Patent attributes
A medical laser apparatus for irradiating an affected tissue with a laser beam to treat the affected tissue, comprises: a laser source unit which emits an infrared beam as a fundamental wave having a spectral bandwidth; a wavelength demultiplexing optical system which spatially demultiplexes the emitted infrared beam by wavelengths; a wavelength converting optical system including a wavelength converting element disposed in correspondence with an optical path position of each of the demultiplexed infrared beams and for converting each of the infrared beams to a visible beam as a second harmonic wave; a wavelength multiplexing optical system which multiplexes the visible beams obtained by the conversion; and a delivery optical system which guides the multiplexed visible beams to the affected tissue.