Electrooptic modulation up to 40 GHz in a barium titanate thin film waveguide modulator

Pingsheng Tang*, D. J. Towner, T. Hamano, A. L. Meier, B. W. Wessels

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


The high frequency operation of a low-voltage electrooptic modulator based on a strip-loaded BaTiO3 thin film waveguide structure has been demonstrated. The epitaxial BaTiO3 thin film on an MgO substrate forms a composite structure with a low effective dielectric constant of 20.8 at 40 GHz. A 3.9 V half-wave voltage with a 3.7 GHz 3-dB bandwidth and a 150 pm/V effective electrooptic coefficient is obtained for the 3.2mm-long modulator at 1.55 μm. Broadband modulation up to 40 GHz is measured with a calibrated detection system. Numerical simulations indicate that the BaTiO3 thin film modulator has the potential for a 3-dB operational bandwidth in excess of 40 GHz through optimized design.

Original languageEnglish (US)
Pages (from-to)5962-5967
Number of pages6
JournalOptics Express
Issue number24
StatePublished - Nov 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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