LASER DEVICE

摘要

PROBLEM TO BE SOLVED: To enable further reduction of loss of a reflection means as a laser resonator in a laser device having a laser medium and the reflection means. SOLUTION: A reflection means 21 includes first and second (s) polarization mirrors 21a and 21c and first and second plane mirrors 21b and 21d. The first (s) polarization mirror 21a is arranged opposed to a first end face 11a of a laser medium so that a first beam emitted from the first end face is directed to the mirror 21a at an incident angle of at least 30 degrees. The first plane mirror 21b is arranged opposed to the first mirror 21a so that a part of the first beam reflected by the mirror 21a is directed vertically to the mirror 21b. The second polarization mirror 21c is arranged opposed to a second end face 11b of the laser medium so that a second beam emitted from the second end of the laser medium is directed to the mirror 21c at an incident angle of at least 30 degrees. The second plane mirror 21d is arranged opposed to the second mirror 21c so that a part of the second beam reflected by the second mirror 21c is directed vertically to the mirror 21d.