Optical fibre having low splice loss and method for making it

Details Optical fibre having low splice loss and method for making it Optical fibre having low splice loss and method for making it

G - Physics

02

B

G02B 6/255 (2006.01) C03B 37/025 (2006.01) C03B 37/027 (2006.01)

Patent

CA 2509263

The invention relates to a process for making a non-zero dispersion shifted optical fibre having low splice loss and low attenuation and to and to an optical fibre produced by this process. A reduction of the splice loss is observed with decreasing the drawing tension. The optical fibre comprises a core region that includes three segments and a inner cladding segment, each having a maximum refractive index percent difference, .DELTA.delta/%, i=0-3, the subscript / referring to a particular, the core segments being selected such that .DELTA.delta0% > .DELTA.delta2% > .DELTA.delta1% >= 0 and .DELTA.delta2% > .DELTA.delta3% >= 0. Optical fibres exhibiting low splice loss were draw at tensions not larger than 150 g, preferably not larger than 100 g.

L'invention concerne un procédé de production d'une fibre optique à dispersion décalée non nulle ayant une faible perte d'épissure et une faible atténuation ainsi qu'une fibre optique produite selon ce procédé. Une réduction de la perte d'épissure est observée avec la diminution de la tension d'étirage. La fibre optique comprend une région de coeur comprenant trois segments et un segment de gaine intérieur, chacun présentant une différence en pourcentage d'indice de réfraction maximum, .DELTA.¿<i>i</i> ?% i=0-3, l'indice <i>i </i>se référant à un segment particulier, les segments de coeur étant sélectionnés de telle sorte que .DELTA.¿<i>0</i> ?% > .DELTA.¿<i>2</i> ?% > .DELTA.¿<i>1</i>?% >= 0 et .DELTA.¿<i>2</i> ?% > .DELTA.¿<i>3</i> ?% >= 0. Des fibres optiques présentant une faible perte d'épissure ont été étirées à des tensions non supérieures à 150 g, de préférence non supérieures à 100 g.

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