Revin, D. and Matcher, S. (2022) Fast-sweeping continuous wave quantum cascade laser operating in an external cavity with polygon mirror. Optics Express, 30 (12). pp. 21843-21853. ISSN 1094-4087
Abstract
We report a continuous wave room temperature quantum cascade laser operating in an external cavity in the Littrow configuration with a 10-facet polygon mirror rotating at 24,000 RPM. The quantum cascade laser emission is swept across ∼1520 - 1625 cm−1 wavenumber range in less than ∼45 µs with a sweep repetition rate of 4 kHz. The measured maximum output power at the laser gain maximum, 15°C and 0.86 A driving current is ∼90 mW; the estimated average output power across the 45 µs wavenumber sweep is ∼50 mW. Through its sweep, the laser emits on the sequential Fabry-Perot longitudinal modes of the laser chip cavity with the mode separation of ∼0.5 cm−1. The linewidth of the emitting modes is less than ∼0.05 cm−1. Spectral measurements of the infrared absorption features of a 10 µm thick layer of acetophenone and water vapor in the air have demonstrated the capability of obtaining spectral data in less than 45 µs.
Metadata
Authors/Creators: |
|
||||
---|---|---|---|---|---|
Copyright, Publisher and Additional Information: | © 2022. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. (http://creativecommons.org/licenses/by/4.0/) Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. | ||||
Dates: |
|
||||
Institution: | The University of Sheffield | ||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) | ||||
Funding Information: |
|
||||
Depositing User: | Symplectic Sheffield | ||||
Date Deposited: | 11 Jul 2022 13:00 | ||||
Last Modified: | 11 Jul 2022 13:00 | ||||
Status: | Published | ||||
Publisher: | Optical Society of America (OSA) | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1364/oe.453045 | ||||
Related URLs: |