University of Illinois Urbana-Champaign

An Optically-Pumped Frequency Stable Tunable Maser and Infrared-Microwave Double-Resonance Experiments in Ammonia

Malk, Edward George

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Description

Title
An Optically-Pumped Frequency Stable Tunable Maser and Infrared-Microwave Double-Resonance Experiments in Ammonia
Author(s)
Malk, Edward George
Issue Date
1980
Department of Study
Electrical Engineering
Discipline
Electrical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Molecular
Language
eng
Abstract
  • Microwave emission attributed to a linear cascade effect has been observed from ('14)NH(,3) optically pumped by a CO(,2) laser. The emission is tunable over the saturated homogeneous linewidth of the ground state sQ(5,4) inversion transition at 22.653 GHz. The circulating power density of the optically pumped emission is 0.54 watts/cm('2) at NH(,3) pressure of 0.91 torr and CO(,2) R(6)(,10) laser pulse energy of 60 mJ. The cell design and frequency characteristics are presented as an Appendix.
  • Infrared-microwave double-resonance experiments have been performed at higher microwave powers than reported in the literature. Two previously unreported double-resonances have been observed using a CO(,2) laser, aQR(2,1) (P(40)(,9) + 33.05 GHz) and aQR(2,2) (P(40)(,9) + 34.14 GHz). The cells designed and the data acquisition techniques developed are presented.
  • The linear and non-linear (i.e., single and multiple photon) spectroscopy of ('14)NH(,3) is considered in detail as the subject of an Appendix. Tables of energy levels, ground state inversion transitions, and laser-NH(,3) absorption matches are also included.
Graduation Semester
1980
Type of Resource
text
Permalink
http://hdl.handle.net/2142/66233

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