Article
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Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-shifters
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Version 1
: Received: 21 April 2019 / Approved: 22 April 2019 / Online: 22 April 2019 (11:33:15 CEST)
A peer-reviewed article of this Preprint also exists.
Niraula, B.B.; Rizal, C. Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-Shifters. Materials 2019, 12, 1555. Niraula, B.B.; Rizal, C. Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-Shifters. Materials 2019, 12, 1555.
Abstract
This paper reports design of a 2 × 4 hybrid multimode interferometer-Mach-zehnder interferometer (MMI-MZI) configuration and compact thermo-optical switch consisting of slab waveguides on the silicon-on-insulator (SOI), platform. The device consisted of two identical MMIs as power splitters and couplers that are connected with two identical MMI-based phase shifters, and linear tapers at both ends of the MMIs to minimize the power coupling loss. A thin Al pad is used as a heating element, and a trench is created around this pad to prevent heat from spreading and to minimize loss. The calculated average thermo-optical switching power consumption, excess loss, and power imbalance are 1.4 mW, 0.9 dB, and 0.1 dB, respectively. The overall footprint of the device is 6 × 304 μm2. The new heating method has advantages of compact size, ease of fabrication on SOI platform with the current CMOS technology, and offers low excess loss and power consumption as demanded by devices based on SOI technology. The device can act as two independent optical switches in one structure.
Keywords
multimode interferometer; MMI; thermo-optical switch; SOI technology; biosensor
Subject
Engineering, Electrical and Electronic Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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