Two-stage Raman converter covering the whole infrared spectrum with tunable solid-state lasers
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- Wada, S., Tashiro, H., Urata, Y. et al. Appl. Phys. B (1993) 57: 435. doi:10.1007/BF00357388
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A two-stage Raman-conversion system pumped with a Q-switched alexandrite laser is proposed for the generation of broadly tunable infrared radiation. The first stage is a high-pressure Raman cell which accepts a pump beam in long-focusing or parallel-beam geometry, while the successive second one is made of a multi-pass Raman cell with repeated focusing. Using a selected combination of vibrational or rotational Raman shifting by H2, a spectrum ranging from 0.75 μm to 15 μm can be covered by this system.