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References (4)
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Lin Yang, Hongli Xin, Q. Fang, Chunxia Wang, Fang Li, Zhiming Li, Yuliang Liu, Qiming Wang (2004)
New type of multimode-interference-type thermo-optic variable optical attenuatorOptical Engineering, 43
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Y. Choi, C. Kim, Young-Se Kwon (1982)
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Lin Yang, Yuliang Liu, Yi Cheng, Wei Wang, Qiming Wang (2003)
Multimode-interference-type thermo-optic variable optical attenuator with a response frequency of 10 kHzOptical Engineering, 42
- Publisher
- SPIE
- Copyright
- Copyright © 2005 Society of Photo-Optical Instrumentation Engineers
- ISSN
- 0091-3286
- eISSN
- 1560-2303
- DOI
- 10.1117/1.1885511
- Publisher site
- See Article on Publisher Site
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. © 2005 Society of Photo-Optical Instrumentation Engineers.
Journal
Optical Engineering – SPIE
Published: Apr 1, 2005
Keywords: variable optical attenuator; thermal isolating grooves; Mach-Zehnder interferometers; insertion loss; power consumption; response time