Optical intensity modulator and switch comprising the same

Details Optical intensity modulator and switch comprising the same Optical intensity modulator and switch comprising the same

G - Physics

02

F

G02F 1/01 (2006.01) G02B 6/125 (2006.01) G02F 1/065 (2006.01) G02F 1/315 (2006.01)

Patent

CA 2281451

The invention pertains to an optical intensity modulator which comprises a waveguide containing a core adjacent to at least one cladding layer and exhibits a refractive index n(core) different from the refractive index n(cl) of the cladding layer, characterized in that the waveguide is a bent channel waveguide and that the intensity modulator contains means for altering the temperature at or near the bend and that the core and the cladding layer exhibit different thermo-optic coefficients at the bend such that the contrast between n(core) and n(cl) can be changed by altering the temperature. The said optical intensity modulator are more compact in size and more efficient with regard to energy consumption. The invention also pertains to thermo-optic switches and thermo-optic cascaded switches comprising the optical intensity modulator and to the use of the optical intensity modulator as a tunable attenuator.

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