Fabrication of microlensed fiber using doped silicon dioxide

G - Physics – 02 – B

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G02B 6/32 (2006.01) G02B 6/26 (2006.01)

Patent

CA 2451653

A method of making a microlensed fiber (1) by splicing a doped silica rod to an optical fiber (3) and shaping the end of the doped silica rod into a plano- convex refracting lens (2). The doped silica rod has a lower melting point and annealing point than undoped silica, and therefor less power is required to manufacture the microlensed fiber (1). This decreases wear to the heating elements of the manufacturing equipment and therefor increases the number of microlensed fibers that can be manufactured between cycles. A further aspect of the present invention is a microlensed fiber (1) made by the above process.

Procédé de fabrication d'une fibre à micro-lentilles (1) par l'épissage d'une tige en silicium dopé visant à obtenir une fibre optique (3) puis à former l'extrémité de la tige en silicium dopé de manière à obtenir une lentille de réfraction plan-convexe (2). La tige en silicium dopé a un point de recuit et un point de fusion plus bas que le silicium non dopé; de ce fait, on a besoin de moins d'énergie pour fabriquer la fibre à micro-lentilles (1). Cela diminue l'usure des éléments chauffants de l'équipement de fabrication et augmente par conséquent le nombre de fibres à micro-lentilles qui peuvent être fabriqués entre les cycles. Un autre aspect de la présente invention est une fibre à micro-lentilles (1) fabriquée par le procédé ci-décrit.

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