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High-performance polarization degree tester calibration device and calibration method

A calibration device and a technology of degree of polarization, applied in the field of calibration, can solve the problems that wide-spectrum light sources are not suitable for calibrating light sources, the method of degree of polarization is cumbersome, and the modulation range is small.

Inactive Publication Date: 2014-03-19
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Application Information

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Problems solved by technology

The Lyot depolarization method is simple to operate, but the modulation range is small, and usually only wide-spectrum light sources can be modulated, and wide-spectrum light sources are not suitable for use as calibration light sources for polarization testers; the attenuator-based depolarization method has a large modulation range, And it can modulate the degree of polarization of the narrow linewidth light source, which is suitable for use in the calibration technology of the degree of polarization tester, but the attenuator usually needs to be used with an optical switch, and the error introduced by repeated use is relatively large. In addition, this method measures the self-modulated output light The degree of polarization method is more cumbersome

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  • High-performance polarization degree tester calibration device and calibration method

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Embodiment 1

[0022] Such as figure 1 As shown, the calibration device consists of a narrow linewidth laser 1, polarization controllers 2, 4, 6, dispersion module 5, polarization beam splitter 3, polarization beam combiner 9, fiber couplers 7, 8, detectors 10, 11 , 12. The data processing and display module 13 is combined, and the frequency domain depolarization technology based on the polarization controller is adopted. By adjusting the polarization controller 2, the continuously adjustable polarization degree of the output light of the calibration device can be realized.

[0023] The core of the calibration device for the degree of polarization tester in the present invention is the frequency domain depolarization technology based on the polarization controller. By adjusting the polarization controller 2 of the main optical path, the polarization degree of the narrow linewidth laser can be changed conveniently and flexibly, and the Polarization tester for fast and precise calibration. ac...

Embodiment 2

[0030] On the basis of the above-mentioned embodiments, further, a high-performance calibration device for a degree of polarization tester is provided, which is characterized in that it consists of a narrow linewidth laser, three polarization controllers, a dispersion module, a polarization beam splitter, and a polarization beam combiner consists of a laser, two fiber couplers, three detectors, and a data processing and display module; the narrow linewidth laser is connected to the first polarization controller and one end of the polarization beam splitter in sequence, and the other end of the polarization beam splitter is divided into two , one end is connected to the second polarization controller, dispersion module, and one end of the first fiber coupler in turn, and the other is connected to the third polarization controller and one end of the second fiber coupler in turn, and the other end of the first fiber coupler is divided into two lines, one end Connect the first dete...

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Abstract

The invention provides a high-performance polarization degree tester calibration device and calibration method. The calibration device is composed of a narrow linewidth laser, three polarization controllers, a dispersion module, a polarization beam splitter, a polarization beam combiner, two fiber couplers, three detectors and a data processing display module. The narrow linewidth laser is successively connected with a first polarization controller and one end of the polarization beam splitter; the other end of the polarization beam splitter is divided into two paths; one path is successively connected with a second polarization controller, the dispersion module and one end of a first fiber coupler; and the other path is successively connected with a third polarization controller and one end of a second fiber coupler. By using such a scheme, continuous adjustment of output light polarization degree of the calibration device can be realized through adjusting the polarization controllers, and errors introduced by repeated use of an optical switch in an attenuator method can be avoided.

Description

technical field [0001] The invention belongs to the technical field of calibration, and in particular relates to a high-performance calibration device and calibration method for a degree of polarization tester. Background technique [0002] The degree of polarization is an important parameter to characterize the polarization characteristics of light waves. Light waves are generally composed of natural light and polarized light. The degree of polarization is used to indicate the proportion of polarized light intensity in the total light intensity, that is, the degree of polarization of light waves. The degree of polarization tester can quickly and accurately measure the degree of polarization by performing polarization state modulation and energy testing on light waves, and has important application value in solving the polarization error problem in optical fiber technology. As the practical application range of the polarization tester becomes wider and wider, the required te...

Claims

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Application Information

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IPC IPC(8): G01J4/00
Inventor 李国超郑光金王恒飞赵耀高业胜
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP