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Producing electro-optical modulation in thin film lithium niobium oxide.(ELECTRONICS)
Advanced Ceramics Report, May, 2008
A team from University of Wisconsin at Madison and Structured Materials Industries Inc (SMI), both USA, working under a National Science Foundation Phase II Small Business Technology Transfer contract, have demonstrated the world's first metal-organic chemical vapour deposition (MOCVD)-produced thin film lithium niobium oxide (LiNb[O.sub.3]) electro-optic modulator.
Conventionally produced modulators use diffusion doping to create an index-guided channel in bulk LiNb[O.sub.3], which has limited achievable device size. However, by doping the structure during MOCVD growth, and then patterning, a well defined ridge waveguide can be produced, which in turn allows dramatically tighter device tolerances. The end result is anticipated to yield a doubling in device...
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