| 摘要 |
A medical laser apparatus comprises: a solid laser oscillating source which emits a beam of a wavelength lambda1 in an infrared region of approx, 1040 nm to approx. 1080 nm; a first fiber-based Raman shifter including a first Raman fiber which generates, when receives the lambda1-beam from the laser oscillating source, a first-order Stokes beam of a wavelength lambda2 different from the wavelength lambda1 by stimulated Raman scattering, the first Raman fiber being formed with a pair of fiber Bragg gratings which forms a resonator for the lambda2-beam; a first nonlinear crystal which wavelength-converts the lambda2-beam outputted from the first Raman wavelength shifter to a second harmonic beam of a wavelength lambda2' in an orange region of approx. 580 nm to approx. 600 nm; and a light guiding optical system which guides the lambda2'-beam to a treatment part.
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