OPTICAL FIBER FIXING MEMBER, METHOD OF MANUFACTURING THE OPTICAL FIBER FIXING MEMBER, OPTICAL FIBER ARRAY, AND METHOD OF MANUFACTURING THE OPTICAL FIBER ARRAY

An optical fiber fixing member having optical fiber engagement grooves (2) and crests (5) between the engagement grooves (2) is molded as one piece. A mold (21) pressurizes glass preform (G) so that the glass preform (G) will not completely be filled into recessed portions (25) of the mold (21) whic...

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Bibliographic Details
Main Authors ZHANG, LIHONG, YOKOO, YOSHIATSU, YAMASHITA, TERUO, YOSHIDA, MASAHIRO
Format Patent
LanguageEnglish
French
Japanese
Published 11.02.1999
Edition6
Subjects
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Summary:An optical fiber fixing member having optical fiber engagement grooves (2) and crests (5) between the engagement grooves (2) is molded as one piece. A mold (21) pressurizes glass preform (G) so that the glass preform (G) will not completely be filled into recessed portions (25) of the mold (21) which has raised portions (26) and recessed portions (25) for transfer-forming the engagement grooves (2) and crests (5). By transferring the shape of the raised portions (26) of the mold (21), the optical fiber engagement grooves (2) are formed, with their surfaces as a mold-transferred surface (6). Because the preform (G) is not filled completely into the recessed portions (26), the crests (5) of the optical fiber fixing member have round free surfaces (7), to which the shape of the recessed bottom portions (25a) of the mold (21) is not transferred. In the optical fiber fixing member molded by using a mold and heating the glass to high temperatures, it is possible to reduce transmission losses due to microcracks in the optical fibers and improve mold release and burr control. La présente invention concerne un élément monobloc moulé pour fixation de fibres optiques. Il est pourvu de rainures (2) et nervures (5) de retenue des fibres optiques. Un moule (21) pressurise une avant-forme de verre (G) de façon à ne pas la remplir complètement dans les zones surcreusées (25). Le moule (21) comporte en effet des zones surélevées (26) et des zones surcreusées (25) formant par transfert les rainures (2) et nervures (5) de retenue. Le transfert de forme des zones surélevées (26) du moule (21) donne forme aux rainures de retenue des fibres optiques, les surfaces considérées du moule se comportant comme des surface à transfert par moule (6). Etant donné que l'avant-forme (G) n'est pas complètement remplie dans les zones surcreusées (26), les nervures de l'élément de fixation de fibres optiques présentent des surfaces libres arrondies (7) contre lesquelles la forme des zones de fond surcreusées (25a) du moule (21) ne se transfèrent pas. Dans l'élément de fixation de fibre optique moulé en utilisant un moule et en chauffant le verre à des températures élevées, il est possible de réduire les pertes de transmissions imputables aux microfissures de la fibre optique et d'augmenter l'aptitude au démoulage et de limiter la formation de bavures.
Bibliography:Application Number: WO1998JP03426