| 摘要 |
A laser light generating apparatus of the invention comprises an exciting light source (1) for generating a plurality of exciting laser beams, a laser medium (7) for generating at least two laser beams with radiation of the plurality of exciting laser beams at different positions thereof, reflecting means (8) for reflecting at least a part of the laser beams generated from the laser medium (7) and constructing a laser resonator (5) with thermal lenses (7a) through (7d) formed within the laser medium (7), and phase-compensating means (9) for compensating a phase of a laser beam from the laser resonator (5). Therefore, the laser generating apparatus becomes able to generate a laser beam whose energy is much concentrated within a small divergent angle. Furthermore, it becomes possible to control the laser beam in tracking by changing a phase-compensating amount of the phase-compensating means.
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