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Proceedings Paper

Quantum dot superluminescent diodes at 1300 nm
Author(s): Christian Velez; Lorenzo Occhi; Marco Rossetti; Lianhe H. Li; Andrea Fiore
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Paper Abstract

A Superluminescent Light Emitting Diode (SLED) is an ideal optical broadband source for applications like Optical Coherence Tomography (OCT) and other fiber optic based imaging techniques. High optical output power and large optical bandwidth are key features for these devices. The short coherence length related to this large bandwidth allows the realization of OCT systems with higher sensitivity. Semiconductor devices based on quantum dots (QD) are ideally suited as the active material for SLEDs since the size dispersion typical of self-assembled growth naturally produces a large inhomogeneous broadening. The large spacing between different energy levels can lead to improved thermal stability as well. In this paper we report, ridge-waveguide devices based on five stacks of self-assembled InAs/GaAs QDs. SLED devices with output powers up to 1.5 mW emitting around 1300 nm have been realized. Spectral analysis at 20°C shows a 121 nm FWHM. Temperature characteristics in the range 10-80°C are also reported.

Paper Details

Date Published: 13 April 2005
PDF: 8 pages
Proc. SPIE 5690, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine IX, (13 April 2005); doi: 10.1117/12.588716
Show Author Affiliations
Christian Velez, EXALOS AG (Switzerland)
Lorenzo Occhi, EXALOS AG (Switzerland)
Marco Rossetti, Ecole Polytechnique Federale de Lausanne (Switzerland)
Lianhe H. Li, Ecole Polytechnique Federale de Lausanne (Switzerland)
Andrea Fiore, Ecole Polytechnique Federale de Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 5690:
Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine IX
Valery V. Tuchin; Joseph A. Izatt; James G. Fujimoto, Editor(s)

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