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Method, device and system for online calibration of configurable site wavelength-dependent attenuation

A wavelength-related and wavelength-based technology, applied in the field of communication, can solve the problem of not being able to accurately know the WDL of a configurable site

Inactive Publication Date: 2016-03-02
陆中尧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a method for online calibration of the wavelength-dependent attenuation of a configurable site, which aims to solve the problem that the WDL of a configurable site cannot be accurately obtained in the prior art, and realize After the wavelength is opened, the WDL of the configurable site can be updated in real time, providing reliable input parameters for the planning algorithm to provide high-quality network services

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  • Method, device and system for online calibration of configurable site wavelength-dependent attenuation
  • Method, device and system for online calibration of configurable site wavelength-dependent attenuation

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Embodiment 1

[0100] Figure 5 A flow chart of the method for calibrating the wavelength-dependent attenuation of a configurable station online according to the first embodiment of the present invention is shown. For the convenience of description, only parts related to this embodiment are shown.

[0101] In step S101, the single-wavelength output optical power of the wavelength to be calibrated outputted by the optical amplifier at the transmitting end is obtained.

[0102] In the embodiment of the present invention, the optical amplifier at the transmitting end (referred to as "the optical amplifier at the transmitting end") emits the light wave including the wavelength to be calibrated. The light wave can be a composite wave (light waves with multiple wavelengths) or a single wave (light waves with only one wavelength). monochromatic light sources such as lasers or monochromatic conventional light sources. Stimulated radiation and spontaneous emission are common phenomena in optical am...

Embodiment 2

[0112] When it is necessary to calibrate the wavelength-dependent attenuation for multiple wavelengths, the embodiment of the present invention provides a better implementation method for step S102 on the basis of the first embodiment above, as follows:

[0113] Multiple wavelength pass-through configurations are performed on the configurable sites, and each wavelength pass-through configuration is: configure one of the multiple wavelengths to be calibrated as a pass-through configurable site, and block the optical wave pass-through of other wavelengths to be calibrated. The station is configured, and the wavelength of the light wave passing through the configurable station is different each time; and, after each wavelength pass-through configuration is completed, the incident optical power of the light wave reaching the optical amplifier at the receiving end is detected.

[0114] More specifically, the above method can be implemented through the following steps:

[0115] The ...

Embodiment 3

[0126] Image 6 A flow chart of the method for calibrating the wavelength-dependent attenuation of a configurable station online according to the third embodiment of the present invention is shown. For the convenience of description, only the parts related to this embodiment are shown.

[0127] The embodiment of the present invention is applicable to the situation where there is no service wavelength at the configurable site in the deployment stage, and there is no external monochromatic light source at the originating optical amplifier but an OPM device is configured. The details are as follows:

[0128] In step S301, make the transmitting-end optical amplifier work in a spontaneous emission state, and control the spontaneous emission intensity of the transmitting-end optical amplifier so that it is under a spontaneous emission intensity;

[0129] In step S302, the OPM device detects the single-wave outgoing light power P of each light wave of the wavelength to be calibrated ...

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Abstract

A method, a device and an optical communication system for online calibration configurable site wavelength dependent attenuation are provided. The method comprises obtaining single wave emitted light power to be calibrated wavelength transmitted from an optical amplifier at a transmitting end (S101); performing the configurable site wavelength through configuration so that light wave to be calibrated wavelength can penetrate configurable site to reach an optical amplifier at a receiving end, and detecting light wave incident optical power reaching the optical amplifier at the receiving end (S102); and according to the single wave emitted light power to be calibrated wavelength and light wave incident optical power reaching the optical amplifier at the receiving end, obtaining wavelength dependent attenuation of the wavelength to be calibrated (S103). The method can obtain and update WDL in real time in a network starting stage and an expansion stage, so as to update the network state timely and ensure the high communication quality. In addition, the solution can realize the wavelength dependent attenuation online calibration completely based on the prior network environment, and does not need to add any hardware, which effectively controls the cost increase.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a method, device and system for online calibration of wavelength-dependent attenuation of a configurable site. Background technique [0002] In the optical communication network, the attenuation of the wavelength division multiplexing network at the ROADM (reconfigurable optical add-drop multiplexer, reconfigurable optical add-drop multiplexer) site (also known as the configurable site) has wavelength dependence, that is, the performance of the network has a Channels are all wavelength-dependent, and often the attenuation of a site in different wavelength channels can reach 3-4dB, or even greater. This attenuation is related to the WDL (wavelength dependent loss, wavelength-dependent attenuation) of the passive device, and usually the WDL of the WSS (wavelength selective switch, wavelength selective switch) is dominant. [0003] figure 1 It shows the network topology struc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/075
CPCH04B10/075
Inventor 周恩波张森
Owner 陆中尧
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