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Title: Rare gas fluoride lasers

Abstract

The rare gas fluoride lasers are discussed in detail. There is a significant interest in these lasers because they are the most efficient visible/uv lasers to date. The dominant formation kinetics of KrF* and XeF* in both discharge and e-beam pumped lasers are presented. Because of the ionic upper level the formation processes are rapid and conditions can be chosen such that the branching ratios into the KrF* and XeF* levels from both the ionic and metastable levels are close to unity. With e-beam pumping of these lasers, a guide magnetic field enables the deposition of >90% of the beam energy into the optical volume. Discharge pumping has the potential of being more efficient than e-beam pumping; however, the key technical issues of discharge stability and metastable production efficiency have to be addressed. Stabilization of the discharge is possible if an external source of ionization is used. The quenching of the rare gas fluorides by two- or three-body processes has been carefully measured and analyzed. The three-body quenching of KrF* leads to the eventual formation of the excited triatomic Kr/sub 2/F* which radiates in a broad band centered at 410 nm. It has also been determined that ionic and excitedmore » state absorption in the active media is large enough to impact the extraction efficiency of these lasers. In the case of KrF*, the dominant absorbing species are F/sub 2/,F/sup -/, and Kr/sub 2/F*, while Xe/sub 2//sup +/ appears to be the dominant absorber in XeF*. Finally, we have also investigated exprimentally and theoretically the effects of the vibrational relaxation in the upper level and finite lifetime of the lower level on XeF* laser performance.« less

Authors:
 [1]; ; ;
  1. Avco Everett Research Lab., Inc., MA
Publication Date:
OSTI Identifier:
6443983
Resource Type:
Journal Article
Journal Name:
IEEE J. Quant. Electron.; (United States)
Additional Journal Information:
Journal Volume: QE-14:7
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; GAS LASERS; PERFORMANCE; ARGON FLUORIDES; KRYPTON FLUORIDES; OPERATION; XENON FLUORIDES; ARGON COMPOUNDS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; KRYPTON COMPOUNDS; LASERS; RARE GAS COMPOUNDS; XENON COMPOUNDS; 420300* - Engineering- Lasers- (-1989)

Citation Formats

Rokni, M, Mangano, J A, Jacob, J H, and Hsia, J C. Rare gas fluoride lasers. United States: N. p., 1978. Web. doi:10.1109/JQE.1978.1069837.
Rokni, M, Mangano, J A, Jacob, J H, & Hsia, J C. Rare gas fluoride lasers. United States. doi:10.1109/JQE.1978.1069837.
Rokni, M, Mangano, J A, Jacob, J H, and Hsia, J C. Sat . "Rare gas fluoride lasers". United States. doi:10.1109/JQE.1978.1069837.
@article{osti_6443983,
title = {Rare gas fluoride lasers},
author = {Rokni, M and Mangano, J A and Jacob, J H and Hsia, J C},
abstractNote = {The rare gas fluoride lasers are discussed in detail. There is a significant interest in these lasers because they are the most efficient visible/uv lasers to date. The dominant formation kinetics of KrF* and XeF* in both discharge and e-beam pumped lasers are presented. Because of the ionic upper level the formation processes are rapid and conditions can be chosen such that the branching ratios into the KrF* and XeF* levels from both the ionic and metastable levels are close to unity. With e-beam pumping of these lasers, a guide magnetic field enables the deposition of >90% of the beam energy into the optical volume. Discharge pumping has the potential of being more efficient than e-beam pumping; however, the key technical issues of discharge stability and metastable production efficiency have to be addressed. Stabilization of the discharge is possible if an external source of ionization is used. The quenching of the rare gas fluorides by two- or three-body processes has been carefully measured and analyzed. The three-body quenching of KrF* leads to the eventual formation of the excited triatomic Kr/sub 2/F* which radiates in a broad band centered at 410 nm. It has also been determined that ionic and excited state absorption in the active media is large enough to impact the extraction efficiency of these lasers. In the case of KrF*, the dominant absorbing species are F/sub 2/,F/sup -/, and Kr/sub 2/F*, while Xe/sub 2//sup +/ appears to be the dominant absorber in XeF*. Finally, we have also investigated exprimentally and theoretically the effects of the vibrational relaxation in the upper level and finite lifetime of the lower level on XeF* laser performance.},
doi = {10.1109/JQE.1978.1069837},
journal = {IEEE J. Quant. Electron.; (United States)},
number = ,
volume = QE-14:7,
place = {United States},
year = {1978},
month = {7}
}