1.Key Laboratory of Terahertz Solid State Technology， Shanghai Institute of Microsystem and Information Technology， Shanghai 200050， China;2.Center of Materials Science and Optoelectronics Engineering， University of Chinese Academy of Sciences， Beijing 100083， China
Supported by the National Natural Science Foundation of China （61927813）
Dual-comb realized by terahertz quantum cascade lasers （THz QCL） has important applications in spectral detection， distance measurement and imaging. The dual-comb signal is heavily dependent on the THz coupling optical power. The THz QCL light is linearly polarized， and a linear polarizer is inserted into the optical path of the dual-comb. The polarizer is rotated to achieve the effect of adjusting the THz light intensity. The dependence of the THz QCL dual-comb spectrum and power on the polarization angle is systematically investigated and it lays the foundation for the realization of a highly stable THz dual-comb light source and application.
YANG Si-Jia, LI Zi-Ping, LIAO Xiao-Yu, WANG Chen-Jie, LI Hua, CAO Jun-Cheng. Study of dual-comb terahertz quantum cascade lasers based on polarization modulation[J]. Journal of Infrared and Millimeter Waves,2022,41(5):825~830Copy