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Method for testing polarization coupling strength of polarization maintaining optical fiber based on polarization beam-splitting interference technique

A polarization-maintaining fiber and polarization beam splitting technology, which is used in the testing of optical performance and other directions, can solve the problems of weak acquisition signal, increased hardware design cost, low measurement accuracy of polarization coupling strength, etc. The effect of coupling and reducing the cost of hardware design

Active Publication Date: 2012-09-19
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

[0004] (1) The influence of light source power fluctuations on the measurement results cannot be eliminated, and the measurement accuracy of the polarization coupling strength is low;
[0005] (2) The acquisition signal is weak and the signal-to-noise ratio is poor, requiring hardware circuits for noise filtering processing, which increases the cost of hardware design

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  • Method for testing polarization coupling strength of polarization maintaining optical fiber based on polarization beam-splitting interference technique
  • Method for testing polarization coupling strength of polarization maintaining optical fiber based on polarization beam-splitting interference technique

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Embodiment Construction

[0015] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0016] Embodiments of the invention include:

[0017] A test method based on polarization beam splitting interference technology is provided, specifically: the two ends of the measured polarization-maintaining fiber 2 are welded to the polarization-maintaining fiber jumper, and the first end of the polarization-maintaining fiber jumper is connected to a wide-spectrum polarized light source 1 . The polarization-maintaining fiber is polarized and incident on the slow axis, and the light source spectrum has a Gaussian distribution; the end of the polarization-maintaining fiber jumper is connected to the self-focusing lens at the input end of the polarization beam splitter interferometer to ensure th...

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Abstract

Aiming to solve the problems in the prior art, such as low accuracy, weak collection signal and poor signal-to-noise ratio, the invention provides a testing method based on the polarization beam-splitting interference technique, which can effectively eliminate the impact of light source power fluctuation on measurement results and greatly improve the measurement accuracy of polarization coupling strength of a polarization maintaining optical fiber. Besides, the control method is simple and the control software is high in integration level.

Description

technical field [0001] The invention relates to a method for testing the polarization coupling strength of a polarization-maintaining fiber, in particular to a method for testing the polarization-coupling strength of a polarization-maintaining fiber based on polarization beam splitting interference technology. Background technique [0002] Domestic scientific research institutions have proposed measurement methods and test systems for polarization-maintaining fiber polarization coupling intensity distribution parameters, and the existing technologies are all based on Michelson interferometer spectroscopic interference technology. The application patent number is "200410094123" for the invention patent "high birefringence polarization maintaining optical fiber weak mode coupling measuring instrument and control method", which designs a high-precision high birefringence polarization maintaining optical fiber weak mode coupling measuring instrument, including the measured optica...

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Application Information

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IPC IPC(8): G01M11/02
Inventor 郑光金高业胜赵耀全治科韩正英刘志明李国超陈振琳
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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