Molecular bonded fiber optic couplers and method of fabrication

Details Molecular bonded fiber optic couplers and method of fabrication Molecular bonded fiber optic couplers and method of fabrication

1986-01-07

1988-04-19

Sikes, William L.

350 9610, 350 9629, 350 9620, G02F 202, G02B 626

Patent

active

047385111

ABSTRACT:
A fiber optic coupler is formed by heating juxtaposed optically flat surfaces formed on two lengths of optical fiber to the glass transition temperature. The fibers bond together while preserving the molecular composition of the fibers at bonded region. Depending upon the depth to which the fibers are lapped to form the optically flat surfaces, the coupler may be either an evanescent field coupler or a core intercept coupler. The fibers may be mounted on curved substrates and then lapped to form the optically flat surfaces. The optical throughput of a fiber may be monitored during assembly of a coupler to permit adjustment of the positions of the optically flat surfaces to produce a desired coupling efficiency. The fibers may then be bonded together by application of energy from a suitable coherent light source such as a CO.sub.2 laser.

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R. A. Bergh, M. J. F. Digonnet, H. C. Lefevre, S. A. Newton, and H. J. Shaw Single Mode Fiber Optic Components.
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