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Novel vertical directional coupler made by field-assisted ion-exchanged slab waveguides in glass

Novel vertical directional coupler made by field-assisted ion-exchanged slab waveguides in glass

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Novel vertical directional couplers, consisting of graded-index planar waveguides, were realised by field-assisted K+− ion exchange in glass. Normal mode measurements of the coupling length are compared to results based on numerical simulations of the diffusion equation and the beam propagation method.


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