InP quantum dot lasers with temperature insensitive operating wavelength

Shutts, Samuel ORCID: https://orcid.org/0000-0001-6751-7790, Smowton, Peter Michael ORCID: https://orcid.org/0000-0002-9105-4842 and Krysa, A. B. 2013. InP quantum dot lasers with temperature insensitive operating wavelength. Applied Physics Letters 103 (6) , 061106. 10.1063/1.4817732

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Abstract

We quantify the mechanisms that govern the lasing wavelength in edge-emitting InP/AlGaInP quantum dot (QD) lasers, by characterising the constituent factors controlling the temperature dependence of the gain peak wavelength. We show that a regime exists where the temperature coefficient of the bandgap can be compensated by the increasing wavelength-shift associated with state-filling in the QD ensemble, necessary to recover the gain peak magnitude. We demonstrate cleaved-facet edge-emitting lasers with a wavelength temperature dependence of 0.03 nm/K, similar to the temperature dependence of a Bragg stack fabricated in this material and approximately a sixth of the dependence of the bandgap.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0003-6951/ (accessed 20/02/2014).
Publisher:	American Institute of Physics
ISSN:	0003-6951
Date of First Compliant Deposit:	30 March 2016
Last Modified:	12 May 2023 17:36
URI:	https://orca.cardiff.ac.uk/id/eprint/53194

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