High Conversion Efficiency and Power Stability of 532 nm Generation from an External Frequency Doubling Cavity
ZHAO Yang1,2**, LIN Bai-Ke1, LI Ye1, ZHANG Hong-Xi3, CAO Jian-Ping1, FANG Zhan-Jun1, LI Tian-Chu1, ZANG Er-Jun1,2
1Division of Time and Frequency Metrology, National Institute of Metrology, Beijing 100013 2Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084 341st Instruments of China Electronics Technology Group Corporation, Qingdao 266555
Abstract：We present a high-efficiency 532 nm green light conversion from an external cavity-enhanced second harmonic generation (SHG) with a periodically poled KTP crystal (PPKTP). The cavity is a bow-tie ring configuration with a unitized structure. When the impedance matching is optimized, the coupling efficiency of the fundamental is as high as 95%. Taking into account both the high power output of the second harmonic and the stability of the system, we obtain over 500 mW green passing through the output cavity mirror, corresponding to a net conversion efficiency higher than 75.2%. Under these operating conditions, the power stability is better than ±0.25% during 5 h. It is the highest conversion efficiency and power stability ever produced in the bow-tie ring cavity with PPKTP for 532 nm generation.
. [J]. 中国物理快报, 2012, 29(9): 94210-094210.
ZHAO Yang, LIN Bai-Ke, LI Ye, ZHANG Hong-Xi, CAO Jian-Ping, FANG Zhan-Jun, LI Tian-Chu, ZANG Er-Jun. High Conversion Efficiency and Power Stability of 532 nm Generation from an External Frequency Doubling Cavity. Chin. Phys. Lett., 2012, 29(9): 94210-094210.
2012, Vol. 29 
