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Automated optical monitoring wavelength selection for thin-film filters

Abstract : In this paper we study the wavelength selection process for optical monitoring of thin film filters. We first discuss the technical limitations of monitoring systems as well as the criteria defining the sensitivity of different wavelengths to thickness errors. We then present an approach that considers the best monitoring wavelength for each individual layer with a monitoring strategy selection process that can be fully automated. We finally validate experimentally the proposed approach on several optical filters of increasing complexity. Optical interference filters with close to theoretical performances are demonstrated.
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https://hal-amu.archives-ouvertes.fr/hal-03407010
Contributor : Julien Lumeau Connect in order to contact the contributor
Submitted on : Thursday, October 28, 2021 - 11:14:50 AM
Last modification on : Thursday, November 25, 2021 - 10:19:27 AM

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Distributed under a Creative Commons Attribution 4.0 International License

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Janis Zideluns, Fabien Lemarchand, Detlef Arhilger, Harro Hagedorn, Julien Lumeau. Automated optical monitoring wavelength selection for thin-film filters. Optics Express, Optical Society of America - OSA Publishing, 2021, 29 (21), pp.33398-331413. ⟨10.1364/OE.439033⟩. ⟨hal-03407010⟩

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