Di Gaetano, E. , Watson, S. , McBrearty, E. , Sorel, M. and Paul, D. J. (2021) Sub-MHz linewidth distributed feedback laser at 780.24-nm emission wavelength for 87Rb applications. Novel In-Plane Semiconductor Lasers XX, 06-12 Mar 2021. ISBN 9781510642454 (doi: 10.1117/12.2582524)
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Abstract
A GaAs/AlGaAs distributed feedback semiconductor (DFB) laser with a laterally-coupled grating is demonstrated at a wavelength of 780.24 nm with an output power up to 60 mW. A mode expander and aluminum-free active layers have been used in the material epilayer to reduce the linewidth to 612 kHz while maintaining high output power. The fabricated laser demonstrates over 40 dB side-mode suppression ratio with tuning range > 0.3 nm, which is suitable for atom cooling experiments with the D2 87Rb atomic transition and provides substantial potential for the laser to be integrated into miniaturized cold atom systems.
| Item Type: | Conference or Workshop Item |
|---|---|
| Keywords: | Narrow linewidth, semiconductor lasers, distributed feedback lasers, aluminum-free active, InGaAsP/GaAs, rubidium clock transition, 780.24 nm wavelength. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Sorel, Professor Marc and Watson, Dr Scott and McBrearty, Dr Euan and Di Gaetano, Dr Eugenio and Paul, Professor Douglas |
| Authors: | Di Gaetano, E., Watson, S., McBrearty, E., Sorel, M., and Paul, D. J. |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Research Group: | Semiconductor Devices |
| Publisher: | SPIE |
| ISSN: | 0277-786X |
| ISBN: | 9781510642454 |
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