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The transverse electrooptic modulator (TEOM): fabrication, properties, and applications in the assessment of waveguide electrooptic characteristics

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3 Author(s)
McMeekin, S. ; Dept. of Electron. & Electr. Eng., Glasgow Univ., UK ; De La Rue, R.M. ; Johnstone, W.

The fabrication of a novel electrooptic modulator with a transverse electrode geometry, formed by parallel electrodes on opposite faces of a thinned lithium niobate substrate straddling a strip waveguide, is reported. The device, referred to as a transverse electrooptic modulator (TEOM), has several advantages over standard electrooptic waveguide modulators using a coplanar electrode geometry. It is shown that it is possible to achieve a 30% reduction in the operating voltage for a given electrode spacing and a substantial reduction in the figure of merit, the power required per unit bandwidth, for electrooptic modulators with either lumped or traveling wave electrode structures. Moreover, a more accurate estimate of the electrooptic coefficients is possible than with modulators using strip waveguides and coplanar electrodes

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Lightwave Technology, Journal of  (Volume:10 ,  Issue: 2 )