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The simulation of broad spectral bandwidth light sources (semiconductor optical amplifiers (SOA) and superluminescent diodes (SLD)) for application in ophthalmic optical coherence tomography is reported. The device requirements and origin of key device parameters are outlined, and a range of single and double InGaAs/GaAs quantum well (QW) active elements are simulated with a view to application in different OCT embodiments. We confirm that utilising higher order optical transitions is beneficial for single QW SOAs, but may introduce deleterious spectral modulation in SLDs. We show how an addition QW may be introduced to eliminate this spectral modulation, but that this results in a reduction of the gain spectrum width. We go on to explore double QW structures where the roles of the two QWs are reversed, with the narrow QW providing long wavelength emission and gain. We show how this modification in the density of states results in a significant increase in gain-spectrum width for a given current. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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    • [8] LaserMOD a commercially available device simulation package developed by RSOFT Design Group Inc,400 Executive Boulevard, Ste. 100, Ossining, NY 10562, USA
    • [9] P M Mensz, Z S Li, “Comparison of k.p Models For Quantum Well Optoelectronic Devices,” Numerical Simulation of Optoelectronic Devices, 2005. NUSOD '05. Proceedings of 5th Internations Conference (19-22 Sept 2005) DOI: 10.1109/NUSOD.2005.1518142 ISBN: 0-7803-9149-7 IEEE
    • [10] Z Y Zhang, I J Luxmoore, C Y Jin, Q Jiang, K M Groom, D T Childs, M Hopkinson, A G Cullis, R A Hogg, “Effects of Facet Angle on Effective Facet Reflectivity and Operating Characteristics of Quantum Dot Edge Emitting Lasers and Superluminescent Light-Emitting Diodes” Aap. Phys. Lett 91, 081112 (2007)
    • [11] T R Chen, L Eng, Y H Zhuang, A Yariv, “Quantum Well Superluminescent Diode With Very Wide Emission Spectrum,” Appl. Phys. Lett. 56 (14), 2 April 1990 American Institute of Physics 1345
    • [12] Thomas Klein, Wolfgang Wieser, Christoph M Eigenwillig, Benjamin R Biedermann, Robert Huber, “Megahertz OCT for ultrawide-field retinal imaging with a 1050nm Fourier domain mode-locked laser” Optical Society of America 14 February 2011 / Vol. 19, No. 4 / Optics Express 3044
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