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Optical filters with prescribed optical thickness and refined refractive indices
Authors:Larouche Stéphane  Martinu Ludvik
Affiliation:Regroupement Québécois sur les Matériaux de Pointe and Department of Engineering Physics, Ecole polytechnique de Montréal, P.O. Box 6079, Station Centre-Ville, Montréal, Québec, H3C 3A7, Canada. stephane.larouche@polymtl.ca
Abstract:We propose to refine the refractive index of the layers composing optical filters while keeping their optical thicknesses constant. Using this technique, one can optimize filters made of quarter-wave layers using conventional optimization techniques, while preserving the possibility to use turning-point monitoring during their fabrication. Application of this method to the design of a dual narrowband filter and a tilted edge filter demonstrates its effectiveness.
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