Saturable absorbers for passive Q-switching of erbium lasers emitting in the region of 3 μm

被引：15
作者：
Kisel V.E. [1 ]
Shcherbitskii V.G. [1 ]
Kuleshov N.V. [1 ]
Postnova L.I. [2 ]
Levchenko V.I. [2 ]
机构：
[1] International Laser Center, Belarusian National Technical University, Minsk, 220013
[2] Institute of Solids and Semiconductors, National Academy of Sciences of Belarus, Minsk
来源：
Journal of Applied Spectroscopy | 2005年 / 72卷 / 06期
关键词：
3-μm spectral region; Absorption cross section; Absorption saturation; Passive laser Q switch; Q-switching; Single crystals of Fe:ZnSe; Co:ZnSe; and Co:ZnS;
D O I：
10.1007/s10812-006-0009-0
中图分类号：
学科分类号：
摘要：
The phototropic properties of Fe:ZnSe, Co:ZnSe, and Co:ZnS single crystals have been investigated. It is shown that these crystals can be used to advantage as the saturable absorbers in solid-state erbium lasers emitting in the region of the 3-μm range. The absorption cross sections of the ground states of the Co2+ ion in the ZnSe (σGSA = 11·10 -20 cm2) and ZnS (σGSA = 5.6·10-20 cm2) crystals and of the Fe2+ ion in the ZnSe (σGSA = 50·10-20 cm 2) crystal at λ = 2.79 μm were determined experimentally. It has been established that the above-indicated crystals in the excited state absorb light weakly. The use of these crystals as passive Q switches made it possible to realize, for the first time, the regime of Q-switching of a Cr,Er:YSGG laser emitting at a wavelength of 2.79 μm. Single pulses with an energy of 60 mJ and a duration of 170 nsec were obtained in the regime of passive Q-switching. ©2005 Springer Science+Business Media, Inc.
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收藏
页码：818 / 823
页数：5
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