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:
Aug. 18, 2015
Filed:
Feb. 08, 2013
Massachusetts Institute of Technology, Cambridge, MA (US);
Anuradha M. Agarwal, Weston, MA (US);
Antonio Canciamilla, Olgiate Olona, IT;
Francesco Morichetti, Novara, IT;
Stefano Grillanda, Cernusco sul Naviglio, IT;
Lionel C. Kimerling, Concord, MA (US);
Andrea Melloni, Milan, IT;
Jurgen Michel, Arlington, MA (US);
Vivek Raghunathan, Cambridge, MA (US);
Vivek Singh, Cambridge, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
In a photonic waveguide, there is provided an undercladding layer and a waveguide core, having a cross-sectional height and width, that is disposed on the undercladding layer. The waveguide core comprises a waveguide core material having a thermo-optic coefficient. A refractive index tuning cladding layer is disposed on top of the waveguide core. The refractive index tuning cladding layer comprises a refractive index tuning cladding material having an adjustable refractive index and an absorption length at a refractive index tuning radiation wavelength. A thermo-optic coefficient compensation cladding layer is disposed on top of the refractive index tuning cladding layer. The thermo-optic coefficient compensation cladding layer comprises a thermo-optic coefficient compensation material having a thermo-optic coefficient that is of opposite sign to the thermo-optic coefficient of the waveguide core material. The thermo-optic coefficient compensation cladding layer provides at least partial compensation for the waveguide core thermo-optic coefficient.