MULTI-CORE FIBER FOR OPTICAL PUMPING DEVICE AND MANUFACTURING METHOD THEREOF, OPTICAL PUMPING DEVICE, FIBER LASER AND FIBER AMPLIFIER

摘要

A multi-core fiber for an optical pumping device obtained by inserting a plurality of optical fibers into an alignment member and integrating by heating, in which the alignment member is constituted with a material that has a lower softening temperature than the softening temperature of the optical fibers that are inserted into holes provided in the alignment member. According to the present invention, it is possible to provide a low-cost and high-performance multi-core fiber for an optical pumping device with little deformation of the optical fibers when fusion integrating the alignment member and the optical fibers.