High responsivity mid-infrared indirect detection based on nonlinear crystal BaGa4Se7

被引:4
|
作者
Guo, Liyuan [1 ]
Liu, Pengxiang [2 ]
Qi, Feng [2 ]
Yao, Jiyong [3 ]
Li, Weifan [2 ,4 ]
Zhang, Xingyu [1 ]
Xia, Mingjun [3 ]
机构
[1] Shandong Univ, Ctr Opt Res & Engn, Key Lab Laser & Infrared Syst, Minist Educ, Qingdao 266237, Shandong, Peoples R China
[2] Chinese Acad Sci, Shenyang Inst Automat, Shenyang 110169, Peoples R China
[3] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing Ctr Crystal Res & Dev, Key Lab Funct Crystals & Laser Technol, Beijing 100049, Peoples R China
[4] Key Lab Liaoning Prov Terahertz Imaging & Sensing, Shenyang 110169, Peoples R China
关键词
Mid-infrared detection; Nonlinear optical frequency conversion; Responsivity; BaGa4Se7; crystal; UP-CONVERSION; GENERATION;
D O I
10.1016/j.infrared.2023.104705
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Currently, non-oxide BaGa4Se7 crystal has been demonstrated as a superior nonlinear medium for both coherent mid-infrared (MIR) generation and up-conversion detection. By bridging the desired MIR region to the well-developed near-infrared devices, the latter addresses the drawbacks of traditional direct detection. Based on our recent report, a comprehensive study is conducted on the nonlinear optical up-conversion process to achieve high responsivity. An analytical model is developed and verified through experiment. Their measurement and calculation cover the relationship between the up-converted signal and the two input lights, the acceptable angle of detection crystal, and the responsivities at a wavelength ranging from 3 to 8 mu m. The dependence of responsivity on experimental factors is indicated by the model. The present study provides a theoretical reference for the calibration and optimal design of this detection system, which can also be applied to other general MIR up-conversion configurations.
引用
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页数:5
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