Calibration device for optical coherence polarization measurement and dynamic range calibration method thereof

A calibration device and optical coherence technology, applied in the direction of testing optical performance, etc., can solve the problem of no improvement in measurement sensitivity performance

Active Publication Date: 2016-08-03
HARBIN ENG UNIV
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Problems solved by technology

The main problem to be solved is how to improve the accuracy and stability of polari...

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  • Calibration device for optical coherence polarization measurement and dynamic range calibration method thereof
  • Calibration device for optical coherence polarization measurement and dynamic range calibration method thereof
  • Calibration device for optical coherence polarization measurement and dynamic range calibration method thereof

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[0044] The present invention will be further described below in conjunction with accompanying drawing:

[0045] The invention provides a calibration device for optical coherent polarization measurement and a calibration method for its dynamic range. The high-precision calibration device includes a polarizer, a polarization analyzer, a polarization-maintaining optical fiber, multiple polarizers (analyzers) with a high-precision calibration function, and multi-section polarization-maintaining optical fibers for specific length and angle welding. The calibration method is as follows: through the selection of the length of the polarizer (analyzer) polarization-maintaining pigtail and polarization-maintaining fiber and the welding angle, the first-order interference peak and the second-order interference peak are respectively used for the small extinction ratio (0 ~ -40dB) , Large extinction ratio (-40 ~ -100dB) for precise calibration. In the case of only using the polarizer (ana...

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Abstract

The invention belongs to the technical field of optical fiber measurement, and particularly relates to a calibration device for optical coherence polarization measurement and a dynamic range calibration method thereof. The device comprises a broadband optical source and power monitoring device 510, a first optical fiber connector 521, a second optical fiber connector 522, a high-precision calibration device 530, an optical path correlator 540, and a polarization crosstalk detection and signal recording device 550. A polarization-maintaining optical fiber with a specific length and an alignment angle is used for building a calibration device, and the position and the magnitude of a measurement peak are precisely positioned; by using two-order interference peaks of multiple crosstalk points, a low peak value is precisely positioned; and by using different calibration gradients, the calibration precision and the accuracy are improved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber measurement, and in particular relates to a calibration device for optical coherent polarization measurement and a dynamic range calibration method thereof. Background technique [0002] Polarization optical devices are an important part of high-precision optical measurement and sensing systems. At present, the performance testing and evaluation methods and devices of optical devices are backward, which seriously hinders the development of high-precision optical measurement and sensing systems. For example, the chip extinction ratio of lithium niobate integrated waveguide modulator (commonly known as Y waveguide), the core device of high-precision fiber optic gyroscope, has reached more than 80dB; The rate is around 50dB (according to the definition of energy, it is 10 5 ), the highest resolution is the Model 4810 polarization extinction ratio developed by the US dBmOptics company, and the ...

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Application Information

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IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 苑勇贵梁帅杨军吴冰彭峰李创喻张俊苑立波
Owner HARBIN ENG UNIV
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