New Nonlinear Optical Processes in Molecules at Infrared Frequencies.
Abstract
This second annual report details progress in the study of optical nonlinearities in molecules at infrared wavelengths. The objectives are to minimize the adverse effects of absorption in both triply resonant (1-, 2-, and 3-photon resonances) and two-photon resonant systems. A second objective is to examine molecules which have unusually strong and narrow Raman active modes at the two-photon resonance frequency. The experimental technique is to measure third harmonic generation in the molecular gas using a step tunable CO2 TEA laser. Results were obtained for CD4 at room temperature. The pressure, power, and frequency dependence of the third harmonic signal was measured. Problems were encountered as the fundamental absorption limited the ultimate conversion efficiency. Further experiments are proposed to be conducted at low temperatures which should alleviate this problem. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 20, 1981
- Accession Number
- ADA096957
Entities
People
- Michael F. Becker
Organizations
- University of Texas at Austin