Programmable light path device

Details Programmable light path device Programmable light path device

1999-05-21

2000-12-05

Phan, James

Optical waveguides

With optical coupler

Switch

385 4, 385 8, 385122, G02B 626

Patent

active

061577537

ABSTRACT:
A switchable waveguide having first and second states. In the first state, the waveguide guides light of a signal wavelength along a predetermined path. In the second state, no guiding of the light occurs. The waveguide includes a guide layer of a guide material having a first index of refraction in the absence of an electric field and a second index of refraction in the presence of the electric field. The electric field is generated in a portion of the guide layer by applying an appropriate electrical signal to a plurality of electrodes that define a guide region in the guide layer. The guide region has an index of refraction that is greater than that of the guide layer in regions adjacent to the guide region. The electrodes are separated from the guide region by a distance of at least one-half times the wavelength of the light being guided. The separation is maintained by arranging the electrodes such that the guide region is created at a location separated from the electrodes.

REFERENCES:
patent: 5596671 (1997-01-01), Rockwell, III

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