Shifting of co.sub.2 laser radiation using rotational raman...

Details Shifting of co.sub.2 laser radiation using rotational raman... Shifting of co.sub.2 laser radiation using rotational raman...

H - Electricity

01

S

345/39

H01S 3/22 (2006.01) H01S 3/10 (2006.01) H01S 3/30 (2006.01)

Patent

CA 1089066

ABSTRACT OF THE DISCLOSURE A device for shifting the frequency of infrared radiation from a CO2 laser by stimulated Raman scattering in either H2 or D2. The device of the preferred embodiment comprises an H2 Raman laser having dichroic mirrors which are reflective for 16 µm radiation and transmittive for 10 µm, disposed at opposite ends of an interaction cell. The interaction cell contains a diatomic molecular gas, e.g., either H2 or D2, and a capillary waveguide disposed within the cell. A liquid nitrogen jacket is provided around the capillary waveguide for the purpose of cooling. In another embodiment the input CO2 radiation is circularly polar- ized using a Fresnel rhomb .lambda./4 plate and applied to an inter- action cell of much longer length for single pass operation. - 1 -

302478

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