Recent advances in pulsed HF/DF lasers

Bernard Lacour

doi:10.1117/12.515815

10 November 2003 Recent advances in pulsed HF/DF lasers

Bernard Lacour

Proceedings Volume 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2003) https://doi.org/10.1117/12.515815
Event: XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2002, Wroclow, Poland

Abstract

Recently, some noticeable effort as been realized in order to improve characteristics of HF/DF pulsed lasers. A few years ago it was supposed that the realization of a high energy HF/DF pulsed laser was only possible by using E-beam excitation, either for a non chain HF/DF gas mixture, or for a chain reaction mixture i.e. H₂/F₂ mixture. Flash lamp initiation of a high-energy chain reaction HF/DF laser was also demonstrated. However every one who wanted to make such a laser working repetitively was convinced of the difficulty of operating an E-beam system or high energy flash for large volume due to the strong electronegative character of the used gases. First attempts to realize large volume discharges have shown that this last idea was not true and that it was relatively easy to obtain homogeneous discharges in SF6 based mixture when the hydrogen donor was a hydrocarbon such as C₂H₄ or C₆H₁₂. This paper will present recent developments directed towards a better understanding of the discharge mechanisms and to an increase of the efficiency and of the specific output energy of HF/DF pulsed lasers by using chain reaction in discharge initiated repetitive and non-repetitive experiments.

Citation Download Citation

Bernard Lacour "Recent advances in pulsed HF/DF lasers", Proc. SPIE 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (10 November 2003); https://doi.org/10.1117/12.515815

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