Toward spectral-domain optical coherence tomography on a chip


Akça, B.I. and Nguyen, V.D. and Kalkman, J. and Ismail, N. and Sengo, G. and Sun, F. and Driessen, A. and Leeuwen, A.G.J.M. van and Pollnau, M. and Wörhoff, K. and Ridder, R.M. de (2012) Toward spectral-domain optical coherence tomography on a chip. IEEE journal of selected topics in quantum electronics, 18 (3). 1223 - 1233. ISSN 1077-260X

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Abstract:We present experimental results of a spectral-domain optical coherence tomography system based on an integrated optical spectrometer. A 195-channel arrayed-waveguide-grating (AWG) spectrometer with 0.4-nm channel spacing centered at 1300 nm and a 125-channel AWG with 0.16-nm channel spacing centered at 800 nm have been fabricated in silicon oxynitride waveguide technology. Interferometric distance measurements have been performed by launching light from a broadband source into a free-space Michelson interferometer, with its output coupled into the AWG. A maximum imaging depth of 1 mm and axial resolution of 25 and 20 ?m in air are demonstrated for the 800- and 1300-nm ranges, respectively.
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Copyright:© 2012 IEEE
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