Polarization influence of excited state absorption on the performance of Cr4+:YAG laser

被引：8
作者：
Kartazaev, V
Alfano, RR
机构：
[1] CUNY City Coll, Dept Phys, Inst Ultrafast Spect & Lasers, New York, NY 10031 USA
[2] CUNY City Coll, New York State Ctr Adv Technol Ultrafast Photon M, New York, NY 10031 USA
[3] CUNY, Grad Sch, New York, NY 10031 USA
来源：
OPTICS COMMUNICATIONS | 2004年 / 242卷 / 4-6期
基金：
美国国家航空航天局;
关键词：
laser; solid-state; excited state absorption;
D O I：
10.1016/j.optcom.2004.09.007
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The polarization dependence of the excited-state absorption (ESA) on the gain of the Cr4+:YAG medium is described. Using laser efficiency data, the emission and ESA cross-section for sigma- and pi-polarization at 1450 nm are determined. Due to excitation of the two types of Cr4+ oriented centers in Cr4+:YAG for unpolarized pumping, the effective ESA cross-section sigma(ESAu) = sigma(1pi) + sigma(1sigma) = 1.6 x 10(-19) cm(2) is obtained. The effective ESA cross-section for linearly polarized pumping, with direction of the electric vector along the S-4 local symmetry axis, is sigma(ESAp) = sigma(1pi) = 0.8 x 10(-19) cm(2). (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：605 / 611
页数：7
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