Photoelectric receiver temperature coefficient test method based on acousto-optical amplitude modulation
A technology of a photoelectric receiver and a test method, applied in the field of laser applications, can solve the problem of temperature characteristic analysis and experimental test of the electric signal processing circuit without considering the temperature drift error of the electric signal processing circuit, and the influence of the heterodyne interference system without the photoelectric receiver. Test accuracy and other issues
Active Publication Date: 2013-09-11
HARBIN INST OF TECH
View PDF7 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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. There is no analysis and experimental test of the temperature characteristics of the electrical signal processing circuit of the photoelectric receiver. Test the temperature characteristics of the photoelectric receiver when the input interference beat frequency is different
In actual use, the electrical signal processing circuit is affected by the temperature so that the output signal will have a certain phase drift with the temperature change, and when the input light intensity is different, the output signal will also have a certain phase drift. Ignoring this part of the error will affect the heterodyne Test accuracy of interferometric systems
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] The examples of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] A method for testing the temperature coefficient of a photoelectric receiver based on acousto-optic amplitude modulation, the steps of the method are as follows:
[0026] (1) Put the standard photoelectric receiver 7 into the temperature-adjustable incubator A9, and put the photoelectric receiver 8 to be tested in the temperature-adjustable incubator B10. 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 7 and the photoelectric receiver 8 to be tested;
[0027] (2) The single-frequency laser 1 emits a beam of laser light, and after passing through the acousto-optic modulator 2, it becomes a beam including frequencies v 1 and v 2 The dual-frequency laser beam, the polarization directions are mutually orthogonal linearly polarized light in the horiz...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM
Login to view more Abstract
The invention belongs to a laser application technology, and relates to a photoelectric receiver temperature coefficient test method based on acousto-optical amplitude modulation. The method includes using a single-frequency laser as a light source, outputting an amplitude-adjustable double-frequency laser after the single-frequency laser passes an acousto-optical modulator, 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 different temperatures to obtain temperature coefficient of the to-be-tested photoelectric receiver. 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, test accuracy is high, and the temperature coefficient of photoelectric receivers in different light intensities can be tested by means of adjusting light intensity of the double-frequency laser.
Description
technical field [0001] The invention belongs to laser application technology, and mainly relates to a method for testing the temperature coefficient of a photoelectric receiver based on acousto-optic amplitude modulation. 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 study the temperature drift ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Application Information
Patent Timeline
Login to view more Patent Type & Authority Applications(China)
IPC IPC(8): G01J9/02
Inventor 谭久彬胡鹏程杨千惠
Owner HARBIN INST OF TECH
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap