Influence of multi-photon ionization of Xe on a XeF discharge induced by KrF laser irradiation
Abstract
Excimer laser preionization induced by an external laser was investigated for XeF excimer laser discharge induced by a KrF laser, paying attention to the ionized species in the gas. Enhancement of amplified spontaneous emission (ASE) was observed for XeF gas discharge preionized by a KrF laser with and without its irradiation. In contrast, no ASE enhancement was observed for KrF gas discharge with KrF laser preionization. ASE enhancement was larger for the longer wavelength, which was close to the two-photon resonance of the Xe atom, when tunable KrF laser irradiation was used. These results indicate that multi-photon ionization of Xe atoms supplied the initial electrons to the laser-induced preionization.
- Publication:
-
Applied Physics B: Lasers and Optics
- Pub Date:
- October 2009
- DOI:
- 10.1007/s00340-009-3567-z
- Bibcode:
- 2009ApPhB..97..511T
- Keywords:
-
- 32.80.Rm;
- 42.55.Lt;
- 52.80.Hc;
- Multiphoton ionization and excitation to highly excited states;
- Gas lasers including excimer and metal-vapor lasers;
- Glow;
- corona