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http://ir.mu.ac.ke:8080/jspui/handle/123456789/2965
Title: | Modeling of Ultrawidely Tunable Vertical CavityAir-Gap Filters and VCSELs |
Authors: | Prott, Cornelia Römer, Friedhard Ataro, O. Edwin Daleiden, Jürgen Irmer, Sören Hillmer, Hartmut Tarraf, Amer |
Keywords: | Modeling of Ultrawidely Tunable Vertical CavityAir-Gap Filters |
Issue Date: | Jun-2003 |
Publisher: | IEEE PUBLISHERS |
Abstract: | Tunable vertical cavity devices including an air-gapintegrated in the cavity have been designed, fabricated, andinvestigated. The ultrawide wavelength tuning is realized by mi-cromechanical actuation of Bragg mirror membranes. Based onoptical and mechanical model calculations, the air-gap filters andvertical cavity surface emitting lasers (VCSELs) are designed forinvestigating mainly the optical tuning efficiency. In our research,we focus on two different mirror material systems, dielectricSi3N4SiO2and InP/air-gap Bragg mirrors and on two tuningconcepts, respectively. For the dielectric mirrors, continuoustuning is achieved by thermal actuation of theSi3N4SiO2mirror membranes, and for InP/air-gap mirrors, electrostaticactuation of the InP membranes is used. To verify the opticaland mechanical simulations, InP/air-gap filters are characterizedby measuring reflectance spectra and the tuning behavior. Themeasured results agree with the simulations used to optimize themicromechanical and optical characteristics of air-gap filters andVCSELs for optical communication applications. |
URI: | http://ir.mu.ac.ke:8080/jspui/handle/123456789/2965 |
Appears in Collections: | School of Engineering |
Files in This Item:
File | Description | Size | Format | |
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Ataro O. Edwin.pdf | 1.2 MB | Adobe PDF | View/Open |
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