POLARIZATION MAINTAINING FIBER, POLARIZATION MAINTAINING FIBER LASER, PASSIVE MODE-LOCKING FIBER LASER, FIBER AMPLIFIER AND OPTICAL FIBER

摘要

PROBLEM TO BE SOLVED: To provide a fiber in which amount of polarization mode coupling and polarization mode dispersion are reduced and in which polarization maintaining capacity is increased, and to provide a high efficient fiber amplifier or laser with a polarization maintaining large outer-diameter such that pump light is guided inside a cladding while a large outer cladding ensures decrease in mode-coupling inside the fiber core.;SOLUTION: The polarization maintaining fiber includes a fiber core, a first cladding surrounding this core, a coating surrounding this first cladding, and a means for minimizing polarization mode-coupling that couples with a fiber having a minimum fiber outer diameter 125 m.;COPYRIGHT: (C)2008,JPO&INPIT