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Optical Engineering

Research on laser wavelength measurement with rotating Fabry–Perot mirror
Author(s): Zhaoshuo Tian; Zhenghe Sun; Yanchao Zhang; Shiyou Fu
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Paper Abstract

A method using rotating Fabry–Perot (FP) mirror to measure CO2 laser wavelength was developed. The variation of FP transmittance changing with laser incident angle was calculated theoretically and the variation curve was given. The calculation illustrates that the variation of FP reflectance with incident angle 0 to 30 deg has little effect on the transmittance of FP. In the experiments, the CO2 laser transmittance variation of FP was measured at a wavelength of 9.27 μm. To improve the measurement precision of the laser wavelength, the method using the centrosymmetric peaks of FP transmittance curve in the range from −20 to +20  deg of laser incident angle was proposed. The precision of the measurement is about 0.01 μm. The experiment result is consistent with theoretical analysis, which demonstrates the feasibility of the laser wavelength measurement using rotating FP method.

Paper Details

Date Published: 15 July 2014
PDF: 3 pages
Opt. Eng. 53(7) 074107 doi: 10.1117/1.OE.53.7.074107
Published in: Optical Engineering Volume 53, Issue 7
Show Author Affiliations
Zhaoshuo Tian, Harbin Institute of Technology in Weihai (China)
Zhenghe Sun, Harbin Institute of Technology at Weihai (China)
Yanchao Zhang, Harbin Institute of Technology at Weihai (China)
Shiyou Fu, Harbin Institute of Technology in Weihai (China)

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