Importance of focusing geometry with stimulated Raman scattering of Nd:YAG laser light in methane
D J Brink; H P Burger; T N de Kock; J A Strauss; D R Preussler; D J Brink; Div. of Opt. Sci., Council for Sci. & Ind. Res., Pretoria, South Africa; H P Burger; Div. of Opt. Sci., Council for Sci. & Ind. Res., Pretoria, South Africa; T N de Kock; Div. of Opt. Sci., Council for Sci. & Ind. Res., Pretoria, South Africa; J A Strauss; Div. of Opt. Sci., Council for Sci. & Ind. Res., Pretoria, South Africa; D R Preussler; Div. of Opt. Sci., Council for Sci. & Ind. Res., Pretoria, South Africa
Журнал:
Journal of Physics D: Applied Physics
Дата:
1986-08-14
Аннотация:
The output wavelength of a small pulsed Nd:YAG laser can be converted with good efficiency to an eye-safe region at 1.54 mu m using stimulated Raman scattering in compressed methane. In the presence of limiting factors such as medium depletion, stimulated Brillouin scattering and gas breakdown, the conversion is strongly intensity dependent and the focusing geometry must be chosen with care. Experimental and theoretical results are presented to illustrate and quantify these effects.
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