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All-fiber testing device for testing polarization crosstalk of optical device

A technology of polarization crosstalk and optical devices, which is applied in testing optical performance, etc.

Active Publication Date: 2015-02-25
HARBIN ENG UNIV
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Problems solved by technology

This method can improve the polarization crosstalk sensitivity of the all-fiber measurement system to -95dB, but maintain the dynamic range at 75dB

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  • All-fiber testing device for testing polarization crosstalk of optical device
  • All-fiber testing device for testing polarization crosstalk of optical device
  • All-fiber testing device for testing polarization crosstalk of optical device

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Embodiment Construction

[0054] In order to clearly illustrate the method and device of the present invention for improving the measurement performance of distributed polarization crosstalk of optical devices, the present invention will be further described in conjunction with the examples and accompanying drawings, but the protection scope of the present invention should not be limited by this.

[0055] Polarization crosstalk all-fiber test system using Michelson structured optical path correlator, such as Figure 5 shown. The selection of main optoelectronic devices and their parameters are as follows:

[0056] (1) The central wavelength of the broadband light source 501 is 1550nm, the half-spectrum width is greater than 45nm, the fiber output power is greater than 2mW, and the extinction ratio is greater than 6dB;

[0057] (2) The working wavelength of the online fiber polarizer 511 is 1550nm, the extinction ratio is 30dB, the insertion loss is less than 1dB, the input end is a single-mode fiber, ...

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Abstract

The invention provides an all-fiber testing device for testing the polarization crosstalk of an optical device. The all-fiber testing device comprises a wide-spectrum light source (501), a polarizer (511), a to-be-tested polarizing device (522), an optical path correlator (530), a difference detector (550) and a photoelectric signal conversion and signal recording device (560), wherein the wide-spectrum light source (501) is connected with the to-be-tested optical fiber device (522) through the polarizer (511) and a first rotary connector (521) and is connected with the optical path correlator (530) with a polarization beam splitting Michelson structure through a second rotary connector (523); and the optical path correlator (530) is connected with the polarization difference detector (550) through a third rotary connector (541) and is connected with an interference signal detecting and processing device (560). The all-fiber testing device has the advantages of small size, high measurement accuracy, high temperature and vibration stability and the like, so that the all-fiber testing device is widely applied to high-accuracy measurement and analysis of the polarization performance of the optical device.

Description

technical field [0001] The invention relates to an optical fiber measuring device, in particular to an all-fiber testing system for measuring polarization crosstalk of optical devices. Background technique [0002] Optical coherent domain polarization measurement technology (OCDP) is a high-precision distributed polarization coupling measurement technology. It is based on the principle of wide-spectrum light interference. It uses a scanning optical interferometer to perform optical path compensation to achieve interference between different polarization modes. The spatial position of the polarization crosstalk and the intensity of the polarization coupling signal are measured and analyzed with high precision, and then important parameters such as the extinction ratio and the beat length of the optical polarization device are obtained. As a very promising detection method for distributed optical polarization performance, OCDP technology is widely used in the fields of polariz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
Inventor 杨军苑勇贵彭峰柴俊苑立波
Owner HARBIN ENG UNIV
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