Study of VUV Generation by Coherent Resonant Frequency Mixing in Metal Vapors.
Abstract
The properties of multiphoton resonances (two, four, or more) are exploited to enhance up frequency conversion rates. Simultaneously, the property of reversibility of coherent interaction is used to minimize the resonant losses (two-photon, four-photon absorption). A source of tunable, near bandwidth limited pulses, of more than a millijoule energy per pulse has been developed. A new scheme of computer controlled data acquisition made it possible to analyze, for the first time, the temporal coherence properties of the amplified pulses (at a rate of 20 pps). The method of interferometric autocorrelation has been applied to the study of multiphoton coherences, leading to the first measurement of the phase angle of the third order susceptibility. Experimental demonstration of coherent enhancement of harmonic generation was made. A conversion efficiency of 1% was achieved for third harmonic generation in lithium vapor, which is the maximum efficiency predicted by the theory for this system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 24, 1986
- Accession Number
- ADA168691
Entities
People
- Jean-claude Diels
Organizations
- University of North Texas