Investigations of a photo-triggered HF laser

F. Doussiet; M. Legentil; S. Pasquiers; C. Postel; Vincent Puech; Laurent Richeboeuf

doi:10.1117/12.236870

29 March 1996 Investigations of a photo-triggered HF laser

F. Doussiet, M. Legentil, S. Pasquiers, C. Postel, Vincent Puech, Laurent Richeboeuf

Author Affiliations +

Proceedings Volume 2702, Gas and Chemical Lasers; (1996) https://doi.org/10.1117/12.236870
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

X-ray photo-triggered discharges have been used to energetize Ne/SF₆/H₂ and Ne/SF₆/C₂H₆ gas mixtures. For a discharge volume of 312 cm³ an output energy as high as 3.0 J has been obtained in the ethane mixture, while the best laser performance achieved in the hydrogen mixture is only 1.8 J. The physical reasons which could explain these differences, i.e. different kinetic pathways leading to the formation of the HF molecule, or the onset of discharge instabilities, have been investigated. It is shown, experimentally and theoretically, that the production of atomic fluorine weakly depends on the gas mixture type. A time resolved imagery of the interelectrodes space emphasized that the Ne/SF₆/H₂ active medium degenerates into a spatially inhomogeneous plasma, whereas a very stable homogeneous discharge is obtained in the Ne/SF₆/C₂H₆ mixture. As a result the onset of a discharge instability is responsible for the laser emission collapse at low hydrogen partial pressure and high initial applied electric field values.

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F. Doussiet, M. Legentil, S. Pasquiers, C. Postel, Vincent Puech, and Laurent Richeboeuf "Investigations of a photo-triggered HF laser", Proc. SPIE 2702, Gas and Chemical Lasers, (29 March 1996); https://doi.org/10.1117/12.236870

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