Observation of new FIR superradiant lines from optically pumped D2O
Abstract
Four previously unobserved superradiant emission lines from D2O vapor, optically pumped by a pulsed TEA CO2 laser, are reported. The wavelengths are 235, 280, 97, and 98 microns. The far infrared emissions resulted from absorption of the R22, R32, and R30 CO2 lines. An agreement of observed and predicted polarization is observed. The experimental procedure measures forward emission energy output only; if it is assumed that an equal amount is emitted in the backwards direction, a quantum conversion efficiency of approximately 38% at 99 microns is indicated for the observed wavelength at 98 microns.
- Publication:
-
IEEE Journal of Quantum Electronics
- Pub Date:
- October 1977
- DOI:
- 10.1109/JQE.1977.1069244
- Bibcode:
- 1977IJQE...13..811L
- Keywords:
-
- Far Infrared Radiation;
- Gas Lasers;
- Heavy Water;
- Infrared Lasers;
- Optical Pumping;
- Carbon Dioxide Lasers;
- Energy Conversion Efficiency;
- Laser Outputs;
- Laser Pumping;
- Line Spectra;
- Luminous Intensity;
- Polarization Characteristics;
- Radiance;
- Tea Lasers;
- Water Vapor;
- Lasers and Masers