| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive laser apparatus which is manufactured easily 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 amplifier 10<SB>n</SB>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 is selectively reflected by this diffraction grating part 40, returned to the optical amplifying medium 103 of each optical amplifier 10n through an optical path reverse to an optical path so far, and reflected by the reflecting surface 211 of the optical amplifier 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. An optical waveguide in each incident/emitting end 311<SB>n</SB>of the optical coupling part 31 is a multi-mode, and an optical waveguide in the diffraction grating part 40 is a single mode. COPYRIGHT: (C)2005,JPO&NCIPI
|
