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Title: Resonantly enhanced method for generation of tunable, coherent vacuum ultraviolet radiation

Abstract

Carbon Monoxide vapor is used to generate coherent, tunable vacuum ultraviolet radiation by third-harmonic generation using a single tunable dye laser. The presence of a nearby electronic level resonantly enhances the nonlinear susceptibility of this molecule allowing efficient generation of the vuv light at modest pump laser intensities, thereby reducing the importance of a six-photon multiple-photon ionization process which is also resonantly enhanced by the same electronic level but to higher order. By choosing the pump radiation wavelength to be of shorter wavelength than individual vibronic levels used to extend tunability stepwise from 154.4 to 124.6 nm, and the intensity to be low enough, multiple-photon ionization can be eliminated. Excitation spectra of the third-harmonic emission output exhibit shifts to shorter wavelength and broadening with increasing CO pressure due to phase matching effects. Increasing the carbon monoxide pressure, therefore, allows the substantial filling in of gaps arising from the stepwise tuning thereby providing almost continuous tunability over the quoted range of wavelength emitted.

Inventors:
 [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865522
Patent Number(s):
4529944
Assignee:
United States of America as represented by Department of Energy (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
resonantly; enhanced; method; generation; tunable; coherent; vacuum; ultraviolet; radiation; carbon; monoxide; vapor; generate; third-harmonic; single; dye; laser; presence; nearby; electronic; level; enhances; nonlinear; susceptibility; molecule; allowing; efficient; vuv; light; modest; pump; intensities; reducing; importance; six-photon; multiple-photon; ionization; process; choosing; wavelength; shorter; individual; vibronic; levels; extend; tunability; stepwise; 154; 124; nm; intensity; eliminated; excitation; spectra; emission; output; exhibit; shifts; broadening; increasing; pressure; due; phase; matching; effects; allows; substantial; filling; gaps; arising; tuning; providing; continuous; quoted; range; emitted; pressure due; phase matching; monoxide pressure; pump laser; vacuum ultraviolet; dye laser; ultraviolet radiation; carbon monoxide; shorter wavelength; third-harmonic generation; vuv light; single tunable; tunable dye; laser intensities; pump radiation; resonantly enhanced; harmonic generation; radiation wavelength; generate coherent; enhanced method; /359/

Citation Formats

Glownia, James H., and Sander, Robert K. Resonantly enhanced method for generation of tunable, coherent vacuum ultraviolet radiation. United States: N. p., 1985. Web.
Glownia, James H., & Sander, Robert K. Resonantly enhanced method for generation of tunable, coherent vacuum ultraviolet radiation. United States.
Glownia, James H., and Sander, Robert K. Tue . "Resonantly enhanced method for generation of tunable, coherent vacuum ultraviolet radiation". United States. https://www.osti.gov/servlets/purl/865522.
@article{osti_865522,
title = {Resonantly enhanced method for generation of tunable, coherent vacuum ultraviolet radiation},
author = {Glownia, James H. and Sander, Robert K.},
abstractNote = {Carbon Monoxide vapor is used to generate coherent, tunable vacuum ultraviolet radiation by third-harmonic generation using a single tunable dye laser. The presence of a nearby electronic level resonantly enhances the nonlinear susceptibility of this molecule allowing efficient generation of the vuv light at modest pump laser intensities, thereby reducing the importance of a six-photon multiple-photon ionization process which is also resonantly enhanced by the same electronic level but to higher order. By choosing the pump radiation wavelength to be of shorter wavelength than individual vibronic levels used to extend tunability stepwise from 154.4 to 124.6 nm, and the intensity to be low enough, multiple-photon ionization can be eliminated. Excitation spectra of the third-harmonic emission output exhibit shifts to shorter wavelength and broadening with increasing CO pressure due to phase matching effects. Increasing the carbon monoxide pressure, therefore, allows the substantial filling in of gaps arising from the stepwise tuning thereby providing almost continuous tunability over the quoted range of wavelength emitted.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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