PMD (polarization mode dispersion) and CD (chromatic dispersion) simultaneous-monitoring device and method

A monitoring device and photoelectric converter technology, applied in the field of optical communication, can solve problems such as poor stability, and achieve the effect of reducing cost and complexity

Inactive Publication Date: 2014-09-10
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A paper published by Y. Lizé et al. [3] proposed to use an interferometer to simultaneously monitor CD and PMD, which is suitable for NRZ-OOK and DPSK signals, but this method has poor stability

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  • PMD (polarization mode dispersion) and CD (chromatic dispersion) simultaneous-monitoring device and method
  • PMD (polarization mode dispersion) and CD (chromatic dispersion) simultaneous-monitoring device and method
  • PMD (polarization mode dispersion) and CD (chromatic dispersion) simultaneous-monitoring device and method

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] Such as figure 1 Shown, PMD of the present invention and CD monitor device simultaneously, comprise: beam splitter 1, filter 2, the first photoelectric converter 3, the first electric bandpass filter 4, the first power meter 5, the second photoelectric conversion device 6, a second electric bandpass filter 7 and a second power meter 8,

[0026] The B port of the beam splitter 1 is connected to the filter 2, the output of the filter 2 is connected to the first photoelectric converter 3, and the output of the first photoelectric converter 3 is connected to the first An electric bandpass filter 4, the output end of the first electric bandpass filter 4 is connected to...

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Abstract

The invention discloses a PMD (polarization mode dispersion) and CD (chromatic dispersion) simultaneous-monitoring device. The PMD and CD simultaneous-monitoring device comprises a beam splitter (1), a filter (2), a first photoelectric converter (3), a first electric band-pass filter (4), a first power meter (5), a second photoelectric converter (6), a second electric band-pass filter (7) and a second power meter (8). The invention further provides a PMD and CD simultaneous-monitoring method adopting the device. The PMD and CD simultaneous-monitoring method includes acquiring SSB (single side band) signals through a band rejection filter, calibrating SSB signal power and double-side band signal power which are used for monitoring DGD (differential group delay) and monitoring CD respectively. The PMD and CD simultaneous-monitoring device and method are applicable to a high-speed optical communication system, capable of simultaneously monitoring PMD and CD without changing a transmitter, and cost and complexity are reduced.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a PMD and CD simultaneous monitoring device and monitoring method. Background technique [0002] PMD is one of the important parameters that limit transmission performance in high-speed WDM systems. PMD accumulates in optical fiber links and many online devices, and changes with time, temperature, and network reconfiguration, so real-time PMD monitoring is very necessary. Another important parameter in the transmission link that causes signal impairment is CD. Simultaneous and independent monitoring of multiple damage parameters can reduce costs. Therefore, simultaneous monitoring of PMD and CD is particularly important. [0003] Measuring PMD in the presence of other impairments remains challenging with existing monitoring techniques. A paper published by J. Yang et al. [1] proposed that the use of Bragg gratings (FBG) to band-stop filter 38Gb / s NRZ-DQPSK signa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/07
Inventor 李兰兰黄栋
Owner FUZHOU UNIV
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