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Proceedings Paper

Wavelength measurement of tunable TEA CO2 laser
Author(s): Yanchen Qu; Deming Ren; Xiaoyong Hu; Fengmei Liu; Lili Zhang; Chunyu Chen
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Paper Abstract

Due to their interesting physical and chemical parameters, tunable transversely excited atmospheric-pressure(TEA) CO2 lasers are widely utilized in scientific and industrial applications. The CO2 differential absorption lidar (DIAL) is an effective tool for remote measurement of pollutant gaseous concentration of the atmosphere over large areas. Many pollutant gases have strong absorption lines within the spectral range of CO2 laser wavelength tuning. In addition, the radiation of CO2 laser is well distributed in the atmosphere, coinciding with the "transparency window" of the atmosphere. Therefore the wavelength tunable TEA CO2 laser is an ideal optical source for DIAL. Most existing instruments for measuring the laser wavelength are only suitable for the measurement of continuous wave and stable frequency output. With the attempt of measuring the wavelength of pulsed TEA CO2 laser, an experimental setup is established which consists of two main portions, namely auto-scanning grating monochromator as the color dispersion system and Boxcar integrator. In the experiment of tuning TEA CO2 laser, the wavelength of CO2 laser is observed and measured by means of integrating method. The accuracy of measurement in the mid-infrared region attains 1nm.

Paper Details

Date Published: 10 January 2005
PDF: 4 pages
Proc. SPIE 5640, Infrared Components and Their Applications, (10 January 2005); doi: 10.1117/12.577289
Show Author Affiliations
Yanchen Qu, Harbin Institute of Technology (China)
Deming Ren, Harbin Institute of Technology (China)
Xiaoyong Hu, Harbin Institute of Technology (China)
Fengmei Liu, Harbin Institute of Technology (China)
Lili Zhang, Harbin Institute of Technology (China)
Chunyu Chen, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 5640:
Infrared Components and Their Applications
Haimei Gong; Yi Cai; Jean-Pierre Chatard, Editor(s)

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