Ryvkin, B.S., Avrutin, Evgeny orcid.org/0000-0001-5488-3222 and Kostamovaara, Juha Tapio (2020) Asymmetric-waveguide, short cavity designs with a bulk active layer for high pulsed power eye-safe spectral range laser diodes. Semiconductor science and technology. pp. 1-11. ISSN 0268-1242
Abstract
It is shown, by calculations calibrated against the authors’ recent experimental data, that an eye-safe wavelength range InGaAsP/InP high pulsed power laser design using a bulk active layer, which has a large refractive index step with respect to the optical confinement layer and is located close to the p-cladding, can provide substantial performance improvement compared to the best results achieved so far for this operating regime and wavelength. The dependence of the laser performance on the design parameters such as the thicknesses of the active layer and the waveguide, as well as the cavity length, are analysed. It is shown that the relatively thick bulk active layer in such InGaAsP/InP lasers allows the use of short cavity lengths (~1 mm or even shorter), for achieving high pulsed power while maintaining a low p-cladding series resistance (making for high efficiency) and a narrow far field (making for high brightness). A single-asymmetry structure with the asymmetric active layer location but symmetric optical confinement layer/cladding refractive index steps gives performance only marginally inferior that of a double-asymmetric one including asymmetric refractive index steps.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Author(s). Published by IOP Publishing Ltd |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Electronic Engineering (York) |
Depositing User: | Pure (York) |
Date Deposited: | 15 May 2020 10:00 |
Last Modified: | 16 Oct 2024 16:36 |
Published Version: | https://doi.org/10.1088/1361-6641/ab8fbe |
Status: | Published online |
Refereed: | Yes |
Identification Number: | 10.1088/1361-6641/ab8fbe |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:160581 |
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