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Method and device for monitoring optical signal to noise ratio (OSNR)

A technology of optical signal-to-noise ratio and monitoring channel, which is applied in the field of communication and can solve the problems of unfavorable WDM system operation and low accuracy

Active Publication Date: 2015-07-01
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

[0006] Embodiments of the present invention provide a method and device for monitoring OSNR, which are used to solve the problem that the existing monitoring method for OSNR has low monitoring accuracy and is not conducive to the operation of the WDM system

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  • Method and device for monitoring optical signal to noise ratio (OSNR)
  • Method and device for monitoring optical signal to noise ratio (OSNR)
  • Method and device for monitoring optical signal to noise ratio (OSNR)

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Embodiment Construction

[0019] The specific implementation manners of a method and device for monitoring OSNR provided by the embodiments of the present invention will be described below with reference to the drawings in the description.

[0020] A method for monitoring OSNR provided by an embodiment of the present invention, such as Figure 1A As shown, it specifically includes the following steps:

[0021] S11: respectively determine the actual signal power, the ideal signal power and the noise signal power of the wavelength signals sent by the other party through the same channel to be monitored received by the two transceivers as the communication parties;

[0022] S12: Calculate the signal power transfer coefficient and noise power transfer coefficient of the channel to be monitored according to the determined actual signal power, ideal signal power and noise power of the two wavelength signals respectively;

[0023] S13: Calculate the OSNR of the wavelength signal received by each transceiver e...

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Abstract

The embodiment of the invention provides a method and a device for monitoring the optical signal to noise ratio (OSNR). The method comprises the steps of respectively determining the actual signal power, the ideal signal power and the noise signal power of wavelength signals, which are received by two transmitting and receiving terminals acting as two communication parties and sent by the opposite party through the same channel to be monitored; calculating a signal power transfer factor and a noise power transfer factor of the channel to be monitored according to the determined actual signal power, the ideal signal power and the noise power of the two wavelength signals; and calculating the OSNR of the wavelength signal received by each transmitting and receiving terminal according to the actual signal power, the noise power, the calculated signal power transfer factor and the calculated noise power transfer factor of the wavelength signal received by each transmitting and receiving terminal. According to the embodiment of the invention, an existing OSNR calculation mode is modified through calculating the signal power transfer factor and the noise power transfer factor of the channel to be monitored so as to improve the accuracy of OSNR monitoring.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a method and device for monitoring an optical signal-to-noise ratio (OSNR). Background technique [0002] The Optical Signal to Noise Ratio (OSNR) of a wavelength division multiplexing (WDM) system is the degree to which the detection signal is interfered by noise during transmission along the optical fiber. It is a key parameter to measure the transmission performance of the WDM system, specifically the signal of the channel The ratio of the power to the noise power within 0.1 nm of the signal wavelength. [0003] At present, with the rapid development of the WDM system, the single-wavelength rate of the WDM system has reached 100Gbit / s. Due to the wide signal spectrum of the 100Gbit / s rate, adjacent signal spectra are prone to overlap and crosstalk. In this way, if the traditional If the method of monitoring the OSNR of a 10Gbit / s rate signal is used to monitor the OSNR...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/077H04B10/079
Inventor 李允博李晗王磊柳晟
Owner CHINA MOBILE COMM GRP CO LTD
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