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Optical Engineering • Open Access

Influence of thermal isolating grooves on the performance of the Mach-Zehnder interferometer-type thermo-optic variable optical attenuator
Author(s): Yuejiao He; Lin Yang; Qing Fang; Hongli Xin; Fang Li; Yuliang Liu

Paper Abstract

Two types of silicon-on-insulator thermo-optic variable optical attenuators (VOAs) based on a Mach-Zehnder interferometer and a multimode-interference coupler are fabricated, one with thermal isolating grooves to improve heating efficiency and the other without. Comparison of optical and electrical properties, such as insertion losses, the maximum attenuation levels and the corresponding power consumptions, and the response times, is carried out between the two types of VOAs. The comparison results indicate that use of thermal isolating grooves leads to better values for most characteristics and is an effective way to improve the performance of Mach-Zehnder interferometer-type thermo-optic devices.

Paper Details

Date Published: 1 April 2005
PDF: 2 pages
Opt. Eng. 44(4) 040504 doi: 10.1117/1.1885511
Published in: Optical Engineering Volume 44, Issue 4
Show Author Affiliations
Yuejiao He
Lin Yang, Institute of Semiconductors (China)
Qing Fang, Institute of Semiconductors (China)
Hongli Xin, Institute of Semiconductors (China)
Fang Li, Institute of Semiconductors (China)
Yuliang Liu, Institute of Semiconductors (China)

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