Study of dual-comb terahertz quantum cascade lasers based on polarization modulation

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

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Supported by the National Natural Science Foundation of China (61927813)

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    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.

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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):825~830

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  • Received:June 13,2022
  • Revised:July 06,2022
  • Adopted:June 24,2022
  • Online: September 22,2022
  • Published: