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Method and apparatus for calculating nonlinear transmission impairments of optical fiber link

A nonlinear transmission and optical fiber link technology, which is applied in the field of calculation methods and devices for optical fiber link nonlinear transmission damage, and can solve the problems of optical fiber link nonlinear transmission damage, slow calculation speed, and occupation of computing resources, etc.

Active Publication Date: 2013-01-16
广州市鑫光光缆有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a method and device for calculating nonlinear transmission damage of optical fiber links, which solve the problems of slow calculation speed and occupation of a large number of calculation resources in the prior art

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  • Method and apparatus for calculating nonlinear transmission impairments of optical fiber link
  • Method and apparatus for calculating nonlinear transmission impairments of optical fiber link
  • Method and apparatus for calculating nonlinear transmission impairments of optical fiber link

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Embodiment 1

[0185] Embodiment 1. This embodiment of the present invention provides a calculation method for nonlinear transmission damage of an optical fiber link. Such as image 3 As shown, there is only one signal light wavelength in the optical fiber link, which contains 4 spans in total, and there are 1 optical filter at the input of the first span and the third span to filter the signal light. The method specifically includes the following steps:

[0186] Step S201, determine that there is no pump light on the fiber link, obtain the in-band nonlinear noise factor of the optical filter on the fiber link, and obtain the integrated power within the bandwidth of the signal light across the segment on the fiber link.

[0187] The nonlinear noise factors include the in-band nonlinear noise factor α intra and the interband nonlinear noise factor α inter , the two are parameters related to the transmitter characteristics of the signal light, the fiber link characteristics and the network ...

Embodiment 2

[0222] Embodiment 2. The embodiment of the present invention provides a method for calculating nonlinear transmission damage of an optical fiber link. Such as image 3 As shown, there are 2 wavelengths in the fiber link, a signal wavelength and a pump wavelength. A total of 4 spans are included, and an optical filter is respectively installed at the input of the first span and the third span to filter the signal light. Only the signal light is filtered, the pump light is not filtered. The method specifically includes the following steps:

[0223] Step S301, determine that there is one or more pump lights on the fiber link, obtain the in-band nonlinear noise factor of the pass-through filter and the inter-band nonlinear noise factor of the pass-pass filter on the fiber link, and obtain the fiber link Integral power within the signal optical bandwidth of the upper span and the integrated power within the pump optical bandwidth of the upper span of the fiber link.

[0224] In...

Embodiment 3

[0266] Embodiment 3, the embodiment of the present invention provides a method for calculating nonlinear transmission damage of an optical fiber link. Such as image 3 As shown, there are 2 wavelengths in the fiber link, a signal wavelength and a pump wavelength. A total of 4 spans are included, and an optical filter is respectively installed at the input of the first span and the third span to filter the pump light. Only the pump light is filtered, the signal light is not filtered. The method specifically includes the following steps:

[0267] Step S401, determine that there is one or more pump lights on the fiber link, obtain the in-band nonlinear noise factor of the pass filter on the fiber link and the interband nonlinear noise factor of the pass filter, and obtain the fiber link Integral power within the signal optical bandwidth of the upper span and the integrated power within the pump optical bandwidth of the upper span of the fiber link.

[0268] In this embodiment...

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Abstract

The invention relates to the field of network communication, and specifically discloses a method for calculating nonlinear transmission impairments of an optical fiber link. The method comprises, ensuring that there is no pump channel on the optical fiber link, obtaining an in-band nonlinear noise factor not passing through an optical filter in the optical fiber link and obtaining integral power within signal channel bandwidths of cross segments in the optical fiber link; correcting the in-band nonlinear noise factor not passing through the optical filter in the optical fiber link and obtaining an in-band nonlinear noise factor passing through the optical filter of the cross segments in the optical fiber link; calculating nonlinear noises of the cross segments in the optical fiber link; and obtaining total nonlinear noises of the optical fiber link according to the nonlinear noises of the cross segments in the optical fiber link, thereby obtaining the nonlinear transmission impairments of the optical fiber link. An embodiment of the invention further discloses an apparatus for calculating nonlinear transmission impairments of the optical fiber link.

Description

technical field [0001] The invention relates to network communication technology, in particular to a calculation method and device for optical fiber link nonlinear transmission damage. Background technique [0002] With the rapid development of optical communication technology, the realization of dense wavelength division multiplexing technology (Dense Wavelength Division Multiplexing, DWDM) has greatly improved the capacity and transmission distance of the optical fiber communication system, and each wavelength signal must pass through the multiplexer from the sending end to the receiving end. , comb filter, demultiplexer and other filter devices. On the other hand, the optical network structure will transition from a ring network to a mesh network, and a large number of optical filters will be used in the network to process wavelength services. [0003] As the signal modulation rate increases, the width of the signal spectrum also increases. In high-speed systems such as 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08
CPCH04B10/2543H04B10/0795H04B10/079H04B10/07953H04B10/00H04B17/00H04B10/0791
Inventor 张森周恩波叶亚斌
Owner 广州市鑫光光缆有限公司
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