Treatment of covered optical fiber

Abstract

Abstract PURPOSE:To obtain covered optical fiber having reliability for a long period, by subjecting covered optical fiber coated with a silicone resin to contact reaction with a specific compound. CONSTITUTION:The outer periphery of the optical fiber 11 consisting of core and clad obtained by spinning preform rod prepared by MCVD method, VAD method, etc. is covered with the thermosetting or ultraviolet-curing silicone resin 12 to give the covered optical fiber 10. The fiber 10 is put in a reactor having a low-molecular-weight organic compound (e.g., ethylene) containing a double or triple bond having reactivity with a group shown by the formula, it is subjected to contact reaction at 1-10 atmospheric pressure at <=200 deg.C, so that the outer periphery of the resin 12 is coated with a thermoplastic resin. Consequently, optical fiber not increasing transmission loss even if it is kept at high temperature for a long time is prepared.

Inventors

• 👤 Naoyuki Wada
• 👤 和田　直行
• 👤 Masao Nishimura
• 👤 西村　真雄
• 👤 Kazuaki Yoshida
• 👤 和昭 吉田
• 👤 Katsumi Orimo
• 👤 折茂　勝巳
• 👤 Takao Kimura
• 👤 隆男 木村
• 👤 Motohiro Nakahara
• 👤 基博 中原
• 👤 Nobuo Inagaki
• 👤 稲垣　伸夫

Bibliographic Details