Gb / s Ethernet system has been successfully commercialized, and the urgent task of the next generation communication is to develop towards Terabit (Tb / s) Ethernet transmission. At present, in the scheme of realizing the large-capacity transmission system of terabit, the terabit transmission system based on the multi-carrier light source is a very competitive sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/2557H04L27/38
Inventor 林嘉川席丽霞张晓光张霞张文博
Owner BEIJING UNIV OF POSTS & TELECOMM
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