基于腔相位匹配差频产生太赫兹的研究  

Terahertz generation by Difference Frequency Generation based on cavity phase matching

作　　者：曾诗佳 饶志明[1] 黄俊滔 谢芳森[1] ZENG Shijia;RAO Zhiming;HUANG Juntao;XIE Fangsen(College of Physics and Communication Electronics,Jiangxi Normal University,Nanchang Jiangxi 330022,China)

机构地区：[1]江西师范大学物理与通信电子学院,江西南昌330022

出　　处：《太赫兹科学与电子信息学报》2018年第1期7-12,共6页Journal of Terahertz Science and Electronic Information Technology

基　　金：江西省科技支撑计划资助项目(20151BBE50089);江西省教育厅科技资助项目(GJJ150337);江西师范大学科技资助项目(7170)

摘　　要：研究了基于Ga As晶体的腔相位匹配(CPM)差频产生太赫兹的过程,得出太赫兹波长与最优腔长之间的关系,并结合温度对太赫兹波长的影响,可实现太赫兹波段范围内的连续调谐输出。当泵浦光在微腔中往返20次时,腔相位匹配产生太赫兹的功率转换效率可达1.33%,在效率相同的情况下,CPM腔长为581.41μm时相当于准相位匹配(QPM)条件下的晶体长度约23 mm。可以预见由腔相位匹配原理制备的太赫兹源将具有广阔的应用前景,该结果对相关实验具有一定的参考价值。The process of Terahertz(THz)generation by Difference Frequency Generation(DFG)based on Cavity Phase Matching(CPM)in a GaAs crystal is investigated.The relation between the terahertz wavelength and optimum cavity length is obtained.Combined with the influence of temperature on terahertz wavelength,the continuously tunable THz wave in terahertz frequency can be realized.The power conversion efficiency of terahertz generation based on cavity phase matching can reach to 1.33%under the condition that pump wave travels round trip for 20 times in the microcavity.581.41μm of the cavity length based on CPM amounts to 23 mm of crystal length based on Quasi-Phase Matching(QPM)at the same efficiency.It can be predicted that the terahertz sources prepared by cavity phase matching will have broad application prospect,and the results can provide certain reference for related experiments.

关 键 词：太赫兹源 差频 腔相位匹配 GAAS晶体 

分 类 号：TN24[电子电信—物理电子学]