Optical fiber connector and ferrule used for it and...

G - Physics – 02 – B

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G02B 6/36 (2006.01) C25D 1/02 (2006.01) G02B 6/38 (2006.01)

Patent

CA 2351326

Electroforming is performed in an electroforming bath with a cathode of a metal wire member immersed in an electroforming solution to electrodeposit nickel around the aluminum alloy wire member. The aluminum alloy wire member is removed by dissolution with an alkaline solution from an obtained nickel electroformed product. Accordingly, a nickel cylinder is obtained, which has a through-hole formed corresponding to the wire member. The cylinder is cut into those having a predetermined length. The outer circumference is subjected to cutting based on the through-hole to obtain a ferrule. The inner diameter accuracy of the through-hole of the ferrule is determined by the outer diameter accuracy of the wire member. Therefore, it is unnecessary to perform polishing for the through-hole. The highly accurate ferrule is obtained in accordance with the simple process at low cost. The PC polishing for the ferrule for effecting PC junction of optical fibers is extremely easy, because the ferrule is made of metal. Thus, it is possible to provide a high performance optical fiber connector.

On dépose par galvanoplastie du nickel autour d'un fil en alliage d'aluminium (9) par électromoulage dans un bain d'électrofusion (50) en plongeant ledit fil métallique (9), qui sert de cathode, dans une solution d'électromoulage (3). Pour obtenir un cylindre de nickel présentant un trou traversant qui correspond au fil (9), on élue le fil d'alliage d'aluminium (9) du dépôt galvanique au moyen d'une solution alcaline. Pour obtenir la ferrule, on coupe le cylindre à une longueur prédéterminée et on découpe la périphérie externe en prenant le trou traversant comme référence. Comme la précision du diamètre interne du trou traversant est déterminée par la précision du diamètre externe du fil (9), il n'est pas nécessaire de polir ledit trou, ce qui permet d'obtenir une ferrule de haute précision par un procédé simple et peu coûteux. La ferrule étant métallique, le polissage physicochimique d'une ferrule destinée à la connexion d'une fibre optique est très facile et permet donc d'obtenir un connecteur optique à performances élevées.

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