Coupling of planar waveguides with hyperbolic secant refractive-index profiles by butt joining: beam-size controller design.
An analysis of the butt-joining coupling between two inhomogeneous planar optical waveguides with hyperbolic secant refractive-index profiles is made from the point of view of geometrical optics. Furthermore, the design of a new device to contract or expand a collimated beam is presented, and a relationship between sizes of the input and output beams is obtained.
Bao
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Pérez
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Gómez-Reino
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