G - Physics – 02 – B
Patent
G - Physics
02
B
88/97.5
G02B 6/00 (2006.01) G02B 6/04 (2006.01) G02B 6/28 (2006.01)
Patent
CA 1204010
FIBER OPTIC DIRECTIONAL COUPLER Abstract of the Invention A fiber optic directional coupler comprises a pair of bases, with respective longitudinal, arcuate grooves formed therein on confronting faces thereof, for mounting a pair of optical fibers in close proximity. A portion of the cladding is removed from each of the fibers to form planar facing surfaces which permits the spacing between the fiber cores to be within a predetermined critical zone so that guided modes of the fibers interact, through their evanescent fields, to cause light to be transferred by evanescent field coupling between the fibers. The coupler is "tuned" to a desired coupling efficiency by offsetting the planar facing surfaces to increase the spacing between the fiber cores. A method of manufacture of the coupler includes procedures which permit the coupler halves to be made symmetrical. The method also permits couplers having given coupling characteristics to be reproduced.
411079
Board Of Trustees Of The Leland Stanford Junior University
Gowling Lafleur Henderson Llp
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