Optical coherence tomography with high power quantum-dot superluminescent diodes

Krstajić, Nikola; Smallwood, R. H.; Childs, David; Greenwood, P. D. L.; Hugues, Maxime; Kennedy, K.; Hopkinson, M.; Groom, K. M.; Hogg, R. A.; Smith, Louise E.; Matcher, Stephen J.; MacNeil, Sheila; Bonesi, Marco

doi:10.1109/leos.2009.5343317

Cited by 1 publication

(1 citation statement)

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“…3(b). Good correlation between calculated and measured PSFs has been found [28]. The side-lobe suppression ratio and 3 dB linewidth of the device are plotted in Fig.…”

Section: Device Characteristicssupporting

confidence: 57%

Quantum Dot Superluminescent Diodes for Optical Coherence Tomography: Device Engineering

Greenwood

Childs

Kennedy

et al. 2010

IEEE J. Select. Topics Quantum Electron.

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ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Abstract-We present a 18 mW fiber-coupled single-mode superluminescent diode with 85 nm bandwidth for application in optical coherence tomography (OCT). First, we describe the effect of quantum dot (QD) growth temperature on optical spectrum and gain, highlighting the need for the optimization of epitaxy for broadband applications. Then, by incorporating this improved material into a multicontact device, we show how bandwidth and power can be controlled. We then go on to show how the spectral shape influences the autocorrelation function, which exhibits a coherence length of <11 µm, and relative noise is found to be 10 dB lower than that of a thermal source. Finally, we apply the optimum device to OCT of in vivo skin and show the improvement that can be made with higher power, wider bandwidth, and lower noise, respectively.Index Terms-Optical coherence tomography (OCT), quantum dot (QD), skin imaging, superluminescent diodes (SLEDs).

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“…3(b). Good correlation between calculated and measured PSFs has been found [28]. The side-lobe suppression ratio and 3 dB linewidth of the device are plotted in Fig.…”

Section: Device Characteristicssupporting

confidence: 57%