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Research activity at Architecture explores a wide variety of significant research areas within architecture and the built environment. Among these is the better exploitation of innovative construction technologies and ICT to optimise 'total building performance', as well as reduce waste and environmental impact. Sustainable architectural and urban design is an important component of this. To this end, the Cluster for Research in Design and Sustainability (CRiDS) focuses its research energies towards developing resilient responses to the social, environmental and economic challenges associated with urbanism and cities, in both the developed and developing world.

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GaInNAs/GaAs Bragg-mirror-based structures for novel 1.3um device applications

Calvez, S. and Hopkins, J.M. and Smith, S.A. and Clark, A.H. and Macaluso, R. and Sun, H.D. and Dawson, M.D. and Jouhti, T. and Pessa, M. and Gundogdu, K. and Hall, K.C. and Boggess, T.F. (2004) GaInNAs/GaAs Bragg-mirror-based structures for novel 1.3um device applications. Journal of Crystal Growth, 268 (3-4). pp. 457-465. ISSN 0022-0248

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Abstract

We report the use of GaInNAs/GaAs material system for a range of 1.3 μm vertical-cavity devices namely VCSELs, VCSOAs, VECSELs and SESAMs. Using optical pumping, we demonstrate that up to 4 mW of 1290 nm output power can be fibre-coupled from a VCSEL. We also show that tayloring the VCSEL structure allows to produce a monolithic long-wavelength VCSOA with up to 16 dB of gain. We also report the first demonstration of a 1.3 μm VECSEL with more than 0.5 W of CW ouptut power. Finally, annealing effects on the properties of a GaInNAs SBR and modelocking of two Nd:doped solid state lasers using this element are described.