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US 12,044,906 B2Granted
Broadband faraday rotator
AssigneeSoreq Nuclear Research Center
InventorBruno Sfez
Life of this patent
Estimating the term…
Abstract
An apparatus includes a dispersive-collimating element, a Faraday material apparatus and a focusing-dispersive element. The dispersive-collimating element assigns each beam wavelength to a particular spatial position. The beams are parallel one to the other. The Faraday material apparatus provides a polarization rotation independently for each wavelength, and the focusing-dispersive element recombines the different wavelengths into one single beam.
Claims6
An apparatus comprising:
- a dispersive-collimating element, a Faraday material apparatus and a focusing-dispersive element such that said dispersive-collimating element assigns each beam wavelength to a particular spatial position, the beams being parallel one to the other, said Faraday material apparatus provides a polarization rotation independently for each wavelength, and said focusing-dispersive element recombines the wavelengths into one single beam, wherein said Faraday material apparatus comprises a Faraday material with a non-zero Verdet coefficient located within a magnetic field so that each wavelength propagates for a different length within the Faraday material so as to generate a polarization rotation that is the same for all the wavelengths, and wherein a shape of the Faraday material is complemented to a rectangular shape by a transparent material with a near-zero Verdet coefficient and index-matched to a refractive index of the Faraday material, so that beams exit in a direction that is parallel to the impinging beam.
An apparatus comprising:
- a dispersive-collimating element, a Faraday material apparatus and a focusing-dispersive element such that said dispersive-collimating element assigns each beam wavelength to a particular spatial position, the beams being parallel one to the other, said Faraday material apparatus provides a polarization rotation independently for each wavelength, and said focusing dispersive element recombines the wavelengths into one single beam, wherein said Faraday material apparatus comprises a Faraday material with a non-zero Verdet coefficient located within a magnetic field so that each wavelength propagates for a different length within the Faraday material so as to generate a polarization rotation that is the same for all the wavelengths, and wherein a shape of the Faraday material is complemented to a rectangular shape by using a complemented part of said Faraday material, and distanced from said Faraday material by a transparent material with a near-zero Verdet coefficient and index-matched to a refractive index of the Faraday material, and said complemented part is located in a region where the magnetic field is approximately null.
Dependencies are inferred from the claim text.