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Time-Resolved and Frequency-Resolved Laser Spectroscopy in Free and Perturbed Atoms

Caiyan, Luo (1996)
Abstract
Time-resolved VUV laser spectroscopy has been performed to determine radiative lifetimes of several elements in atomic-beam systems. VUV radiation was generated by means of resonant four-wave mixing and stimulated anti-Stokes Raman shifting. Several methods to produce free atoms are presented and different techniques to determine radiative lifetimes are discussed.



Doppler-free laser spectroscopy is discussed for optically thin samples. High-contrast laser spectroscopy was introduced for optically thick samples. Results from a single sodium cell and two cells in tandem are presented. Subnatural linewidths down to 50% of the natural linewidths were obtained in a special experimental arrangement. The temporal behaviour of... (More)
Time-resolved VUV laser spectroscopy has been performed to determine radiative lifetimes of several elements in atomic-beam systems. VUV radiation was generated by means of resonant four-wave mixing and stimulated anti-Stokes Raman shifting. Several methods to produce free atoms are presented and different techniques to determine radiative lifetimes are discussed.



Doppler-free laser spectroscopy is discussed for optically thin samples. High-contrast laser spectroscopy was introduced for optically thick samples. Results from a single sodium cell and two cells in tandem are presented. Subnatural linewidths down to 50% of the natural linewidths were obtained in a special experimental arrangement. The temporal behaviour of high-contrast laser spectroscopy has also been studied. Some unexpected results were observed. The density matrix equation was used to explain the experimental results.



Energy transfer processes due to inelastic collisions were studied at even higher densities using CW lasers. Several precautions are discussed in detail in order to obtain accurate energy transfer cross sections. Energy transfer cross sections for several processes were derived. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Dr. Mannervik, Sven, Manne Siegbahn Institutet, Frescativägen 24, 104 05 Stockholm
publishing date
type
Thesis
publication status
published
subject
keywords
Time-resolved laser spectroscopy, Raman shifting, four-wave mixing, Doppler-free laser spectroscopy, high-contrast laser spectroscopy, optically thick sample, energy transfer cross section, natural linewidth, Fysicumarkivet A:1996:Caiyan, Atom- och molekylärfysik, Atomic and molecular physics, VUV radiation
pages
56 pages
publisher
Atomic Physics, Department of Physics, Lund University
defense location
Sal B, Fysicum, Lund
defense date
1996-05-10 10:15
external identifiers
  • Other:LUTFD2/(TFAF-1029)/1-55/(1996)
ISBN
91-628-2023-0
language
English
LU publication?
no
id
e040d06b-849b-416e-b721-0f0447b95a45 (old id 28418)
date added to LUP
2007-06-12 11:24:32
date last changed
2016-09-19 08:45:02
@misc{e040d06b-849b-416e-b721-0f0447b95a45,
  abstract     = {Time-resolved VUV laser spectroscopy has been performed to determine radiative lifetimes of several elements in atomic-beam systems. VUV radiation was generated by means of resonant four-wave mixing and stimulated anti-Stokes Raman shifting. Several methods to produce free atoms are presented and different techniques to determine radiative lifetimes are discussed.<br/><br>
<br/><br>
Doppler-free laser spectroscopy is discussed for optically thin samples. High-contrast laser spectroscopy was introduced for optically thick samples. Results from a single sodium cell and two cells in tandem are presented. Subnatural linewidths down to 50% of the natural linewidths were obtained in a special experimental arrangement. The temporal behaviour of high-contrast laser spectroscopy has also been studied. Some unexpected results were observed. The density matrix equation was used to explain the experimental results.<br/><br>
<br/><br>
Energy transfer processes due to inelastic collisions were studied at even higher densities using CW lasers. Several precautions are discussed in detail in order to obtain accurate energy transfer cross sections. Energy transfer cross sections for several processes were derived.},
  author       = {Caiyan, Luo},
  isbn         = {91-628-2023-0},
  keyword      = {Time-resolved laser spectroscopy,Raman shifting,four-wave mixing,Doppler-free laser spectroscopy,high-contrast laser spectroscopy,optically thick sample,energy transfer cross section,natural linewidth,Fysicumarkivet A:1996:Caiyan,Atom- och molekylärfysik,Atomic and molecular physics,VUV radiation},
  language     = {eng},
  pages        = {56},
  publisher    = {ARRAY(0x9787648)},
  title        = {Time-Resolved and Frequency-Resolved Laser Spectroscopy in Free and Perturbed Atoms},
  year         = {1996},
}