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Proceedings Paper

Terahertz quantum well devices and their potential for free space communication
Author(s): P. D. Grant; S. R. Laframboise; R. Dudek; M. Graf; A. Bezinger; H. C. Liu
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Paper Abstract

We report on our development of both detectors and lasers in the terahertz (THz) region. For detection, we focus on the approach based on the extension of the celebrated quantum well infrared photodetectors (QWIPs); whereas the quantum cascade lasers (QCLs) provide the source. We show our preliminary demonstration of free space communication using our detectors and lasers. An all photonic THz communication link operating at 3.8 THz using a QCL 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 two meters of room air. Carrier strength at the photodetector was 100 times above the noise level measured. THz free space communication may be of interest in satellite based systems.

Paper Details

Date Published: 27 August 2009
PDF: 4 pages
Proc. SPIE 7467, Nanophotonics and Macrophotonics for Space Environments III, 74670P (27 August 2009); doi: 10.1117/12.824541
Show Author Affiliations
P. D. Grant, National Research Council Canada (Canada)
S. R. Laframboise, National Research Council Canada (Canada)
R. Dudek, National Research Council Canada (Canada)
M. Graf, National Research Council Canada (Canada)
A. Bezinger, National Research Council Canada (Canada)
H. C. Liu, National Research Council Canada (Canada)


Published in SPIE Proceedings Vol. 7467:
Nanophotonics and Macrophotonics for Space Environments III
Edward W. Taylor; David A. Cardimona, Editor(s)

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