1985-10-11
1987-10-06
Sikes, William L.
350 9620, G02B 626, G02B 642
Patent
active
046978690
ABSTRACT:
An attenuator for an optical fiber has a tapered screw around which the fiber is looped, the fiber engaging within the screw thread. The fiber is held fixed in position by a spring so that as the screw is rotated the radius of curvature of that part of the fiber held against the screw is altered. Light propagating along the fiber is radiated out at the fiber bend, the level of radiation loss depending on the bend radius of curvature. The attentuator elements are mounted within a light-tight box with the fiber terminating at optical connector components mounted within a wall of the housing. The connector components enable rapid insertion of the attenuator into an optical transmission line to provide an accurate reproducible level of attenuation.
REFERENCES:
patent: 4270839 (1981-06-01), Cross
patent: 4403152 (1983-09-01), Schmid et al.
patent: 4586783 (1986-05-01), Campbell et al.
patent: 4588296 (1986-05-01), Cahill et al.
patent: 4618212 (1986-10-01), Ludington et al.
Hughes Richard P.
So Vincent C.
Vella Paul J.
Mowle John E.
Northern Telecom Limited
Sikes William L.
Wilkinson S. L.
Wise Robert E.
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