Method and apparatus for connecting an optical fiber to a strip

Details Method and apparatus for connecting an optical fiber to a strip Method and apparatus for connecting an optical fiber to a strip

1992-03-30

1993-08-10

Ullah, Akm E.

Optical waveguides

With optical coupler

Particular coupling structure

385 39, G02B 610, G02B 630

Patent

active

052356582

ABSTRACT:
This invention is directed toward joining an optical fiber to a waveguide on a silicon or silica substrate. In a preferred embodiment, a discontinuity such as a notch is provided in the substrate along each side of a waveguide. The notches, which extend back from the end of each waveguide form air gaps between the ends of adjacent waveguides. Now, when an optical fiber is butt coupled to a waveguide on a substrate with adhesive, the notches at either side of the waveguides prevent adhesive from flowing along the edge of the substrate and onto the end of an adjacent waveguide. In addition, the adhesive flows around and encapsulates the substrate projections defined by the notches along the ends of the waveguide to provide a sturdy butt connection.

REFERENCES:
patent: 4813755 (1989-03-01), Mannscake
patent: 4883743 (1989-11-01), Booth et al.
patent: 5062681 (1991-11-01), Furmanak et al.
"Fiber Attachment for Guided Wave Devices," E. J. Murphy, J. Lightwave Technology, vol. 6, No. 6, Jun. 1988.
"Efficient Multichannel Integrated Optics Star Coupler on Silicon" C. Dragone, et al., IEEE Photonics Tech. Lett., vol. 1, No. 8, Aug. 1989.
"Integrated Four-Channel Mach-Zehnder Multi/Demultiplexer Fabricated with Phosphorous Doped SiO.sub.2 Waveguides on Si" B. H. Verbeek, et al., J. of Lightwave Tech., vol. 6, No. 6, Jun. 1988.

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