Patent
1987-10-08
1989-02-07
Lee, John D.
350320, G02B 636
Patent
active
048027260
ABSTRACT:
A biconic connector includes two plugs (44--44) each terminating a single fiber optical cable (55) and each including a conically shaped end portion (50). In order to minimize loss through a connection, the axis of an end portion of the optical fiber in the conically shaped end portion of the plug should be substantially coincident with the axis of revolution of the conically shaped end portion. This is accomplished by holding the plug in a fixture such that its conically shaped end portion is exposed and the fixture adapted to be turned about an axis of rotation (105). Scattered light from a laser (166) directed toward a gauging length (100) of optical fiber in a passageway of the plug and extending beyond an end face thereof as the plug is turned rotatably is received on a target area. The fixture is turned pivotally to cause the axis of the gauging fiber to parallel the axis of rotation. Images of light are launched toward the optical fiber tranversely of its longitudinal axis at a plurality of positions spaced apart circumferentially through a known angle. The axis of rotation and the eccentricity of a centroid of the gauging fiber are determined from these images. Adjustments are then made to cause the centroid of the fiber to be coincident with the axis of rotation. Subsequently, the plug end portion is reconfigured to cause the axis of revolution and a portion of the axis of the gauging fiber to be substantially coincident.
REFERENCES:
patent: 4512630 (1985-04-01), Runge
patent: 4673245 (1987-06-01), Kling et al.
patent: 4721357 (1988-01-01), Kovalchick et al.
N. K. Chueng et al., "An Automatic Inspection System For Single Fiber Contor Plugs", Technical Digest-Symposium On Optical Fiber Measurements, 1980.
W. C. Young, L. Curtis, P. Kaiser, "Biconic Single-mode Connectors With Insertion Losses Below 0.3dB", OFC '82.
W. C. Young et al., "Low-loss Field-installable Biconic Connectors For Single-mode Fibers", OFC, New Orleans, 1983.
Palmquist John M.
Saunders Morton J.
American Telephone and Telegraph Company, AT&T Technologies, Inc
Heartney Phan
Lee John D.
Somers Edward W.
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