C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 37/027 (2006.01) C03B 37/012 (2006.01) C03B 37/014 (2006.01) C03B 37/018 (2006.01) G02B 6/02 (2006.01)
Patent
CA 2371250
A method of fabricating an optical waveguide fiber that includes the steps of providing a cylindrical glass optical fiber preform having a longitudinally extending centerline hole, and closing the hole under conditions suitable to result in uniform and symmetric hole closure. The method may include first plugging a first end and a second end of the centerline hole to prevent gas flow therethrough. The method preferably involves closing the centerline hole of the preform by drawing the preform down into an optical waveguide fiber. An optical fiber produced by the method has a polarization mode dispersion (PMD) of <0.2 ps km-2.
La présente invention concerne un procédé de fabrication de fibre guide d'onde optique qui consiste à obtenir une préforme cylindrique en verre, de fibre optique, dotée d'un trou s'étendant longitudinalement selon l'axe central, et à fermer le trou dans des conditions permettant l'obtention d'une fermeture uniforme et symétrique. Le procédé peut comprendre d'abord la fermeture d'une première extrémité, puis celle d'une seconde extrémité du trou selon l'axe central afin d'y empêcher un écoulement de gaz. Le procédé met avantageusement en oeuvre la fermeture du trou selon l'axe central par étirage de la préforme en une fibre guide d'onde optique.
Allen Martin W.
Bookbinder Dana C.
Chowdhury Dipakbin Q.
Hawtof Daniel W.
Powers Dale R.
Corning Incorporated
Gowling Lafleur Henderson Llp
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