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:
May. 29, 2018
Filed:
Aug. 21, 2013
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Antonella Bogoni, Pisa, IT;
Piero Castoldi, Pisa, IT;
Isabella Cerutti, Pisa, IT;
Mirco Scaffardi, Pisa, IT;
Nicola Andriolli, Pisa, IT;
Telefonaktiebolget LM Ericsson (publ), Stockholm, SE;
Abstract
An optical switch () comprising: inputs () to receive input optical signals at respective wavelengths and having planar wavefronts; conversion apparatus () to convert each input optical signal into a respective optical signal having a respective helical wavefront, each helical wavefront having a different orbital angular momentum, OAM; optical multiplexing apparatus () to receive each helical wavefront optical signal from the conversion apparatus and to multiplex the helical wavefront optical signals into an OAM multiplexed optical signal; and optical demultiplexing apparatus () comprising a plurality of outputs (), the optical demultiplexing apparatus arranged to: receive the OAM multiplexed optical signal; demultiplex the OAM multiplexed optical signal into a plurality of wavelength multiplexed optical signals each having a different OAM; reconvert each wavelength multiplexed optical signal from its helical wavefront into a respective planar wavefront; and deliver each planar wavefront wavelength multiplexed optical signal to a respective one of the outputs according to the respective OAM it had before reconversion.