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Method and apparatus for measuring polarization mode dispersion vector

A polarization mode dispersion and vector technology, applied in the field of polarization mode dispersion vector testing, can solve the problems of inability to provide PMD vector, inconsistent SOP, difficult to apply PMD compensation requirements, etc., to avoid wavelength repeatability errors and avoid measurement errors. , the effect of suppressing measurement noise

Active Publication Date: 2010-09-29
SHENZHEN JPT OPTO ELECTRONICS CO LTD
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Problems solved by technology

Although the measurement speed can be improved, the inconsistency of the SOP cannot be avoided
[0009] Some other PMD measurement methods such as fixed analysis method (FA), traditional interferometry (TINTY) and extended interferometry (GINTY) are difficult to apply to the requirements of PMD compensation because they cannot give the PMD vector

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  • Method and apparatus for measuring polarization mode dispersion vector
  • Method and apparatus for measuring polarization mode dispersion vector
  • Method and apparatus for measuring polarization mode dispersion vector

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Embodiment Construction

[0039] The features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

[0040] Jopson et al. have proved in 1999 that in a system containing polarization-dependent loss or gain (PDL / G), the PMD vector is expressed as consists of two real vectors and consists of a matrix M Δ =M(ω+Δω)M -1 (ω) expression [1] . where M(ω+Δω) and M(ω) are the Miller matrices of the system under test at frequencies ω and ω+Δω. Combined with the method proposed by Dong Hui et al. in 2007 to use any three sets of linearly independent input polarization states and their corresponding output polarization states to measure the system Miller matrix [2] , describing the PMD vector M Δ matrix can be calculated.

[0041] Please refer to figure 1 , the basic process of the method for measuring the polarization mode dispersion vector in the present invention is as follows:

[0042] Step A, making the light of the specified wavelength pass ...

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Abstract

The invention discloses a method for measuring chromatic dispersion vector of a polarization mode. The method comprises the following steps: light with appointed wavelength passes through a device to be tested according to three input polarization states respectively; three input polarization states meet linear independence; three output polarization states formed after the light passes through the device to be tested are measured respectively; the three input polarization states and the three output polarization states are recorded into a set of calculating data; the step is repeated; a plurality of calculating data with different appointed wavelength is recorded; according to each set of the calculating data, each Mueller matrix with appointed wavelength is calculated; and according to the Mueller matrix, the chromatic dispersion vector of the polarization mode of the device to be tested is calculated. The invention also discloses a measuring device adopting the method. The method can reduce errors introduced by the adjustment of wavelength and input polarization states in the measuring process and improve the measuring precision of the chromatic dispersion vector of the polarization mode.

Description

【Technical field】 [0001] The present invention relates to the test of polarization mode dispersion (PMD) vector of optical fiber device or system, in particular, relates to a method and device for measuring polarization mode dispersion vector. 【Background technique】 [0002] With the development of long-distance all-optical networks, optical fiber communication systems become more and more complex and use a large number of devices and equipment. Therefore, it is becoming more and more important to measure the characteristics of optical fiber devices and equipment (DUT) accurately and quickly. [0003] There are two main types of properties for such systems: polarization-dependent and polarization-independent properties. Polarization dependent properties include polarization dependent loss or gain (PDL / G), birefringence and depolarization effects. Polarization-independent properties include dispersion, scattering, loss, etc. With the rapid development of optical fiber comm...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02G01J4/00
Inventor 刘健周俊强董晖黄治家
Owner SHENZHEN JPT OPTO ELECTRONICS CO LTD
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