Patent
1990-02-14
1991-07-02
Lee, John D.
350 9615, G02B 602
Patent
active
050281186
ABSTRACT:
A device for the control and adjustment of the modal alignment of optical fibers is described. The device includes at least one laser (20) delivering an electromagnetic beam, and at least one mode selector (26) suitable for acting on the beam so as to produce a TEM1, j-1 type modal structure, the modal structure having an axis of symmetry (15). Also included in the device are a marker for marking at this axis of symmetry (15) orientation variations around an axis (RR1); an introducer for introducing the electromagnetic beam into an optical fiber (10); and a measurer (36) for measuring luminous power. The device is particularly adapted for the adjustment of the alignment of optical fibers as regards their connection and for centering an optical fiber in a plug connector.
REFERENCES:
patent: 4797893 (1989-01-01), Dixon
Millar et al.; "Cladding Alignment of Butted Optical Fibers Using a Diffraction Alignment Device (DAD and its Application to Mode-Spot Concentricity-Error Measurement"; Journal of Lightwave Technology, vol. LT-3, No. 4 Aug. 1985, pp. 868-874.
Facq et al., "Tunable Single-Mode Excitation in Multimode Fibers"; Electronics Letters, vol. 20, No. 15, Jul. 19, 1984; pp. 613-614.
Blondy Jean-Marc
Facq Paul
Fressy Gilles
Pagnoux Dominique
Seignole Jean-Francois
Centre National d'Etudes des Telecommunications
Lee John D.
Ngo John
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