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Method and device for improving performances of polarization controller

A polarization controller and polarization control technology, applied in the field of optical communication, can solve the problems of not considering the optical signal, the inability to control the polarization accurately, and reducing the performance of the polarization controller, so as to reduce the residual birefringence and improve the performance.

Inactive Publication Date: 2013-10-09
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In the prior art, the polarization controller does not consider the influence of the residual birefringence of the optical signal, which leads to the inability to precisely control the polarization and reduces the performance of the polarization controller

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  • Method and device for improving performances of polarization controller
  • Method and device for improving performances of polarization controller
  • Method and device for improving performances of polarization controller

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Embodiment Construction

[0026] Embodiments of the present invention provide a method and a device for improving the performance of a polarization controller. In order to better understand the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only the present invention Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] The polarization control unit in the embodiment of the present invention can be controlled by an appropriate control voltage through the electro-optic effect, and can be used as a wave plate with high-speed changes in phase differen...

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Abstract

A method for improving the performance of a polarization controller includes the steps of: monitoring the polarized states of the optical signals outputted by the polarization controller, and outputting four voltage signals corresponding to the polarized states of the optical signals (101); obtaining four Stokes parameter signals (S0, S1, S2, S3) of the optical signals based on the four voltage signals (102); creating a polarization control signal based on the four Stokes parameter signals, the polarization control signal corresponding to the smallest quadratic sum of the difference values between each sampling value of the four Stokes parameters and the target Stokes parameter corresponding to each sampling value (103); inputting the created polarization control signal into the polarization controller (104). The effect of remaining birefringence in the polarization controller can be reduced, thus improving the performance of the polarization controller. A device for improving the performance of the polarization controller is also provided.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a method and a device for improving the performance of a polarization controller. Background technique [0002] In the optical fiber communication system, due to the impact of extrusion, twisting and other environmental factors on the optical fiber, the polarization state of the optical signal transmitted in the optical fiber changes, which causes polarization film dispersion (PMD, Polarization mode Dispersion), resulting in information loss. Therefore, it is necessary to compensate the signal caused by the dispersion of the polarizing film. In the prior art, a compensation unit is usually used for compensation. The compensation unit usually includes a polarization controller, and the performance of the polarization controller and the ease of control are directly related to the compensation effect. [0003] Polarization controllers in the prior art include LiNbO3 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01
CPCG02F1/0136G02F1/011G02F1/0121
Inventor 张晓光张阳安张文博张光勇熊前进李喜祥
Owner HUAWEI TECH CO LTD
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