Coherent propagation and sum frequency generation into the vacuum ultraviolet
Abstract
An experimental and theoretical study of resonant coherent four wave mixing has been initiated. Prior theoretical investigation by the author has demonstrated that coherent propagation effects can be used to keep all the energy in the radiation field, even in the presence of resonant absorption. An energy conversion efficiency of 6% was predicted for third harmonic conversion in lithium to 190 nm. In the period covered. (1) Constructed a dye laser amplifier, and achieved an output of 1 mJ for wavelengths covering the most important resonances of lithium (571 nm, 672 nm, 639 nm); (2) Purchased and assembled the hardware of a data acquisition system to accurately characterize each pulse (amplitude, duration, phase modulation) and perform the measurement of two photon absorption and third harmonic as a function of the relative phase and delay in the pulse sequence; (3) Investigated the feasibility of increasing the conversion efficiency through the use of natural or induced autoionizing resonances; and (4) Made a theoretical study of the influence of coherence on three photon ionization in lithium.
- Publication:
-
Final Report
- Pub Date:
- October 1982
- Bibcode:
- 1982ntsu.rept.....D
- Keywords:
-
- Coherent Electromagnetic Radiation;
- Far Ultraviolet Radiation;
- Vacuum;
- Wave Propagation;
- Feasibility Analysis;
- Harmonic Generators;
- Lithium;
- Metal Vapors;
- Sums;
- Communications and Radar