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Design optimization of high-speed optical modulators

Rahman, B. M. Azizur and Haxha, Shyqyri and Haxha, Vesel and Grattan, Kenneth T. V. (2006) Design optimization of high-speed optical modulators. In: Dutta, Achyut K. and Ohishi, Yasutake and Dutta, Niloy K. and Moerk, Jesper, eds. Active and Passive Optical Components for Communications VI. Proceedings of SPIE . SPIE. ISBN 0-8194-6487-2. (doi:10.1117/12.686040) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:9716)

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The effects of design parameters on the modulating voltage and optical bandwidth are reported for lithium niobate, GaAs and polymer electro-optic modulators by using rigorous numerical techniques. It is shown that by etching lithium niobate, the switching voltage can be reduced and the bandwidth improved. For a GaAs-based modulator using higher aluminium content in the buffer layer for a given optical loss can shorten the device length. It is also observed that the dielectric loss and impedance matching play a key role in velocity-matched high-speed modulators with low conductor loss. It is also indicated in the work that by using tantalium pentoxide coating, velocity matching can be achieved for GaAs modulators. The effect of non-vertical side wall on the polarisation conversion and single mode operation and the bending loss of polymer rib waveguide for electro-optical modulators are also reported.

Item Type: Book section
DOI/Identification number: 10.1117/12.686040
Additional information: Article Number: 63890X
Uncontrolled keywords: electrooptic modulator; finite element method; velocity matching; impedance matching; conductor loss; dielectric loss; optical bandwidth
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK5101 Telecommunications
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Yiqing Liang
Date Deposited: 17 Aug 2009 13:38 UTC
Last Modified: 16 Nov 2021 09:48 UTC
Resource URI: (The current URI for this page, for reference purposes)

University of Kent Author Information

Haxha, Shyqyri.

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