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Measurement and analysis of periodic coupling in silicon-clad planar waveguides

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3 Author(s)
G. McWright ; Univ. of Virginia, Charlottesville, VA, USA ; T. Batchman ; M. Stanziano

Computer modeling studies indicate that planar dielectric waveguides clad with silicon exhibit a damped periodic oscillation in their attenuation and phase characteristics. The effect is due to a periodic coupling between the lossy, guided modes in the silicon film and the TE0mode of the dielectric waveguide. Experimental confirmation of the periodic coupling for a wavelength of 632.8 nm is presented. Propagation characteristics for a wavelength of 1150 nm were investigated for application in integrated optical modulators. Frequency filtering properties of silicon-clad waveguides are also examined and it is shown that the silicon thickness controls the filter response curve.

Published in:

IEEE Journal of Quantum Electronics  (Volume:18 ,  Issue: 10 )