Rahman, B.M.A. and Haxha, S. and Haxha, V. and Grattan, K.T.V. (2006) Design optimization of high-speed optical modulators - art. no. 63890X. In: Achyut, K.d. and Yasutake, O. and Niloy, K.d. and Jesper, M., eds. Active and Passive Optical Components for Communications VI. Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE), 6389-33. SPIE-Int Soc Optical Engineering, 1000 20th St, Po Box 10, Bellingham, WA 98227-0010 USA, USA X3890-X3890. ISBN 0-8194-6487-2 .
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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:||Conference or workshop item (Paper)|
|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:||Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Broadband & Wireless Communications|
|Depositing User:||Yiqing Liang|
|Date Deposited:||17 Aug 2009 13:38|
|Last Modified:||14 Jan 2010 14:36|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/9716 (The current URI for this page, for reference purposes)|
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