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Real-time transmission-type terahertz microscope with palm size terahertz camera and compact quantum cascade laser

Authors :
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Hu, Qing
Lee, Alan
Oda, Naoki
Ishi, Tsutomu
Morimoto, Takao
Sudou, Takayuki
Tabata, Hitoshi
Kawabe, Shunsuke
Fukuda, Kyohei
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Hu, Qing
Lee, Alan
Oda, Naoki
Ishi, Tsutomu
Morimoto, Takao
Sudou, Takayuki
Tabata, Hitoshi
Kawabe, Shunsuke
Fukuda, Kyohei
Source :
SPIE
Publication Year :
2014

Abstract

This paper describes a real-time transmission-type Terahertz (THz) microscope, with palm-size THz camera and compact quantum cascade laser (QCL). The THz camera contains 320x240 microbolometer focal plane array which operates at 30 Hz frame rate and has lock-in imaging function as well as integration functions such as frame integration and spatial filter. These functions are found very powerful in improving signal-to-noise ratio. QCL is installed in compact Stirling cycle cooler. A variety of QCLs covers frequency range from 1.5 to 5 THz and provides time-average power of 0.5~2 mW. The illumination area for sample is changed by adjusting one lens in the illumination optics. Performances of the THz microscope, such as signal-to-noise ratio and so on, were measured and are found consistent with the calculations. THz images taken with the THz microscope are finally presented.<br />National Institute of Information and Communications Technology (Japan)

Details

Database :
OAIster
Journal :
SPIE
Notes :
application/pdf, en_US
Publication Type :
Electronic Resource
Accession number :
edsoai.on1342472833
Document Type :
Electronic Resource