Method of making optical fibers

Details Method of making optical fibers Method of making optical fibers

G - Physics

02

B

G02B 6/02 (2006.01) C03B 37/02 (2006.01) C03B 37/025 (2006.01) C03B 37/027 (2006.01)

Patent

CA 2326682

An optical fiber and method of making, wherein the optical fiber alternates between regions having different diameters along its length, wherein the refractive index of said blank and the diameters of said fiber are chosen to result in a fiber having alternating regions of positive and negative dispersion at a wavelength which is greater than 1480 nm, yet preferably has a low net dispersion and dispersion slope. A preferred such profile consists of a core region surrounded by a cladding region, said core region comprised of a central core region which is updoped with respect to said cladding region, said central core region surrounded by a moat region which is downdoped with respect to said cladding region, and said moat region is surrounded by an annular ring region which is updoped with respect to said cladding region.

L'invention concerne une fibre optique et un procédé de fabrication de celle-ci. Cette fibre présente des régions de diamètre différent alternées sur sa longueur. On choisit l'indice de réfraction de la préforme et les diamètres de la fibre de manière à obtenir une fibre présentant des sections à dispersion positive et négative à une longueur d'ondes supérieure à 1480 nm, mais dont la dispersion totale et la pente sont de préférence faibles. Une version préférée de ce type de profil comprend une région coeur entourée d'une région gaine. La région coeur est composée d'une région centrale dont le coefficient de dopage est plus élevé que celui de la gaine, ce coeur étant en outre entouré d'une région douve présentant un coefficient de dopage inférieur à celui de la gaine. La région douve est entourée d'une région annulaire présentant un coefficient de dopage supérieur à celui de la gaine.

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