Integrated optics waveguides with large phase shifts

Details Integrated optics waveguides with large phase shifts Integrated optics waveguides with large phase shifts

1989-03-13

1990-07-10

Lee, John D.

350 9615, G02B 612

Patent

active

049403028

ABSTRACT:
A technique for producing an integrated optics waveguide having a large index of refraction difference with respect to an otherwise similar waveguide that does not utilize the invention. A proton exchange region is formed in a lithium niobate substrate, and a titanium waveguide is formed in the substrate within the proton exchange region. The dimensions of the waveguide and proton exchange region are selected such that substantially all of the field of the lowest guided mode of the waveguide is contained within the proton exchange region. By utilizing such a waveguide as one arm of an interferometer formed in the substrate, a large optical path length difference between the interferometer arms may be created.

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