Patent ID: 6563985
Filing Date: 2003-05-13
Classification: G02F

Abstract:
An optical filter that has a wavelength response over a portion of the spectrum and that is tunable to different wavelengths in said portion of the spectrum, said optical filter comprising:a core with a long period grating disposed thereon; a first cladding layer disposed on said core and a second electro-optic cladding layer disposed on said first cladding layer, wherein said first cladding layer has an ultra-thin thickness that supports only a single resonant band over said portion of the spectrum as compared to greater thicknesses of said first cladding that support a plurality of resonant bands over said portion of the spectrum, wherein said ultra-thin thickness is in the range of about 20 to about 40 &mgr;m and wherein said resonant band is tunable to said different wavelengths by a voltage applied to said second electro-optic cladding layer.