Hobbs, M. orcid.org/0000-0003-4661-692X and Willmott, J.R. orcid.org/0000-0002-4242-1204 (2019) InGaAs APD thermometry. Measurement Science and Technology, 31 (1). 014005. ISSN 0957-0233
Abstract
The infrared detector is the most important component within any radiation thermometry based system, with its choice determining the wavelength, response time and, ultimately, the temperature measurement capabilities of the instrument. To improve upon the existing generation of radiation thermometers, more sensitive detector technologies are required. In this work, we demonstrate a direct comparison between an indium gallium arsenide (InGaAs) photodiode and an InGaAs avalanche photodiode (APD) for 1.6 μm radiation thermometry. The high internal gain of the InGaAs APD increases the sensitivity of the radiation thermometer, enabling the measurement of a target temperature more than 50 ºC lower than is typical with commercially available InGaAs photodiode thermometers. The more sensitive InGaAs APD provides faster response time measurements, hence improving the thermometer's temporal resolution. Finally, the InGaAs APD is shown to produce a quantitative thermal image with lower measured temperature fluctuation across the scene when incorporated within a highly aperture limited scanning system.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Copyright 2019 IOP Publishing. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (http://creativecommons.org/licenses/by/3.0). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
Keywords: | Radiation thermometry; InGaAs; avalanche photodiode; temperature measurement |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Funding Information: | Funder Grant number Engineering and Physical Science Research Council (EPSRC) EP/M009106/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 13 Sep 2019 11:52 |
Last Modified: | 10 Dec 2021 14:22 |
Status: | Published |
Publisher: | IOP Publishing |
Refereed: | Yes |
Identification Number: | 10.1088/1361-6501/ab41c6 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:150648 |
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