Saat, NK, Dean, P, Khanna, SP et al. (3 more authors) (2015) Switching circuit to improve the frequency modulation difference-intensity THz quantum cascade laser imaging. In: AIP Conference Proceedings. NATIONAL PHYSICS CONFERENCE 2014 (PERFIK 2014), 18-19 Nov 2014, Kuala Lumpur, Malaysia. American Institute of Physics ISBN 978-0-7354-1299-6
Abstract
We demonstrate new switching circuit for difference-intensity THz quantum cascade laser (QCL) imaging by amplitude modulation and lock in detection. The switching circuit is designed to improve the frequency modulation so that it can stably lock the amplitude modulation of the QCL and the detector output. The combination of a voltage divider and a buffer in switching circuit to quickly switch the amplitude of the QCL biases of 15.8 V and 17.2 V is successfully to increase the frequency modulation up to ∼100 Hz.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 AIP Publishing LLC. This is an author produced version of a paper published in AIP Conference Proceedings. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | difference-intensity THz QCL imaging, switching circuit, frequency modulation, voltage divider, buffer |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 26 Oct 2015 12:03 |
Last Modified: | 17 Jan 2018 19:10 |
Published Version: | http://dx.doi.org//10.1063/1.4915165 |
Status: | Published |
Publisher: | American Institute of Physics |
Identification Number: | 10.1063/1.4915165 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:87942 |