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Terahertz free space communications demonstration with quantum cascade laser and quantum well photodetector

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6 Author(s)
Grant, P.D. ; Inst. for Microstruct. Sci., Nat. Res. Council of Canada, Ottawa, ON, Canada ; Laframboise, S.R. ; Dudek, R. ; Graf, M.
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An all photonic terahertz communication link operating at 3.8 THz using a quantum cascade laser and quantum well photodetector has been demonstrated. The link consists of a quantum cascade laser transmitter and a quantum well photodetector receiver. The link was used to transmit audio through 2 m of room air. Carrier strength at the photodetector was 100 times greater than the noise level measured.

Published in:

Electronics Letters  (Volume:45 ,  Issue: 18 )