| 简介 |
PROBLEM TO BE SOLVED : To reduce damage to a dielectric multi-layered film constituting a laser resonator.
SOLUTION : A fiber laser device A includes a double clad fiber 11 having a rare earth element doped core, a first clad provided outside the core and a second clad provided outside the first clad, and has : a fiber laser body 10 with the dielectric multi-layered film, whose one end constitutes a beam outgoing end and other end constitutes the resonator; and an excitation light source 20 provided on the one end side of the fiber laser body 10.
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