Centre National De La Recherche Scientifique

Centre National Detudes Spatiales

Jacques Loesel

Philippe Arguel

Antoine Monmayrant

Olivier Gauthier-Lafaye

Kristel Chan Shin Yu

Anne-Laure Fehrembach

Anne Sentenac

The invention relates to a polarization-insensitive optical filter centered on a wavelength measured in vacuum, comprising: first and second waveguides each having a propagation mode; a first grating formed in or on the surface of the first waveguide, the first grating being periodical at least along a first axis Ox defining a first orthonormal base Oxyz; a second grating formed in or on the surface of the second waveguide, the second grating being periodical at least along a second axis Ox' defining a second orthonormal base Ox&#x2032;y&#x2032;z; wherein the first and second grating are provided one above another and are such that the first axis Ox and the second axis Ox&#x2032; define an angle &#x3be; different from &#xb1;&#x3c0;/2 radians so that, when the first grating is illuminated by a light beam, the propagation modes are excited and have orthogonal fields for an angle of incidence of the light beam.

Polarization-insensitive optical filter which has resonant gratings and is adjustable according to the incidence angle

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Goyrans, France

Jacques Loesel