Effect of Strontium Ion on the Growth and Second-Harmonic Generation Properties of GdCa<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> Crystal
Zhang Shu-Jun; Cheng Zhen-Xiang; Liu Jun-Hai; Han Jian-Ru; Wang Ji-Yang; Shao Zong-Shu; Chen Huan-Chu; Zhang Shu-Jun; State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100; Cheng Zhen-Xiang; State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100; Liu Jun-Hai; State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100; Han Jian-Ru; State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100; Wang Ji-Yang; State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100; Shao Zong-Shu; State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100; Chen Huan-Chu; State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100
Журнал:
Chinese Physics Letters
Дата:
2001-01-01
Аннотация:
Large sized and optical quality GdCa<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> (GdCOB) crystal with calcium partially substituted by strontium (Sr) ions was grown for the first time. The x-ray powder diffraction shows that the Sr ion has an effect on the cell parameters of the GdCOB crystal. Second-harmonic generation (SHG) experiments were performed on the Sr:GdCOB and GdCOB crystals along the spatial phase-matching direction. The results show that the cw green laser output power is 1.04 W when the laser diode pump power is 10 W in the Nd:YVO<sub>4</sub>/Sr:GdCOB intracavity laser. Considering the slope efficiency of Nd:YVO<sub>4</sub> and the fundamental laser in cavity, the intracavity SHG conversion efficiency of the GdCOB crystal is 21% while it is 24% for the Sr:GdCOB crystal, the SHG conversion efficiency is improved by 14%. The effect of the Sr ions on the nonlinearity of the GdCOB crystal is also discussed by using the anion group theory. PACS: 42. 65. Ky, 78. 20. -e, 78. 55. Hx
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