Method of manufacturing an optical fibre suitable for high transmission rates
AssigneeDraka Fibre Technology B.V.
InventorsEric Aloysius Kuijpers, Peter Johannes Theodorus Pleunis
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Abstract
The present invention relates to a method of manufacturing an optical fibre suitable for high transmission rates, which method comprises: i) supplying one or more glass forming precursors, and possibly a dopant, to a quartz substrate tube, ii) forming a plasma in the quartz substrate tube for the purpose of bringing about a reaction mixture so as to form glass layers, which may or may not be doped, on the interior of the substrate tube, iii) collapsing the substrate tube obtained in step ii) into a perform while heating, and iv) drawing an optical fibre from the perform while heating. The present invention furthermore relates to an optical fibre suitable for high transmission rates.
Claims14
A method of manufacturing a multimode optical fibre suitable for transmission rates equal to or higher than 1 Gigabit/sec, of the method comprising:
- i) supplying one or more glass forming precursors, and possibly a dopant, to a quartz substrate tube;
- ii) forming a plasma in the quartz substrate tube for the purpose of bringing about a reaction in a reactive mixture so as to form glass layers, which may or may not be doped, on an interior of the substrate tube;
- iii) collapsing the substrate tube obtained in ii) into a perform while heating;
- and
- iv) drawing an optical fibre from the perform while heating, wherein:
- the glass layers, which may or may not be doped, are deposited on the interior of the substrate tube in such a manner that separate layers according to ii) are formed in a region having a diameter of 10 μm at most in a center of an optical fibre that is finally drawn, wherein at least one of said separate layers has a surface area of 2 μm2 at most, wherein a refractive index value in the fibre that is finally drawn increases in a direction of the center thereof.
A method to manufacture a multimode optical fibre suitable for transmission rates equal to or higher than 1 Gigabit/sec, the method comprising:
- i) supplying one or more glass forming precursors, and possibly a dopant, to a quartz substrate tube;
- ii) forming a plasma in the quartz substrate tube to bring about a reaction so as to form glass layers, which may or may not be doped, on an interior of the substrate tube;
- iii) collapsing the substrate tube obtained in ii) into a preform while heating,
- iv) drawing an optical fibre from the preform while heating, wherein:
- the glass layers, which may or may not be doped, are deposited on the interior of the substrate tube in such a manner that separate layers are obtained after iii) and iv) in a region adjacent to a center of an optical fibre that is finally drawn, wherein at least one of said separate layers has a surface area of 2 μm2 at most, wherein a refractive index value in the fibre that is finally drawn increases in a direction of the center thereof, wherein the separate layers in the region of the optical fibre have mutually different refractive index values.
Dependencies are inferred from the claim text.