| 摘要 |
A laser light source (24) is disclosed that provides at least an ultraviolet laser beam and preferably both an ultraviolet laser beam and a visible laser beam. The laser light source (24) includes a semiconductor laser device (14) arranged to generate visible laser light at a wavelength » 1 and couple it into a single-crystal, thin-film, frequency-doubling waveguide structure (15, 3, 4), where a portion of the visible light is converted by second harmonic generation into ultraviolet light at a wavelength » 2 ; both visible and ultraviolet laser light are emitted from the waveguide structure. The waveguide structure comprises a thin-film, frequency-doubling region (15) made of a single crystal of a non-linear material and a first cladding region (3) placed between a supporting substrate (4) and the frequency-doubling region (15). The single crystal of non-linear material may be ²-BaB 2 O 4 (²-BBO), while the cladding region (3) is composed of materials that are transparent at the wavelength of the ultraviolet laser light beam. |
