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Tunable high order anti-Stokes radiation produced by stimulated Raman scattering

University of British Columbia

Tunable high order anti-Stokes radiation produced by stimulated Raman scattering in liquid nitrogen is studied experimentally. The light beams of two lasers of different frequencies a ruby laser and tunable dye laser --.are simultaneously focussed in liquid nitrogen and two distinct series of anti-Stokes lines are observed. The dye laser anti-Stokes lines can be changed in frequency by tuning the dye laser. The intensities of the two series of lines are investigated as a function of both ruby and dye laser power, The dye laser anti-Stokes line intensities are found to have a distinct threshold for ruby laser power but no threshold for dye laser power. The experimental results support a two step model in which the ruby laser acts as a pump for molecular vibrations which in turn modulate the dye laser frequency.

Text

2010-02-21

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http://hdl.handle.net/2429/20661

Physics

University of British Columbia

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