| 摘要 |
A medical laser apparatus for performing treatment by irradiating an affected part with a laser beam comprises: a fiber laser source with variable output power, which emits an infrared fundamental laser beam; a wavelength converting element which wavelength-converts the fundamental beam to a visible second harmonic laser beam and is placed on an optical axis of the fundamental beam; a first incident angle changing unit which changes an incident angle of the fundamental beam to the wavelength converting element; an optical axis deviation correcting unit which corrects deviation of an optical axis of the second harmonic beam caused by a change of the incident angle of the fundamental beam to the wavelength converting element; and a controller which controls the first changing unit and the correcting unit based on a change in power of the fundamental beam.
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