Polarization mould chromatic dispersion simulator, compensator and compensating system

A polarization mode dispersion and compensator technology, which is applied in the transmission system, electromagnetic wave transmission system, electrical components, etc., can solve the problems of increasing bit error rate, signal distortion and deformation, etc., and achieve the effect of eliminating influence, reducing influence and fast response speed

Inactive Publication Date: 2005-08-10
HUAWEI TECH CO LTD
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Problems solved by technology

Polarization mode dispersion will cause pulse broadening and increase the bit error rate in digital communication systems; it will produce high-order distortion effects in analog communication systems, which will distort the signal

Method used

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  • Polarization mould chromatic dispersion simulator, compensator and compensating system
  • Polarization mould chromatic dispersion simulator, compensator and compensating system
  • Polarization mould chromatic dispersion simulator, compensator and compensating system

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Embodiment Construction

[0059] The Sagnac effect was first discovered and experimentally confirmed by the Frenchman Sagnac in 1913. It revealed the analytical relationship between the optical path difference of two counter-propagating lights in the same optical path and their rotational speed. Figure 4 A schematic diagram of the Sagnac effect is given, as Figure 4 As shown, we examine a circular optical track, in which the optical path is composed of N turns of optical fibers. The light emitted by the light source enters the optical path and is divided into two clockwise and counterclockwise directions by the splitter BS at point A. Propagating at the same speed, after the same distance of 2πNa (a is the radius of the circular orbit), it reconvenes at BS. If the system is stationary, the two beams of light have experienced exactly the same optical path and, therefore, are in the same phase. However, if the circular orbit rotates clockwise with an angular velocity Ω, the time at which the two beams...

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Abstract

A polarizing mode dispersion simulator, compensator and compensation system are disclosed. Said system is composed of polarizing controller, optical circulator with three ports for receiving the optical signal from polarizing controller, outputting it to polarizing splitter and outputting the compensated optical signal, polarizing splitter for splitting to optical signal into two orthogonal polarized components, optical fibre ring, and rotating device for rotating the optical ring to generate a delay difference between said two orthogonal polarized components. Its advantages are simple structure, high response speed, and low cost.

Description

technical field [0001] The invention relates to a polarization mode dispersion simulator, a compensator and a compensation system, in particular to a polarization mode dispersion simulator, a compensator and a compensation system based on the Sagnac effect in an optical communication system. Background technique [0002] PMD (polarization mode dispersion, polarization mode dispersion) refers to two mutually orthogonal polarization modes LP transmitted in a single-mode fiber 01 X and LP 01 Y , the time difference of arrival after transmission over a certain distance in the fiber. The unit of measure for PMD is Ps. Under ideal conditions, under ideal conditions where the fiber is collimated, the cross-section is a standard circle, and the refractive index distribution is uniformly symmetric and isotropic, the LP 01 X and LP 01 Y The transmission constants βx and βy are equal, and the two polarization modes are completely second-degree mergers (the propagation constants...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/27H04B10/2569
Inventor 刘仲恒
Owner HUAWEI TECH CO LTD
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