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- Title
Generation of lower and higher harmonics in different plasma media with small Z.
- Authors
Ganeev, R.; Kuroda, H.
- Abstract
The generation of lower (third) and higher harmonics of femtosecond laser radiation in plasmas produced by laser ablation of different targets with a small atomic number Z (B, Be, Li) has been investigated. The high (10) efficiency of third-harmonic generation was observed in plasma produced on the boron surface. Efficient third-harmonic generation was also observed in beryllium plasma using femtosecond pulses of Ti:sapphire laser radiation (λ = 790 nm) and its second harmonic (395 nm). We could tune the higher harmonics generation spectrum by tuning the crystal converter when using 395-nm radiation to be converted. It is shown that, in plasmas formed on targets with small Z, the conversion efficiency and limiting generated harmonic order depend on the delay between the ablation pulse and the pulse to be converted.
- Subjects
ELECTRICAL harmonics; PLASMA gases; FEMTOSECOND lasers; SURFACES (Technology); BORON; SPECTRUM analysis; LASER ablation
- Publication
Optics & Spectroscopy, 2010, Vol 109, Issue 6, p921
- ISSN
0030-400X
- Publication type
Article
- DOI
10.1134/S0030400X10120179