Fe:ZnSe passive Q-switching of 2.8-μm Er:Cr:YSGG laser cavity

被引:16
作者
Gallian, Andrew [1 ]
Martinez, Alan [1 ]
Marine, Patrick [1 ]
Fedorov, Vladimir [1 ]
Mirov, Sergey [1 ]
Badikov, Valeri [2 ]
Boutoussov, Dmitri [3 ]
Andriasyan, Manvel [3 ]
机构
[1] Univ Alabama Birmingham, Ctr Opt Sensors & Spect, Dept Phys, 310 Campbell Hall,1300 Univ Blvd, Birmingham, AL 35294 USA
[2] Kuban State Univ, Krasnodar 350040, Russia
[3] BIOLASE Technol Inc, Irvine, CA 92618 USA
来源
SOLID STATE LASERS XVI: TECHNOLOGY AND DEVICES | 2007年 / 6451卷
关键词
Saturable Absorber; Passive Q-Switching of Cr : Er : YSGG; Fe : ZnSe crystals;
D O I
10.1117/12.701289
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The use of Fe:ZnSe polycrystals as passive Q-switches for the Er:Cr:YSGG laser operating at 2.8 mu m is introduced. Fe:ZnSe samples with 1-7cm(-1) coefficients of absorption were prepared using thermal diffusion of iron in CVD grown polycrystalline ZnSe. A flashlamp pumped Er:Cr:YSGG laser with a variable (40 - 80% reflectivity) output coupler (OC) was used as a test bed for passive Q-switching. Using a 90% initial transmission Fe:ZnSe placed at the Brewster angle we obtained a single giant pulse lasing with a pulse duration of similar to 65 ns and a maximum output of 13 mJ under 30 J of flashlamp pump. Multi-pulse (19 pulses) output was obtained with 85 mJ total output energy at a pump energy of 30 J. The saturation curve of Fe:ZnSe was measured. Fitting this data with a theoretical model results in absorption cross-section of 0.56 X 10(-18) cm, which is close to the value of the absorption cross-section obtained from spectroscopic measurements (0.85 x 10(-18) cm at 2.8 mu m).
引用
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页数:9
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