Shifting of infrared radiation using rotational raman resonances

Details Shifting of infrared radiation using rotational raman resonances Shifting of infrared radiation using rotational raman resonances

1978-11-13

1980-03-18

Sikes, William L.

Oscillators

Molecular or particle resonant type

331 945G, 307424, H01S 322

Patent

active

041941705

ABSTRACT:
A device for shifting the frequency of infrared radiation from a CO.sub.2 laser by stimulated Raman scattering in either H.sub.2 or D.sub.2. The device of the preferred embodiment comprises an H.sub.2 Raman laser having dichroic mirrors which are reflective for 16 .mu.m radiation and transmittive for 10 .mu.m, disposed at opposite ends of an interaction cell. The interaction cell contains a diatomic molecular gas, e.g., H.sub.2, D.sub.2, T.sub.2, HD, HT, DT 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 CO.sub.2 radiation is circularly polarized using a Fresnel rhomb .lambda./4 plate and applied to an interaction cell of much longer length for single pass operation.

REFERENCES:
patent: 3655993 (1972-04-01), Wolff
patent: 3705992 (1972-12-01), Ippen et al.
Byer et al., 16 .mu.m Generation by CO.sub.2 -Pumped Rotational Raman Scattering in H.sub.2 Optics Letts. vol. 3, No. 4 (Oct. 1978) pp. 144-146. _
Rabinowitz et al., Stimulated Rotational Ramon Scattering From Para-H.sub.2 Pumped by a CO.sub.2 TEA Laser, Optics Letts., vol. 3, No. 4 (Oct. 1978) pp. 147-148. _
Rabinowitz et al., Waveguide H.sub.2 Raman Laser, Applied Optics, vol. 15, No. 9 (Sept. 1976) pp. 2005-2006. _
CRC Handbookof Lasers, Pressley, Ed. The Chemical Rubber Co., Cleveland Ohio (1971) p. 528.

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