Low-power-pumped high-efficiency frequency doubling at 397.5 nm in a ring cavity  

作　　者：李岩 周志远 丁冬生 史保森 

机构地区：[1]Key Laboratory of Quantum Information, University of Science and Technology of China [2]Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China

出　　处：《Chinese Optics Letters》2014年第11期86-89,共4页中国光学快报（英文版）

基　　金：supported by the National Fundamental Research Program of China(No.2011CBA00200);the National Natural Science Foundation of China(Nos.11174271,61275115,and 10874171);the Innovation Fund of the Chinese Academy of Sciences

摘　　要：We report low pump power high-efficiency frequency doubling of a fundamental laser beam at 795 nm, corresponding to the rubidium D1 line, to generate UV light at 397.5 nm using a periodically poled KTi OPO4（PPKTP） crystal in a ring cavity. We obtain maximum stable output power of 49 m W for mode-matching pump power of 110 m W, corresponding to 45% raw efficiency（56% net efficiency when considering the output coupling mirror’s 80% transmission）. This is the highest efficiency obtained at this wavelength in PPKTP with such low pump power. We obtain 80% beam coupling efficiency to single-mode fiber, demonstrating high beam quality.We report low pump power high-efficiency frequency doubling of a fundamental laser beam at 795 nm, corresponding to the rubidium D1 line, to generate UV light at 397.5 nm using a periodically poled KTi OPO4（PPKTP） crystal in a ring cavity. We obtain maximum stable output power of 49 m W for mode-matching pump power of 110 m W, corresponding to 45% raw efficiency（56% net efficiency when considering the output coupling mirror’s 80% transmission）. This is the highest efficiency obtained at this wavelength in PPKTP with such low pump power. We obtain 80% beam coupling efficiency to single-mode fiber, demonstrating high beam quality.

关 键 词：Frequency doublers Laser beams Pumping (laser) Single mode fibers 

分 类 号：TN248[电子电信—物理电子学]