Patent ID: 7123796

Claim:
A lightwave coupling device comprising: a waveguide capable of propagating light of a first wavelength through internal reflection; a photoluminescent medium positioned proximate to said waveguide, said photoluminescent medium capable of being selectively optically coupled to said waveguide for receiving light of said first wavelength and emitting light of a second wavelength in response to receiving light of said first wavelength; an electrowetting medium positioned between said waveguide and said photoluminescent medium; first and second electrodes; and a voltage source electrically coupled with said first and second electrodes, said voltage source capable of applying an actuation voltage to said first and second electrodes effective to move said electrowetting medium between a first condition that permits transfer light of said first wavelength from said optical waveguide to said photoluminescent medium and a second condition in which light of said first wavelength remains confined in said waveguide.