Optical signal-to-noise ratio measurement method and optical signal-to-noise ratio measurement system

A technology of optical signal-to-noise ratio and measurement method, which is applied in the field of communication, can solve the problems of large measurement error, difficult optical fiber link, high cost and complexity, and achieve the effect of low cost and high precision
CN110492932AInactive Publication Date: 2019-11-22WUHAN POST & TELECOMM RES INST CO LTD
7 Cites 6 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN POST & TELECOMM RES INST CO LTD
Publication Date
2019-11-22
Estimated Expiration
Not applicable ยท inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to the field of communications, and particularly discloses an optical signal-to-noise ratio measurement method. The method comprises the steps of conducting light dispersion compensation on the signal light, then transmitting the signal light to a delay self-coherence interferometer, obtaining interference light intensity changes based on the delay self-coherence interferometer, wherein the delay difference between two arms of the delay self-coherence interferometer is larger than the code element period of signal light transmission signals; obtaining an interference light intensity change range, dividing the range into a plurality of continuous intervals, and obtaining a frequency histogram of interference light intensity distribution; inputting the frequency histogram into a pre-trained machine learning model to obtain an optical signal-to-noise ratio of signal light; meanwhile, the machine learning model is obtained by training a plurality of groups of frequency histograms with known optical signal-to-noise ratios and corresponding optical signal-to-noise ratios as a training set, optical signal-to-noise ratio monitoring can be realized at a receiving end and a link node, the measurement precision is higher, and the influence of signal and noise bandwidth changes is not easy to occur.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of communication technology, in particular to a method and system for measuring an optical signal-to-noise ratio. Background technique

[0002] In future long-distance, high-capacity, reconfigurable optical fiber communication systems, the link impairments experienced by signals will exhibit dynamic characteristics. Real-time and accurate link characteristic monitoring technology is the key to maximize the use of existing system resources to achieve maximum signal capacity and longest distance reliable transmission.

[0003] The optical signal-to-noise ratio is one of the key parameters that determine the performance of optical signal transmission, and it determines the bit error rate of the system to a large extent. Therefore, OSNR monitoring is one of the key technologies for performance monitoring of optical fiber communication systems.

[0004] Existing techniques for realizing optical signal-to-noise ratio meas...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More