On-chip Mach-Zehnder interferometer for OCT systems

Ton G. Van Leeuwen*, Imran B. Akca, Nikolaos Angelou, Nicolas Weiss, Marcel Hoekman, Arne Leinse, Rene G. Heideman

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

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By using integrated optics, it is possible to reduce the size and cost of a bulky optical coherence tomography (OCT) system. One of the OCT components that can be implemented on-chip is the interferometer. In this work, we present the design and characterization of a Mach-Zehnder interferometer consisting of the wavelength-independent splitters and an on-chip reference arm. The Si3N4 was chosen as the material platform as it can provide low losses while keeping the device size small. The device was characterized by using a home-built swept source OCT system. A sensitivity value of 83 dB, an axial resolution of 15.2 μm (in air) and a depth range of 2.5 mm (in air) were all obtained.

Original languageEnglish
Pages (from-to)103-106
Number of pages4
JournalAdvanced Optical Technologies
Issue number1-2
Publication statusPublished - 25 Apr 2018


  • Mach-Zehnder interferometer
  • on-chip
  • optical coherence tomography
  • silicon nitride


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