Optical fiber coil and manufacturing method thereof

摘要

An optical fiber coil of the present invention includes an optical fiber (32)(in particular a dispersion compensating optical fiber), a storing case (80) which stores the coiled optical fiber (32) therein, and a filler (84) in the storing case (80). The filler (84) directly comes into contact with the glass portion (11) of the optical fiber (32) or contact with a thin film coating of not more than 1 mu m being formed on a surface of the glass portion (11) and having a hydrogen intrusion suppressing function. According to the optical fiber coil of the present invention, since the filler (84) directly comes into contact with the glass portion (11) of the optical fiber (32), the microbend loss can be further suppressed and the transmission can be stable.