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

被引：15

作者：

Hewitt, J. D. ^{[1
]}

Houlahan, T. J., Jr. ^{[1
]}

Gallagher, J. E. ^{[2
]}

Carroll, D. L. ^{[3
]}

Palla, A. D. ^{[3
]}

Verdeyen, J. T. ^{[3
]}

Perram, G. P. ^{[2
]}

Eden, J. G. ^{[1
]}

机构：

[1] Univ Illinois, Dept Elect & Comp Engn, Lab Opt Phys & Engn, Urbana, IL 61801 USA

[2] USAF, Dept Engn Phys, Inst Technol, Wright Patterson AFB, OH 45433 USA

[3] CU Aerosp, Champaign, IL 61802 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 11期

关键词：

ALKALI LASERS; IONIZATION;

D O I：

10.1063/1.4796040

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photoionization of Cs (6p P-2(3/2)) atoms during the operation of a Cs D-2 line (852.1 nm: 6p P-2(3/2) -> 6s S-2(1/2)) laser, pumped by free -> 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-2 transition (peaking at 836.7 nm) selectively populates the P-2(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 3MW, with the predictions of a numerical model sets an upper bound of 8 x 10(-26) cm(4) W-1 on the Cs (6p P-2(3/2)) two photon ionization cross-section at 836.7 nm which corresponds to a single photon cross-section of 2.4 x 10(-19) cm(2) for a peak pump intensity of 3MW cm(-2). (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4796040]

引用

页数：4

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