High-Quality Continuous-Wave Imaging with a 2.53THz Optical Pumped Terahertz Laser and a Pyroelectric Detector
BING Pi-Bin1,2**, YAO Jian-Quan1,2, XU De-Gang1,2, XU Xiao-Yan1,2, LI Zhong-Yang1,2
1The Institute of Laser and Optoelectronics, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072 2Key Laboratory of Optoelectronics Information and Technical Science (Ministry of Education), Tianjin University, Tianjin 300072
High-Quality Continuous-Wave Imaging with a 2.53THz Optical Pumped Terahertz Laser and a Pyroelectric Detector
BING Pi-Bin1,2**, YAO Jian-Quan1,2, XU De-Gang1,2, XU Xiao-Yan1,2, LI Zhong-Yang1,2
1The Institute of Laser and Optoelectronics, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072 2Key Laboratory of Optoelectronics Information and Technical Science (Ministry of Education), Tianjin University, Tianjin 300072
摘要A cw terahertz (THz) transmission imaging system is demonstrated and a high-quality THz image can be obtained using a pyroelectric detector. The factors that affect the imaging quality, such as the THz wavelength, spot size on the sample surface, step length of the motor, and frequency of the chopper, are theoretically and experimentally investigated. The experimental results show that the maximum resolution of the THz image can reach 0.4 mm with the THz wavelength of 118.8 μm, the spot size of 1.8 mm and the step length of 0.25 mm.
Abstract：A cw terahertz (THz) transmission imaging system is demonstrated and a high-quality THz image can be obtained using a pyroelectric detector. The factors that affect the imaging quality, such as the THz wavelength, spot size on the sample surface, step length of the motor, and frequency of the chopper, are theoretically and experimentally investigated. The experimental results show that the maximum resolution of the THz image can reach 0.4 mm with the THz wavelength of 118.8 μm, the spot size of 1.8 mm and the step length of 0.25 mm.
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2010, Vol. 27 
