Shifting of infrared radiation using rotational Raman resonances in diatomic molecular gases
Patent
·
OSTI ID:5795588
The invention discloses 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., either H/sub 2/ or D/sub 2/, 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.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- None
- OSTI ID:
- 5795588
- Country of Publication:
- United States
- Language:
- English
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