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Authors: M. Verbist, D. Van Thourhout, W. Bogaerts
Title: Weak Gratings in Silicon-on-Insulator for Spectral Filters based on Volume Holography
Format: International Journal
Publication date: 2/2013
Journal/Conference/Book: Optics Letters
Volume(Issue): 38(3) p.386-388
DOI: 10.1364/ol.38.000386
Citations: 14 ( - last update: 14/7/2024)
10 (OpenCitations - last update: 10/5/2024)
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We demonstrate integrated holographic grating filters, that can be designed toward any desired target spectrum. A straightforward design method transforms this target spectrum into a weak effective refractive index variation. The filters are implemented in high-contrast silicon-on-insulator by modulating the width of the shallow etched sides of a ridge waveguide. Measurements show that this is a promising approach to integrate flexible and versatile filters on photonic chips to enable more complex applications.

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