| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser apparatus which is inexpensive and in which a wavelength management is easy with a high power. SOLUTION: The light emitted from the emitting surface 102 of the light generated by the optical amplifying medium 103 of each optical amplifying part 10<SB>n</SB>is condensed by a joint lens 20<SB>n</SB>, and is incident on the incident/emitting end 311<SB>n</SB>of an optical coupling part 31. The light incident on the incident/emitting end 311<SB>n</SB>is outputted from the common incident/emitting end 312 of the optical coupling part 31 through optical couplers 313<SB>1</SB>-313<SB>7</SB>, and is incident on a diffraction grating part 40. The part of the light of the specific wavelength of the light incident on the diffraction grating part 40 is reflected alternatively by this diffraction grating part 40, returned to the optical amplifying medium 103 of each optical amplifying part 10<SB>n</SB>through an optical path reverse to an optical path so far, and reflected by the reflecting surface 211 of the optical amplifying part 10<SB>n</SB>. A laser resonator constituted between the reflecting surfaces 101 of the optical amplifiers 20<SB>1</SB>-20<SB>8</SB>and the diffraction grating part 40 performs a laser oscillation. COPYRIGHT: (C)2005,JPO&NCIPI
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