All-solid-state high-efficiency high-power Nd:YVO4/KTP laser of single-frequency operation

作者：Zheng Yao Hui^*; Lu Hua Dong; Li Feng Qin; Zhang Kuan Shou; Peng Kun Chi

来源：Chinese Journal of Lasers, 2007, 34(6): 739-742.

• Elliptical Gaussian beam
• High efficiency single frequency laser
• Intracavity frequency doubling
• Laser diode (LD)
• Laser technique

An all-solid-state single frequency Nd:YVO4/KTP laser with high efficiency and high power is reported, with fiber-coupled laser diode (LD) end-pumping Nd:YVO4 crystal, ring resonator consisting of four mirrors, and KTP crystal intracavity frequency doubling. Based on the frequency-doubling theory of elliptical Gaussian beam under conditions of critical phase matching, an improved intracavity frequency-doubling conversion efficiency is obtained by tuning the orientation of Nd:YVO4 crystal and choosing appropriate polarizing direction for fundamental frequency light to make the walk-off plane of KTP crystal parallel to the sagittal plane of cavity. The peak output power of single frequency green laser reaches to 4.8 W and the optical-optical conversion efficiency equals to 25.5%, when the pumping power is 20 W. In comparison, when the walk-off plane is perpendicular to the sagittal plane, the conversion efficiency is 21.8%, and the maximal single frequency green laser output power is 4.1 W.

• 出版日期2007
• 单位山西大学