Design optimization of high-speed optical modulators

B. M. Azizur Rahman; Shyqyri Haxha; Vesel Haxha; Kenneth T. V. Grattan

doi:10.1117/12.686040

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2 October 2006 Design optimization of high-speed optical modulators

B. M. Azizur Rahman, Shyqyri Haxha, Vesel Haxha, Kenneth T. V. Grattan

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Proceedings Volume 6389, Active and Passive Optical Components for Communications VI; 63890X (2006) https://doi.org/10.1117/12.686040
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

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 modelling 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, the device length can be shortened for a given optical loss. 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 effects of a 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.

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B. M. Azizur Rahman, Shyqyri Haxha, Vesel Haxha, and Kenneth T. V. Grattan "Design optimization of high-speed optical modulators", Proc. SPIE 6389, Active and Passive Optical Components for Communications VI, 63890X (2 October 2006); https://doi.org/10.1117/12.686040

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