Design and fabrication of confocal fabry-perot interferometers used in laser-ultrasonic detection

DING Hongsheng; TONG Lige; BAI Shiwu

doi:10.13374/j.issn1001-053x.2005.03.021

Volume 27 Issue 3

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DING Hongsheng, TONG Lige, BAI Shiwu. Design and fabrication of confocal fabry-perot interferometers used in laser-ultrasonic detection[J]. Chinese Journal of Engineering, 2005, 27(3): 338-341. doi: 10.13374/j.issn1001-053x.2005.03.021

Citation:

DING Hongsheng, TONG Lige, BAI Shiwu. Design and fabrication of confocal fabry-perot interferometers used in laser-ultrasonic detection[J]. Chinese Journal of Engineering, 2005, 27(3): 338-341. doi: 10.13374/j.issn1001-053x.2005.03.021

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Design and fabrication of confocal fabry-perot interferometers used in laser-ultrasonic detection

doi: 10.13374/j.issn1001-053x.2005.03.021

1. Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
2. Mechanical Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
3. Pipeline Research Institute of China National Petroleum Corporation, China

Received Date: 2004-01-08
Rev Recd Date: 2004-04-26

Available Online: 2021-08-17

Abstract

Abstract

The main optical parameters of Confocal Fabry-Perot Interferometers (CFPI), including free spectral range, minimum resolvable frequency difference (instrumental bandpass), finesse, spectral resolving power, were discussed. According to the requirement and feature of laser-ultrasonic detection, a CFPI used in laboratory was designed and fabricated. The CFPI's cavity length and operation point were controlled by a micro-single computer. Laser-ultrasonic non-contact detection is carried out successfully with the CFBI.
- confocal Fabry-Perot interferometer,
- optical parameter,
- laser ultrasonic detection