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Proceedings Paper

Advanced integrated spectrometer designs for miniaturized optical coherence tomography systems
Author(s): B. I. Akca; B. Považay; L. Chang; A. Alex; K. Wörhoff; R. M. de Ridder; W. Drexler; M. Pollnau
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Paper Abstract

Optical coherence tomography (OCT) has enabled clinical applications that revolutionized in vivo medical diagnostics. Nevertheless, its current limitations owing to cost, size, complexity, and the need for accurate alignment must be overcome by radically novel approaches. Exploiting integrated optics, the central components of a spectral-domain OCT (SD-OCT) system can be integrated on a chip. Arrayed-waveguide grating (AWG) spectrometers with their high spectral resolution and compactness are excellent candidates for on-chip SD-OCT systems. However, specific design-related issues of AWG spectrometers limit the performance of on-chip SD-OCT systems. Here we present advanced AWG designs which could overcome the limitations arising from free spectral range, polarization dependency, and curved focal plane of the AWG spectrometers. Using these advanced AWG designs in an SD-OCT system can provide not only better overall performance but also some unique aspects that a commercial system does not have. Additionally, a partially integrated OCT system comprising an AWG spectrometer and an integrated beam splitter, as well as the in vivo imaging using this system are demonstrated.

Paper Details

Date Published: 18 June 2013
PDF: 6 pages
Proc. SPIE 8802, Optical Coherence Tomography and Coherence Techniques VI, 880202 (18 June 2013); doi: 10.1117/12.2032504
Show Author Affiliations
B. I. Akca, Univ. Twente (Netherlands)
B. Považay, Medizinische Univ. Wien (Austria)
L. Chang, Univ. Twente (Netherlands)
A. Alex, Medizinische Univ. Wien (Austria)
K. Wörhoff, Univ. Twente (Netherlands)
R. M. de Ridder, Univ. Twente (Netherlands)
W. Drexler, Medizinische Univ. Wien (Austria)
M. Pollnau, Univ. Twente (Netherlands)

Published in SPIE Proceedings Vol. 8802:
Optical Coherence Tomography and Coherence Techniques VI
Brett E. Bouma; Rainer A. Leitgeb, Editor(s)

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