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Optical signal-to-noise ratio monitoring method and system

An optical signal-to-noise ratio and optical signal technology, which is applied in the field of optical communication and can solve the problems of high system layout cost, slow speed, and large amount of calculation.

Active Publication Date: 2021-07-06
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such a solution needs to consider the cumulative dispersion in the optical path, and then eliminate it. In this way, a dispersion compensation module needs to be installed, which makes the system layout cost high, the amount of calculation is large, and the speed is slow

Method used

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  • Optical signal-to-noise ratio monitoring method and system
  • Optical signal-to-noise ratio monitoring method and system
  • Optical signal-to-noise ratio monitoring method and system

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Embodiment 1

[0078] Such as figure 1 Shown is an optical signal-to-noise ratio monitoring method, including the following steps:

[0079] S1: split the optical signal to be monitored into two modulated signals;

[0080] S2: Receive two modulation signals respectively, and output two electrical signals respectively, wherein the two electrical signals contain highly consistent narrow bandwidth information, which are recorded as the upper sideband narrow bandwidth frequency domain signal and the lower sideband narrow bandwidth frequency domain signal respectively;

[0081] S3: collect two electrical signals, and analyze and process the two electrical signals through the digital signal processing module to obtain the relationship between the upper sideband narrow bandwidth frequency domain signal and the lower sideband narrow bandwidth frequency domain signal;

[0082] S4: According to the relationship between the upper sideband narrow bandwidth frequency domain signal and the lower sideband ...

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Abstract

The invention belongs to the technical field of optical communication, and particularly relates to an optical signal-to-noise ratio monitoring method and system, and the method comprises the steps: splitting a to-be-monitored optical signal into two modulation signals; receiving the two modulation signals and respectively outputting two electric signals comprising highly consistent narrow bandwidth information, wherein the two electric signals are respectively marked as an upper sideband narrow-bandwidth frequency domain signal and a lower sideband narrow-bandwidth frequency domain signal; collecting two electric signals, and analyzing and processing the two electric signals through a digital signal processing module to obtain a relation between an upper sideband narrow bandwidth frequency domain signal and a lower sideband narrow bandwidth frequency domain signal; according to the relationship between the upper sideband narrow bandwidth frequency domain signal and the lower sideband narrow bandwidth frequency domain signal, respectively obtaining matrixes for representing signal intensity and noise intensity; and obtaining the determinant about the optical signal-to-noise ratio according to the matrixes used for representing the signal intensity and the noise intensity, and obtaining the expression of the optical signal-to-noise ratio according to the determinant. The process is not influenced by dispersion, small in calculation amount and high in speed.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to an optical signal-to-noise ratio monitoring method and a system thereof. Background technique [0002] With the vigorous development of the mobile Internet, the data traffic has also shown explosive growth. These massive data transmission requests will eventually need to be satisfied through the optical fiber transmission system, which drives the optical fiber communication system towards large capacity, ultra-high speed, dynamic to develop in the direction of transformation. At present, the optical transport network system technology of single wavelength 100Gbit / s and single optical fiber 8Tbit / s has been widely used in the telecommunication network, and continues to develop towards the transmission rate of single wavelength 400Gbit / s. [0003] At present, the high-speed, high-capacity optical fiber communication system is mainly supported by new m...

Claims

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Application Information

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IPC IPC(8): H04B10/079
CPCH04B10/07953H04B10/07951
Inventor 王大伟莫遥梁国伟李朝晖
Owner SUN YAT SEN UNIV
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