Optical pumping of chemical HF lasers on the basis of NF3—H2and ClF5—H2mixtures by an open surface discharge in the bleaching-wave mode
| Autor: | Mikhail Yu Artem'ev, A. S. Bashkin, Marc Sentis, V I Cheremiskin, V M Nesterov, L D Mikheev |
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| Rok vydání: | 2001 |
| Předmět: |
Materials science
Active laser medium business.industry Photodissociation Statistical and Nonlinear Physics Laser pumping Laser Chemical laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Optical pumping Optics law Torr Electrical and Electronic Engineering Atomic physics business Lasing threshold |
| Zdroj: | Quantum Electronics. 31:611-616 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2001v031n07abeh002013 |
| Popis: | Lasing on HF upon optical pumping by emission of an open discharge, using NF3 and ClF5 as donors of fluorine atoms, was obtained for the first time in a chemical laser and the bleaching-wave mode was realised in a chemical HF laser. An open surface discharge was used as a pump source. The velocity of the bleaching wave, which was formed under its action, reached ~8 km s-1. The formation of this wave leads to a rapid (with an ultrasonic velocity) replacement of the working medium in the lasing region, which provides a quantum laser efficiency close to unity. The optimum compo-sition of the working mixture was found to be NF3:H2:Kr =6:10:125 Torr. For this composition, the output laser energy in a 3.2-μs pulse reached ~0.4 J and the specific output energy was 3.5 J litre-1. Approximately the same output characteristics of laser emission (0.35 J in a 3.5-μs pulse in the ClF5:H2:Kr=3:20:50 Torr mixture) were obtained in the system using ClF5 as donors of fluorine atoms. |
| Databáze: | OpenAIRE |
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