Modified simplified rate equation model of  flowing chemical oxygen-iodine laser and its application

Hai-Xing Yan; Li-Min Hu; Zhi Gao

doi:10.1117/12.515584

10 November 2003 Modified simplified rate equation model of a flowing chemical oxygen-iodine laser and its application

Hai-Xing Yan, Li-Min Hu, Zhi Gao

Proceedings Volume 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2003) https://doi.org/10.1117/12.515584
Event: XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2002, Wroclow, Poland

Abstract

A modified simplified rate equation (RE) model of flowing chemical oxygen-iodine laser (COIL), which is adapted to both the condition of homogeneous broadening and inhomogeneous broadening being of importance and the condition of inhomogeneous broadening being predominant, is presented for performance analyses of a COIL. By using the Voigt profile function and the gain-equal-loss approximation, a gain expression has been deduced from the rate equations of upper and lower level laser species. This gain expression is adapted to the conditions of very low gas pressure up to quite high pressure and can deal with the condition of lasing frequency being not equal to the central one of spectral profile. The expressions of output power and extraction efficiency in a flowing COIL can be obtained by solving the coupling equations of the deduced gain expression and the energy equation which expresses the complete transformation of the energy stored in singlet delta state oxygen into laser energy. By using these expressions, the RotoCOIL experiment is simulated, and obtained results agree well with experiment data. Effects of various adjustable parameters on the performances of COIL are also presented.

Citation Download Citation

Hai-Xing Yan, Li-Min Hu, and Zhi Gao "Modified simplified rate equation model of a flowing chemical oxygen-iodine laser and its application", Proc. SPIE 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (10 November 2003); https://doi.org/10.1117/12.515584

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