This thesis reports on the development of waveguide electroabsorption modulators based on multiple quantum well structures. The requirements to the modulator are given by the application in a fiberoptic E-field sensor system. The theoretical calculation of a quantum well structure which is tailored to the application, of the waveguide and of the electrical structure of the device is treated first. Following the technological realization of the developed concept and the characterization of the fabricated devices is described. The achieved performance of the modulators is discussed regarding the influence on the sensorsystem. This results in a minimum detectable field of 20 mV/m, a dynamic range of 105 dB and a frequency range from 100 MHz up to 8 GHz. In a final comparison between the performance of the sensorsystem which is dominated by the modulator and that of commercially available products based on lithiumniobate modulators the advantages of the developed concept are described. In addition to a high sensitivity and a broad frequency range also the operation of the modulator in optical reflection and the low polarization dependence of the modulator which is necessary for the use of conventional non polarization maintaining fibers are worth mentioning.
| Identifer | oai:union.ndltd.org:DUETT/oai:DUETT:duett-04132002-172446 |
| Date | 18 April 2002 |
| Creators | Schmidt, Manuel |
| Contributors | Prof. Dr. Dieter Jäger, Prof. Dr. Peter Jung |
| Publisher | Gerhard-Mercator-Universitaet Duisburg |
| Source Sets | Dissertations and other Documents of the Gerhard-Mercator-University Duisburg |
| Language | German |
| Detected Language | English |
| Type | text |
| Format | text/html, application/pdf |
| Source | http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-04132002-172446/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. Hiermit erteile ich der Universitaet Duisburg das nicht-ausschliessliche Recht unter den unten angegebenen Bedingungen, meine Dissertation, Staatsexamens- oder Diplomarbeit, meinen Forschungs- oder Projektbericht zu veroeffentlichen und zu archivieren. Ich behalte das Urheberrecht und das Recht das Dokument zu veroeffentlichen und in anderen Arbeiten weiterzuverwenden. |
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