, Volume 9, Issue 6, pp 509-518

Stimulated electronic Raman scattering in Cs vapour: a simple tunable laser system for the 2.7 to 3.5 μm region

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Stimulated electronic Raman scattering (SERS) in atomic vapours provides a simple method of extending the tuning ranges of pulsed dye lasers well into the infrared region. The special advantages of this technique in comparison with other types of tunable infrared lasers are discussed, and are illustrated by describing a SERS system which uses a modest nitrogen laser-pumped dye laser (∼ 20 kW). This produces infrared radiation tunable from 2.67 to 3.47μm by SERS in caesium vapour, which is contained in a heat pipe oven. Photon conversion efficiencies of up to 50% are obtained. The design of the heat pipe oven, operation of the system and optimization of experimental parameters are described in detail.