Measurement method of temperature coefficient of photoelectric receiver based on dual-frequency laser unbiased splitting

A photoelectric receiver and dual-frequency laser technology, applied in the field of laser applications, can solve the problem of not considering the temperature drift error of the electrical signal processing circuit, the analysis and experimental testing of the temperature characteristics of the electrical signal processing circuit, and affecting the test accuracy of the heterodyne interference system, etc. question

Active Publication Date: 2016-04-27
HARBIN INST OF TECH
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Problems solved by technology

However, this literature only considered the photodetector in the analysis, and did not consider the temperature drift error introduced by the electrical signal processing circuit as the temperature changes
[0004] At present, the research on the temperature characteristics of the photoelectric receiver only analyzes the temperature characteristics of the photodetection device in the photoelectric receiver, and does not analyze and test the temperature characteristics of the electrical signal processing circuit of the photoelectric receiver.
In actual use, the electrical signal processing circuit is affected by temperature so that the output signal will have a certain phase drift with temperature changes, which will affect the test accuracy of the heterodyne interferometric system

Method used

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  • Measurement method of temperature coefficient of photoelectric receiver based on dual-frequency laser unbiased splitting
  • Measurement method of temperature coefficient of photoelectric receiver based on dual-frequency laser unbiased splitting

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Embodiment Construction

[0022] The examples of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] A method for testing the temperature coefficient of a photoelectric receiver based on dual-frequency laser unbiased light splitting, the steps of the method are as follows:

[0024] (1) Put the standard photoelectric receiver 6 into the temperature-adjustable incubator A8, and put the photoelectric receiver 7 to be tested into the temperature-adjustable incubator B9. The temperature stability of the incubators A and B can reach ±0.1 °C, has no effect on the phase stability of the standard photoelectric receiver 6 and the photoelectric receiver 7 to be tested;

[0025] (2) The dual-frequency laser 1 emits a beam including frequencies v 1 and v 2 The dual-frequency laser, the polarization directions are mutually orthogonal linearly polarized light in the horizontal direction and the vertical direction respectively, and the dual-frequency laser ...

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Abstract

The invention belongs to a laser application technology, and relates to a photoelectric receiver temperature coefficient test method based on non-polarized beam splitting of a dual-frequency laser. The method includes using the dual-frequency laser as a light source, utilizing a non-polarized beam splitting prism for beam splitting, and testing phase difference between a to-be-tested photoelectric receiver and a reference photoelectric receiver at difference temperatures to obtain temperature coefficient of the to-be-tested photoelectric receiver. The method has the advantages that phases of a reference light beam and a measurement light beam are unaffected by external environment changes in testing, extra phase errors are not introduced, and test accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of laser applications, and mainly relates to a method for testing the temperature coefficient of a photoelectric receiver based on dual-frequency laser unbiased light splitting. Background technique [0002] Due to its high sensitivity, high precision and non-contact characteristics, laser interferometry occupies an increasingly important application position in the fields of precision and ultra-precision processing, microelectronics equipment, nanotechnology and other cutting-edge industrial equipment and national defense equipment, and has been widely used . [0003] In the laser heterodyne interferometry system, the photoelectric receiver plays an important role in realizing signal reception and signal conversion, and its performance, especially the temperature drift characteristics, will directly affect the measurement stability and measurement accuracy of the entire measurement system. In order to stud...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J9/02
Inventor 胡鹏程谭久彬杨千惠
Owner HARBIN INST OF TECH
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