Low-threshold mid-IR MgO:PPLN optical parametric generation with high reflectivity mirror for signal wavelength

作     者：张兴宝 王月珠 鞠有伦 姚宝权 张云军 

作者机构：Institute of Opto-Electronics Harbin Institute of Technology 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2008年第6卷第3期

页      面：204-206页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：the Scientific Research Foundation of Harbin Institute of Technology 

主　　题：Conversion efficiency Diffraction gratings Mirrors Pumping (laser) Semiconductor lasers Solid state lasers 

摘      要：A low-threshold middle-infrared （mid-IR） MgO：PPLN optical parametric generation （OPG） pumped by a laser diode （LD） end-pumped Z-type Nd：YLF laser at 1047 nm is realized with high reflectivity（HR） mirror for signal. At repetition rate of 10 kHz, the OPG threshold of 50 μJ has been achieved with HR mirror for signal. Compared with the threshold without mirror, the threshold decreases by 17%. Using HR mirror for pump at output side of crystal, the threshold of 40 μJ is achieved. The 2.7 - 4.1 μm continuous tunable output is produced with seven grating periods from 28.5 to 31.5 μm and temperatures from 30 to 200 ℃. When the incident average pump power is 3 W, the OPG idler output power is 0.46 W at 3.26 μm, which corresponds to optical-to-optical conversion efficiency up to 15.3%.