Low drive-voltage and high-bandwidth electro-optic modulators based on BaTiO3 thin-film waveguides

D. G. Sun*, X. H. Fu, Z. F. Liu, S. T. Ho, B. W. Wessels

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We investigated electro-optic modulator structures to target low drive voltage, high-speed modulation, and small device size with c-axis grown BaTiO3/MgO ferro-electric thin films. In this study, the calculations are focused on the ideal thin film with a quadratic relation between the half-wave drive voltage Vπ and the interaction length L in the electro-optic modulation case we obtained in previous work. With the quadratic electro-optic modulating relation and the optimal rib waveguide structure of BaTiO3/MgO thin films, the frequency-voltage-size performances for 2.5GHz, 10GHz, 40GHz, and 100GHz modulation bandwidths have been obtained under half-wave drive voltages of 0.8V, 1.6V, 3.0V and 4.8V, respectively, for the ideal film with r51=730 pm/V at 1550nm wavelength, where both the phase velocity matching condition and the conductor induced microwave attenuation are considered. The required device lengths to achieve these four typical values of modulation bandwidth are 3.3 mm, 0.8 mm, 0.4 mm and 0.2 mm, respectively. With the c-axis grown BaTiO3/MgO crystal thin films and the quadratic electro-optic modulating relation, an electro-optic coefficient of reff=180 pm/V for the c-axis grown BaTiO3/MgO ferro-electric thin films was measured, which is relatively far from the ideal value of r51=560 pm/V. copyright The Electrochemical Society.

Original languageEnglish (US)
Title of host publicationScience and Technology of Dielectrics for Active and Passive Photonic Devices
PublisherElectrochemical Society Inc.
Pages125-134
Number of pages10
Edition11
ISBN (Print)1566775159, 9781566775151
DOIs
StatePublished - 2006
EventScience and Technology of Dielectrics for Active and Passive Photonic Devices - 210th Electrochemical Society Meeting - Cancun, Mexico
Duration: Oct 29 2006Nov 3 2006

Publication series

NameECS Transactions
Number11
Volume3
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherScience and Technology of Dielectrics for Active and Passive Photonic Devices - 210th Electrochemical Society Meeting
CountryMexico
CityCancun
Period10/29/0611/3/06

ASJC Scopus subject areas

  • Engineering(all)

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