Massachusetts Institute of Technology

Politecnico Di Milano

Stefano Grillanda

Andrea Ivano Melloni

Francesco Morichetti

Lionel Cooper Kimerling

Jurgen Michel

Giorgio Ferrari

Anuradha Murthy Agarwal

Antonio Canciamilla

Marco Carminati

Marco Sampietro

Vivek Raghunathan

Vivek Singh

An optical radiation detection system () comprising: an optical medium () structured to define a region () suitable for transmitting an optical radiation and being associated to at least one electric parameter varying as a function of the optical radiation concerning said region; at least one electrode () electrically coupled to the optical medium (), and spaced from said region (), an electric power generator () connected to said at least one electrode () and structured to provide an electric signal (Se) to be applied to the optical medium. Further, the system comprises an electric measuring circuit () connected to said at least one electrode () and structured to provide a measuring electric signal (SM) representing a variation of said at least one electric parameter.

Optical radiation detection system comprising an electric parameter measuring circuit

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.

Athermal photonic waveguide with refractive index tuning

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Cernusco sul Naviglio, Italy

Stefano Grillanda