Terahertz sensing and imaging using a quantum cascade laser

Dean, Paul, Valavanis, Alex, Khanna, Suraj P., Lachab, Mohammad, Indjin, Dragan, Ikonic, Zoran, Harrison, Paul, Linfield, Edmund H., Davies, A. Giles, Lim, Yah Leng, Kliese, Russell, Nikolic, Milan, Wilson, Stephen J. and Rakic, Aleksandar D. (2011). Terahertz sensing and imaging using a quantum cascade laser. In: 2011 IEEE Sensors. 10th IEEE Conference on Sensors, Limerick, Ireland, (51-54). 28-31 October 2011. doi:10.1109/ICSENS.2011.6127149

Author Dean, Paul
Valavanis, Alex
Khanna, Suraj P.
Lachab, Mohammad
Indjin, Dragan
Ikonic, Zoran
Harrison, Paul
Linfield, Edmund H.
Davies, A. Giles
Lim, Yah Leng
Kliese, Russell
Nikolic, Milan
Wilson, Stephen J.
Rakic, Aleksandar D.
Title of paper Terahertz sensing and imaging using a quantum cascade laser
Conference name 10th IEEE Conference on Sensors
Conference location Limerick, Ireland
Conference dates 28-31 October 2011
Proceedings title 2011 IEEE Sensors   Check publisher's open access policy
Journal name Proceedings of IEEE Sensors   Check publisher's open access policy
Place of Publication Piscataway, NJ, United States
Publisher Institute of Electrical and Electronics Engineers
Publication Year 2011
Sub-type Fully published paper
DOI 10.1109/ICSENS.2011.6127149
ISBN 9781424492893
ISSN 1930-0395
Start page 51
End page 54
Total pages 4
Language eng
Abstract/Summary We demonstrate terahertz (THz) frequency imaging and sensing using a single quantum cascade laser (QCL) device for both generation and sensing of THz radiation. Detection is achieved by utilising the effect of self-mixing in the THz QCL, and specifically by monitoring perturbations to the voltage across the QCL induced by light reflected from an external object back into the laser cavity. Self-mixing offers high sensitivity, a potentially fast response, and a simple, compact optical design. We show that it can be used to obtain high-resolution reflection images of exemplar structures, as well as for the measurement of the displacement of a remote target, both with and without opaque (in the visible spectrum) materials in the beam path. We also demonstrate displacement sensing over a stand-off distance of 7m through air.
Keyword Monolithic vcsel array
Parallel readout
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Mechanical & Mining Engineering Publications
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