Systems Analysis for Thermal Infrared 'THz Torch' Applications
File(s)
Published version
Author(s)
Hu, F
Sun, J
Brindley, HE
Liang, X
Lucyszyn, S
Type
Journal Article
Abstract
The ‘THz Torch’ concept was recently introduced by the authors for providing secure wireless communications over short distances within the thermal infrared (10-100 THz). Unlike conventional systems, thermal infrared can exploit front-end thermodynamics with engineered blackbody radiation. For the first time, a detailed power link budget analysis is given for this new form of wireless link. The mathematical modeling of a short end-to-end link is provided, which integrates thermodynamics into conventional signal and noise power analysis. As expected from the Friis formula for noise, it is found that the noise contribution from the pyroelectric detector dominates intrinsic noise. From output signal and noise voltage measurements, experimental values for signal-to-noise ratio (SNR) are obtained and compared with calculated predictions. As with conventional communications systems, it is shown for the first time that the measured SNR and measured bit error rate found with this thermodynamics-based system resembles classical empirical models. Our system analysis can serve as an invaluable tool for the development of thermal infrared systems, accurately characterizing each individual channel and, thus, enables the performance of multi-channel ‘THz Torch’ systems to be optimized.
Date Issued
2015-05
Citation
Journal of Infrared, Millimeter, and Terahertz Waves, 2015, 36 (5), pp.474-495
ISSN
1866-6892
Publisher
Springer US
Start Page
474
End Page
495
Journal / Book Title
Journal of Infrared, Millimeter, and Terahertz Waves
Volume
36
Issue
5
Copyright Statement
© The Author(s) 2015. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution License (CC BY) which
permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are
credited.
permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are
credited.
License URL
Identifier
http://link.springer.com/article/10.1007/s10762-014-0136-2
Publication Status
Published