光学学报, 2002, 22 (3): 374, 网络出版: 2006-08-08
液相外延生长Cr,Ca:YAG晶体的光谱特性
Spectra of Cr,Ca:YAG Grown by Liquid Phase Epitaxy
摘要
由液相外延方法在YAG晶体衬底上得到了可饱和吸收的Cr,Ca:YAG晶体外延层,给出了Cr,Ca:YAG晶体外延层在500 nm～1500nm范围内的室温吸收光谱曲线.分析表明,由外延方法获得的Cr,Ca:YAG晶体吸收光谱的主要特征与提拉法晶体基本相同,但发现在750nm左右存在一个弱的吸收峰.这个吸收峰极有可能产生于四面体格位的Cr5+,可以归属到电偶极容许的2B1(2E)→2B2(2T2)跃迁.
Abstract
The saturable absorber Cr,Ca∶YAG based on the undoped YAG was successfully grown by liquid phase epitaxy. The results from the absorption spectra analysis of the Cr,Ca∶YAG show that the main features in visible and near infrared range are the same as these by the Czochralski. Nevertheless, there is a weak absorption band centered around λ≈750 nm, which is first observed in the YAG lattice field. This weak band is interpreted as the arising from tetrahedrally coordinated Cr 5+ , and proposed to assign to the electric dipole allowed 2B 2( 2E)→ 2B 1( 2T 2) transition.
高涛, 成建波, 饶海波, 姜东升, 周寿桓. 液相外延生长Cr,Ca:YAG晶体的光谱特性[J]. 光学学报, 2002, 22(3): 374. 高涛, 成建波, 饶海波, 姜东升, 周寿桓. Spectra of Cr,Ca:YAG Grown by Liquid Phase Epitaxy[J]. Acta Optica Sinica, 2002, 22(3): 374.
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