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PLZT film waveguide Mach-Zehnder electrooptic modulator

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7 Author(s)
Jin, G.H. ; Center of Electro-Opt. Technol., Tufts Univ., Medford, MA, USA ; Zou, Y.K. ; Fuflyigin, V. ; Liu, S.W.
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We report the numerical analysis and the fabrication of a reversed-ridge PLZT film waveguide. It is single-mode, has low transmission loss, and has large transverse cross-section suitable for efficient coupling to single-mode optical fibers. We used this structure to fabricate Mach-Zehnder (MZ) waveguide modulators. The field distribution in the channel and Y branch waveguides was calculated using a beam propagation method to analyze the modal profiles and the propagation loss. The reversed-ridge waveguides and the MZ structures were fabricated on r-sapphire substrates with a patterned ITO spacer film by sol-gel deposition. At 1.55 /spl mu/m the propagation loss was 2.7 dB/cm. In the MZ, the half-wave modulation voltage was 8.5 V using 1.55 /spl mu/m light and electrode length of 3.5 mm.

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Lightwave Technology, Journal of  (Volume:18 ,  Issue: 6 )