The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 2016
Filed:
May. 31, 2012
Thomas Kaempfe, Villeurbanne, FR;
Olivier Parriaux, Lausanne, CH;
Thomas Kaempfe, Villeurbanne, FR;
Olivier Parriaux, Lausanne, CH;
Université Jean-Monnet, Saint-Etienne, FR;
Abstract
The planar polarization transformer for a normally incident optical wave or beam having a given vacuum wavelength λ comprises an optical planar grating between a cover medium of refractive index nand an optical substrate of refractive index n, this planar grating defining a binary index modulation or corrugation of substantially rectangular profile with periodic ridges. This polarization transformer is characterized in that the ridge refractive index nis larger than the substrate refractive index n, the grating period Λ is larger than 0.4·λ/n, the substrate refractive index nis smaller than 2.7·n, and the index modulation or corrugation is designed such that, according to the grating mode dispersion equation, the effective index of the mode TEis larger than the substrate index nand the effective index of the mode TMis larger than the cover refractive index and smaller than the substrate index.