An Efficient Photon Conversion Efficiency Ammonia Terahertz Cavity Laser

作     者：祁春超 左都罗 卢彦兆 唐建 杨晨光 柯林达 程祖海 

作者机构：Wuhan National Laboratory for Optoelectronics Wuhan 430074 College of Optoelectronic Science and Engineering Huazhong University of Science and Technology Wuhan 430074 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2009年第26卷第12期

页      面：106-109页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：国家973计划 Creative Foundation of Wuhan National Laboratory for Optoelectronics 

主　　题：Optics quantum optics and lasers 

摘      要：An efficient ammonia terahertz （THz） cavity laser is reported experimentally. Unlike the past design schemes such as hole couplers and freestanding mesh couplers, in our systems the input and output couplers are fabricated by depositing nickel capacitive metallic meshes on ZnSe and high-resistivity silicon substrates. Thus the couplers not only can be constructed as an F-P oscillator but also can be used as sealed windows that are easier to perform the adjustment of alignment with. To enhanceTHz laser output energy and photon conversion efficiency, the dominant factors such as pump intensity and gas pressure are investigated experimentally. Finally, a 1.35mJ terahertz radiation of ammonia laser with 90μm wavelength （3.33THz） operating at 1.09kPa pumped by a 402mJ TEA CO2 laser with 9R （16） line is generated, and photon conversion efficiencies of 6.5% are achieved.