Imaging of spectral-domain optical coherence tomography using a superluminescent diode based on InAs quantum dots emitting broadband spectrum with Gaussian-like shape

We developed a low-coherence light source based on self-assembled InAs quantum dots (QDs) with controlled emission wavelengths and applied it to optical coherence tomography (OCT) imaging. A current-driven superluminescent diode (SLD) light source including four layers of QDs exhibits a broadband (8...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2015-04, Vol.54 (4S), p.4-1-04DG07-5
Main Authors: Shibata, Hiroshi, Ozaki, Nobuhiko, Yasuda, Takuma, Ohkouchi, Shunsuke, Ikeda, Naoki, Ohsato, Hirotaka, Watanabe, Eiichiro, Sugimoto, Yoshimasa, Furuki, Kenji, Miyaji, Kunio, Hogg, Richard A.
Format: Article
Language:English
Subjects:
Broadband
Imaging
Indium arsenides
Light sources
Optical Coherence Tomography
Quantum dots
Spectra
Superluminescent diodes
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Summary:We developed a low-coherence light source based on self-assembled InAs quantum dots (QDs) with controlled emission wavelengths and applied it to optical coherence tomography (OCT) imaging. A current-driven superluminescent diode (SLD) light source including four layers of QDs exhibits a broadband (80-nm-bandwidth) emission centered at approximately 1.2 µm with a Gaussian-like spectral shape at room temperature. Spectral-domain OCT (SD-OCT) using the QD-SLD as a light source was developed and imaging with the SD-OCT was demonstrated. The axial resolution was estimated to be approximately 8 µm in air and no apparent side lobes appeared beside the point spread function, indicating the effectiveness of the QD-SLD for high-resolution, noise-reduced OCT imaging.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.54.04DG07