红外与毫米波学报2017，Vol.36Issue(1)：60-64,106,6.DOI:10.11972/j.issn.1001-9014.2017.01.012
太赫兹二级分布反馈量子级联激光器中的模式竞争与功率特性
Mode competition and power characteristics in terahertz second-order distributed feedback quantum cascade lasers
摘要
Abstract
We investigated experimentally and theoretically the mode competition and output power characteristics in terahertz second-order distributed feedback quantum cascade lasers.The experiment results demonstrated that the lasers operate stably on the fundamental transverse/longitudinal mode during the whole laser dynamic range.High-order transverse modes are suppressed due to the absorbing boundaries set along the laser ridge.In addition,the fundamental mode and the high-order longitudinal modes are very close in frequency,and their electromagnetic fields have strong overlap.The spectral or spatial hole burning effect is therefore effectively avoided,leading to a stable operation of the fundamental longitudinal mode.The experimental results also show that the slope efficiency of output power decreases with the length of the distributed feedback grating.As a result,only in certain grating length,the output power reaches its maximum.Our work provides experimental and theoretical supports for the studies of high performance THz lasers and the phase locked laser arrays.关键词
太赫兹/量子级联激光器/单模/模式竞争Key words
Terahertz/quantum cascade lasers/single mode/mode competition分类
信息技术与安全科学引用本文复制引用
颜全,王芳芳,朱欢,俞辰韧,徐刚毅,陈建新,何力..太赫兹二级分布反馈量子级联激光器中的模式竞争与功率特性[J].红外与毫米波学报,2017,36(1):60-64,106,6.基金项目
国家自然科学基金(61574149),中科院“百人计划”项目,上海市“浦江人才”计划(14PJ1409700)Supported by National Natural Science Foundation of China (61574149),"The Hundred Talents Program" of CAS and the "Shanghai Pujiang program" (14PJ1409700) （61574149）
