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Title: Role of excited state photoionization in the 852.1 nm Cs laser pumped by Cs-Ar photoassociation

Abstract

Photoionization of Cs (6p {sup 2}P{sub 3/2}) atoms during the operation of a Cs D{sub 2} line (852.1 nm: 6p {sup 2}P{sub 3/2}{yields}6s {sup 2}S{sub 1/2}) laser, pumped by free{yields}free transitions of thermal Cs-Ar ground state pairs, has been investigated experimentally and computationally. Photoexcitation of Cs vapor/Ar mixtures through the blue satellite of the D{sub 2} transition (peaking at 836.7 nm) selectively populates the {sup 2}P{sub 3/2} upper laser level by the dissociation of the CsAr excited complex. Comparison of laser output energy data, for instantaneous pump powers up to 3 MW, with the predictions of a numerical model sets an upper bound of 8 Multiplication-Sign 10{sup -26} cm{sup 4} W{sup -1} on the Cs (6p {sup 2}P{sub 3/2}) two photon ionization cross-section at 836.7 nm which corresponds to a single photon cross-section of 2.4 Multiplication-Sign 10{sup -19} cm{sup 2} for a peak pump intensity of 3 MW cm{sup -2}.

Authors:
; ;  [1]; ;  [2]; ; ;  [3]
  1. Laboratory for Optical Physics and Engineering, Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801 (United States)
  2. Department of Engineering Physics, U.S. Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433 (United States)
  3. CU Aerospace, Champaign, Illinois 61802 (United States)
Publication Date:
OSTI Identifier:
22162788
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 102; Journal Issue: 11; Other Information: (c) 2013 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ARGON; ATOMS; CESIUM; COMPARATIVE EVALUATIONS; CROSS SECTIONS; DISSOCIATION; EXCITED STATES; GROUND STATES; LASER RADIATION; MIXTURES; OPERATION; OPTICAL PUMPING; PHOTOCHEMISTRY; PHOTOIONIZATION; PHOTONS; SATELLITES

Citation Formats

Hewitt, J. D., Houlahan, Jr., T. J., Eden, J. G., Gallagher, J. E., Perram, G. P., Carroll, D. L., Palla, A. D., and Verdeyen, J. T. Role of excited state photoionization in the 852.1 nm Cs laser pumped by Cs-Ar photoassociation. United States: N. p., 2013. Web. doi:10.1063/1.4796040.
Hewitt, J. D., Houlahan, Jr., T. J., Eden, J. G., Gallagher, J. E., Perram, G. P., Carroll, D. L., Palla, A. D., & Verdeyen, J. T. Role of excited state photoionization in the 852.1 nm Cs laser pumped by Cs-Ar photoassociation. United States. doi:10.1063/1.4796040.
Hewitt, J. D., Houlahan, Jr., T. J., Eden, J. G., Gallagher, J. E., Perram, G. P., Carroll, D. L., Palla, A. D., and Verdeyen, J. T. Mon . "Role of excited state photoionization in the 852.1 nm Cs laser pumped by Cs-Ar photoassociation". United States. doi:10.1063/1.4796040.
@article{osti_22162788,
title = {Role of excited state photoionization in the 852.1 nm Cs laser pumped by Cs-Ar photoassociation},
author = {Hewitt, J. D. and Houlahan, Jr., T. J. and Eden, J. G. and Gallagher, J. E. and Perram, G. P. and Carroll, D. L. and Palla, A. D. and Verdeyen, J. T.},
abstractNote = {Photoionization of Cs (6p {sup 2}P{sub 3/2}) atoms during the operation of a Cs D{sub 2} line (852.1 nm: 6p {sup 2}P{sub 3/2}{yields}6s {sup 2}S{sub 1/2}) laser, pumped by free{yields}free transitions of thermal Cs-Ar ground state pairs, has been investigated experimentally and computationally. Photoexcitation of Cs vapor/Ar mixtures through the blue satellite of the D{sub 2} transition (peaking at 836.7 nm) selectively populates the {sup 2}P{sub 3/2} upper laser level by the dissociation of the CsAr excited complex. Comparison of laser output energy data, for instantaneous pump powers up to 3 MW, with the predictions of a numerical model sets an upper bound of 8 Multiplication-Sign 10{sup -26} cm{sup 4} W{sup -1} on the Cs (6p {sup 2}P{sub 3/2}) two photon ionization cross-section at 836.7 nm which corresponds to a single photon cross-section of 2.4 Multiplication-Sign 10{sup -19} cm{sup 2} for a peak pump intensity of 3 MW cm{sup -2}.},
doi = {10.1063/1.4796040},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 11,
volume = 102,
place = {United States},
year = {2013},
month = {3}
}