Publication:
Detection of 3.4 THz radiation from a quantum cascade laser using a microbolometer infrared camera

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Authors
Karunasiri, Gamani
Chamberlain, Danielle
Behnken, Barry N.
Lowe, Michele
Robrish, Peter
Subjects
THz
microbolometer
uncooled
quantum cascade laser
imaging
detection
camera
Advisors
Date of Issue
2007-05
Date
Publisher
SPIE
Language
Abstract
The THz wavelengths cover the frequency range of 0.1-10 THz or 30-3000 μm wavelength band. Currently, detection of THz radiation is carried out using either antenna-coupled semiconductor detectors or superconducting bolometers. Imaging of objects using these detection schemes requires complex scanning mechanisms which limits the applications involving real time imaging. For imaging applications it is desirable to employ focal plane arrays (FPAs) which leads to more compact systems. The FPAs based on photon detectors commonly used in infrared require cooling which becomes stringent as the detection extends to THz wavelengths. On the other hand, microbolometer FPAs using thermal detectors based on temperature change due to infrared absorption have a broad wavelength response and can be operated at room temperature. The advances of microbolometer technology allow real time imaging in the 7-13 μm wavelength range with relatively high sensitivity. However, their ability to detect THz radiation is relatively unknown. In this paper, imaging of a 3.4 THz (88 μm) laser beam using an uncooled microbolometer camera is described.
Type
Article
Description
The article of record as published may be found at https://doi.org/10.1117/12.719744
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Air Force Office of Scientific Research
Funder
Format
8 p.
Citation
Behnken, Barry N., et al. "Detection of 3.4 THz radiation from a quantum cascade laser using a microbolometer infrared camera." Terahertz for Military and Security Applications V. Vol. 6549. International Society for Optics and Photonics, 2007.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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