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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 5, Iss. 4 — Apr. 1, 2014
  • pp: 1050–1061

Photonic integrated Mach-Zehnder interferometer with an on-chip reference arm for optical coherence tomography

Günay Yurtsever, Boris Považay, Aneesh Alex, Behrooz Zabihian, Wolfgang Drexler, and Roel Baets  »View Author Affiliations

Biomedical Optics Express, Vol. 5, Issue 4, pp. 1050-1061 (2014)

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Optical coherence tomography (OCT) is a noninvasive, three-dimensional imaging modality with several medical and industrial applications. Integrated photonics has the potential to enable mass production of OCT devices to significantly reduce size and cost, which can increase its use in established fields as well as enable new applications. Using silicon nitride (Si3N4) and silicon dioxide (SiO2) waveguides, we fabricated an integrated interferometer for spectrometer-based OCT. The integrated photonic circuit consists of four splitters and a 190 mm long reference arm with a foot-print of only 10 × 33 mm2. It is used as the core of a spectral domain OCT system consisting of a superluminescent diode centered at 1320 nm with 100 nm bandwidth, a spectrometer with 1024 channels, and an x-y scanner. The sensitivity of the system was measured at 0.25 mm depth to be 65 dB with 0.1 mW on the sample. Using the system, we imaged human skin in vivo. With further optimization in design and fabrication technology, Si3N4/SiO2 waveguides have a potential to serve as a platform for passive photonic integrated circuits for OCT.

© 2014 Optical Society of America

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(130.0130) Integrated optics : Integrated optics
(170.4500) Medical optics and biotechnology : Optical coherence tomography

ToC Category:
Optical Coherence Tomography

Original Manuscript: January 6, 2014
Revised Manuscript: February 25, 2014
Manuscript Accepted: February 25, 2014
Published: March 3, 2014

Günay Yurtsever, Boris Považay, Aneesh Alex, Behrooz Zabihian, Wolfgang Drexler, and Roel Baets, "Photonic integrated Mach-Zehnder interferometer with an on-chip reference arm for optical coherence tomography," Biomed. Opt. Express 5, 1050-1061 (2014)

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