Continuous-wave operation of laterally-coupled distributed feedback and ridge waveguide Fabry-Pérot laser diodes on MOCVD-grown InAs/InP quantum dot material

Salmond, Ben, Simpson, Tom, Cao, Zhongming, Hentschel, Curtis, Forrest, Richard, Liu, Shangfeng, Li, Qiang ORCID: https://orcid.org/0000-0002-5257-7704, Smowton, Peter M. ORCID: https://orcid.org/0000-0002-9105-4842 and Shutts, Samuel 2026. Continuous-wave operation of laterally-coupled distributed feedback and ridge waveguide Fabry-Pérot laser diodes on MOCVD-grown InAs/InP quantum dot material. Optics Express 34 (12) , pp. 22330-22337. 10.1364/OE.597025

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Abstract

We present continuous wave (CW) operation of narrow ridge waveguide (RWG) Fabry-Pérot (FP) and 3rd-order laterally coupled distributed feedback (LC-DFB) lasers on metal-organic chemical vapor deposition (MOCVD) grown InAs/InP quantum dot (QD) material targeting the C and L-band. The devices, which had a ridge width of 1.5 µm and a cavity length of 500 µm, exhibited threshold currents of 39 mA and 44 mA at 20 °C, respectively, and CW lasing was achieved up to 50 °C. The LC-DFB laser demonstrated single mode lasing across the entire measured current and temperature ranges with side-mode suppression ratios reaching 46 dB.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Publisher:	Optica Publishing Group
ISSN:	1094-4087
Funders:	EPSRC, UKRI Innovate UK
Projects:	EP/Z532848/1, EP/V029681/1, EP/S024441/1, 107134
Date of First Compliant Deposit:	8 July 2026
Date of Acceptance:	10 April 2026
Last Modified:	18 Aug 2026 12:49
URI:	https://orca.cardiff.ac.uk/id/eprint/188078

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