DISPERSION EFFECTS IN 4-WAVE-MIXING MEASUREMENTS OF IONS IN SOLIDS

被引:25
作者
POWELL, RC
PAYNE, SA
机构
[1] Lawrence Livermore National Laboratory, University of California, Livermore, CA, 94550
[2] Department of Physics, Oklahoma State University, Stillwater, OK
关键词
D O I
10.1364/OL.15.001233
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We have performed nondegenerate four-wave mixing measurements on Cr3+ ions in three crystals: BeAl2O4, Gd3Sc2Ga3O12, and LaMgAl11O19. Two laser beams of the same frequency were used to resonantly pump one of the absorption bands of Cr3+, and probe beams with three different wavelengths ranging from 442 to 1064 nm were used to generate a signal from the laser-induced population grating. The observed four-wave mixing signal strength was found to increase as the wavelength of the probe beam was decreased. A model was utilized to explain these results based on the change in polarizability of the Cr3+ ions when they are in the metastable state versus the ground state, and it was found that the dispersion effects can be described by a single-oscillator model with the lowest-energy charge-transfer transition of Cr3+ making the dominant contribution to the signal. © 1990 Optical Society of America.
引用
收藏
页码:1233 / 1235
页数:3
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