Han, YJ orcid.org/0000-0003-2141-3077, Partington, J, Chhantyal Pun, R et al. (13 more authors) (2018) Gas spectroscopy through multimode self-mixing in a double-metal terahertz quantum cascade laser. Optics Letters, 43 (24). pp. 5933-5936. ISSN 0146-9592
Abstract
A multimode self-mixing terahertz-frequency gas absorption spectroscopy is demonstrated based on a quantum cascade laser. A double-metal device configuration is used to expand the laser’s frequency tuning range and a precision-micromachined external waveguide module is used to enhance the optical feedback. Methanol spectra are measured using two laser modes at 3.362 THz and 3.428 THz simultaneously, with more than 8 absorption peaks resolved over a 17 GHz bandwidth, which provide the noise-equivalent absorption sensitivity of 1.20‾³ cm‾¹Hz‾¹/² and 2.08‾³ cm‾¹Hz‾¹/² , respectively. In contrast to all previous self-mixing spectroscopy, our multimode technique expands the sensing bandwidth and duty cycle significantly.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Journal © 2018 Optical Society of America. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. (https://creativecommons.org/licenses/by/4.0/) |
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) |
Funding Information: | Funder Grant number Centre for Earth Observation Instrumentation Not Known |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Nov 2018 14:55 |
Last Modified: | 25 Jun 2023 21:35 |
Status: | Published |
Publisher: | Optical Society of America |
Identification Number: | 10.1364/OL.43.005933 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:138293 |