Integrated Optics

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

[+] Author Affiliations
Seunghyun Kim

University of Alabama in Huntsville, Nano and Micro Devices Center, OB 418, Huntsville, Alabama 35899

Jianhua Jiang

University of Alabama in Huntsville, Nano and Micro Devices Center, OB 418, Huntsville, Alabama 35899

Gregory P. Nordin

University of Alabama in Huntsville, Nano and Micro Devices Center, OB 418, Huntsville, Alabama 35899

Opt. Eng. 45(5), 054602 (May 23, 2006). doi:10.1117/1.2202926
History: Received August 17, 2005; Revised September 08, 2005; Accepted September 09, 2005; Published May 23, 2006
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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 70×100μm, and its optical efficiency at the drop wavelengths is 86%. The free spectral range and full width at half maximum are 7.2 and 0.5nm, while the Q factor is >3,000. The MZI occupies only 165×130μm, and its calculated optical efficiency is 90%.

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© 2006 The Society of Photo-Optical Instrumentation Engineers

Citation

Seunghyun Kim ; Jianhua Jiang and Gregory P. Nordin
"Design of compact ring resonator and Mach-Zehnder interferometer with air trenches", Opt. Eng. 45(5), 054602 (May 23, 2006). ; http://dx.doi.org/10.1117/1.2202926


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