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Real-time imaging using a 4.3-THz quantum cascade laser and a 320 /spl times/ 240 microbolometer focal-plane array

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5 Author(s)
A. W. M. Lee ; Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA ; B. S. Williams ; S. Kumar ; Qing Hu
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We report the use of a ~50-mW peak power 4.3-THz quantum cascade laser (QCL) as an illumination source for real-time imaging with a 320 times 240 element room-temperature microbolometer focal-plane array detector. The QCL is modulated synchronously with the focal-plane array for differential imaging. Signal-to-noise ratios of ~340 are achieved at a 20-frame/s acquisition rate, and the optical noise equivalent power of the detector array at 4.3 THz is estimated to be ~320 pW/radicHz. Both reflection and transmission mode imaging are demonstrated

Published in:

IEEE Photonics Technology Letters  (Volume:18 ,  Issue: 13 )