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Optical Engineering

Design of compact ring resonator and Mach-Zehnder interferometer with air trenches
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Paper Abstract

We discuss the design of a compact ring resonator (RR) and Mach-Zehnder interferometer (MZI) in a low-refractive-index-contrast waveguide material system through the use of air trenches. A narrow air trench at the intersection of one input and two output waveguides can function as a high-efficiency splitter, while wider air trenches operate as waveguide bends. We first discuss the design of individual splitters and bends and then show how they can be used to realize a compact MZI and RR. The RR has a footprint of only 70×100 µm, and its optical efficiency at the drop wavelengths is ≈86%. The free spectral range and full width at half maximum are 7.2 and 0.5 nm, while the Q factor is >3,000. The MZI occupies only 165×130 µm, and its calculated optical efficiency is 90%.

Paper Details

Date Published: 1 May 2006
PDF: 7 pages
Opt. Eng. 45(5) 054602 doi: 10.1117/1.2202926
Published in: Optical Engineering Volume 45, Issue 5
Show Author Affiliations
Seunghyun Kim, Univ. of Alabama/Huntsville (United States)
Jianhua Jiang, The Univ. of Alabama in Huntsville (United States)
Gregory P. Nordin, Brigham Young Univ. (United States)

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