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Method for improving accuracy of OSNR (Optical Signal to Noise Ratio) of wavelength division multiplexing system

A technology of wavelength division multiplexing and optical signal-to-noise ratio, applied in the direction of wavelength division multiplexing system, electromagnetic wave transmission system, transmission system, etc., can solve the problems of test inaccuracy, achieve error reduction, accurate test, and improve reliability Effect

Active Publication Date: 2018-08-03
GUANGXUN SCI & TECH WUHAN
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Problems solved by technology

[0004] In view of the above problems, the object of the present invention is to propose a method for the accuracy of the optical signal-to-noise ratio (OSNR) of a wavelength division multiplexing system, aiming to solve the problem that the existing OSNR test method is applied to the wavelength division multiplexing system below 10 channels. Technical issues with accuracy

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  • Method for improving accuracy of OSNR (Optical Signal to Noise Ratio) of wavelength division multiplexing system
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  • Method for improving accuracy of OSNR (Optical Signal to Noise Ratio) of wavelength division multiplexing system

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[0026] 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.

[0027] see figure 1 , the wavelength division multiplexing system test optical signal-to-noise ratio scheme designed by the present invention is different from the ordinary wavelength division multiplexing system test optical signal-to-noise ratio method:

[0028] The method for improving the OSNR accuracy of the optical signal-to-noise ratio of the wavelength division multiplexing system provided by the present invention, the receiving end of the wavelength division multiplexing system is connected to the output end of the Raman optical fiber amplifier or the erbium-doped optical fiber amplifier, ...

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Abstract

The invention is applicable to the field of optical communications, and provides a method for improving the accuracy of an OSNR (Optical Signal to Noise Ratio) of a wavelength division multiplexing system. On an application occasion of the wavelength division multiplexing system, particularly on an application occasion of a system having a small number of channels, less than 10 channels, by testing signal optical power and noise optical power of a tested channel at the output end of a Raman fiber amplifier or an erbium-doped fiber amplifier at a system receiving end, by adopting a noise function and a correction factor, an OSNR of each channel of the wavelength division multiplexing system is acquired according to the measured signal optical power and noise optical power. By the adoption of the method, the OSNR of each channel of the wavelength division multiplexing system can be accurately extracted, and a test error can be reduced, so that the reliability and the stability of the wavelength division multiplexing system are effectively improved.

Description

technical field [0001] The invention belongs to the field of wavelength division multiplexing optical communication, in particular to a method for improving the accuracy of the optical signal-to-noise ratio (OSNR) of a wavelength division multiplexing system. Background technique [0002] With the wide-scale application of WDM systems, one of the key performance indicators of WDM systems, the optical signal-to-noise ratio (OSNR), can reflect the transmission quality of signal light very intuitively and clearly, and it can better evaluate business The transmission quality after passing through the transmission channel. [0003] The traditional method of detecting OSNR is to calculate OSNR by in-band signal and out-of-band ASE noise. The optical power of the in-band signal is the total in-band power of the channel minus the optical power of the in-band ASE noise. The in-band ASE noise optical power is measured by turning off the channel; There are certain errors in the metho...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/079
CPCH04B10/07953H04J14/02
Inventor 徐健黄丽艳王文忠罗清王啸东赵景辉张佐星王智慧陈芳孙雨潇
Owner GUANGXUN SCI & TECH WUHAN
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