量子电子学报2013，Vol.30Issue(4)：411-417,7.DOI:10.3969/j.issn.1007-5461.2013.04.005
连续激光泵浦重水气体分子产生THz激光辐射的阈值分析
Analysis of pump threshold for producing terahertz laser radiation in continuous laser pumping heavy water gas molecules
摘要
Abstract
Pumping heavy water gas (D2O) molecules using continuous operation carbon dioxide laser 9R(22)output line,continuous terahertz laser radiation output with 385 μm wavelength and 0.78 THz frequency can be produced.The laser process can be effectively analyzed with the semi-classical theory analysis method combining three level system model,and the solving process was simplified through reasonable approximation.The analytical expressions of terahertz laser signal gain coefficient Gs and pump light signal absorption coefficient Gp were obtained,and the pump threshold for producing terahertz laser oscillation was calculated to be 6.24 × 10-3 W/mm2.Normally,when the pump laser output spot area is 0.25 mm2,the output power of its 9R(22) spectral line needs to be above 1.6 mW for stimulating terahertz laser radiation.关键词
激光物理/泵浦阈值/半经典理论/重水气体分子/太赫兹技术Key words
laser physics/ pump threshold/ semi-classical theory/ D2O gas molecule/ terahertz technology分类
信息技术与安全科学引用本文复制引用
何志红,陈长水,刘颂豪,张会云,张玉萍,罗锡璋..连续激光泵浦重水气体分子产生THz激光辐射的阈值分析[J].量子电子学报,2013,30(4):411-417,7.基金项目
国家自然科学基金(61001018)、广东省自然科学基金(9452840301003552)、广东省科技计划(00760211330304099)、中山市科技计划(20092A205)、电子薄膜与集成器件国家重点实验室中山分实验室开放基金(412S0611)资助. （61001018）
