G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/36 (2006.01) G02B 6/26 (2006.01) G02B 6/38 (2006.01)
Patent
CA 2272515
An optical adapter [100] includes a pair of cylindrical ferrules [121, 122], each containing an optical fiber disposed along its central axis [101-101]. The ferrules are aligned with their central axes being collinear. Moreover, the ferrules are captured within a plastic housing that comprises a plug member [110] and a jack member [140]. These members interlock with each other to form an adapter that can be used, for example, for attenuating an optical signal or for interconnecting two ferrules having different diameters. Preferably, the ferrules are identical to each other. Each ferrule includes an optical fiber that is disposed in a bore, which extends along the central axis of the female between its opposite ends, and each ferrule has an end face [126] that is angled at about 82 degrees with respect to the central axis. In one embodiment, the angled end faces of the ferrules are in direct contact with each other and attenuation is determined by the optical path length between the centers of the angled end faces, which is a function of the axial rotation of the ferrules with respect to each other. In another embodiment, the angled end faces of the ferrules are in contact with opposite sides of a spacer [170] so that attenuation is a function of the spacer's thickness and the axial rotation of the ferrules with respect to each other. Such a design enables precision optical attenuators to be fabricated. Wavelength division multiplexing systems are improved by the use of such precision optical attenuators at the inputs of the multiplexer [200] and/or the outputs of the demultiplexer [500].
Deveau Mark G.
Lampert Norman Roger
Kirby Eades Gale Baker
Lucent Technologies Inc.
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