| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser apparatus which emits an ultraviolet laser beam or both an ultraviolet laser beam and a visible laser beam. <P>SOLUTION: A laser apparatus includes a semiconductor laser device for generating visible laser light that reaches a frequency-doubling crystal in a single crystal thin film frequency-doubling waveguide structure. The single crystal thin film frequency-doubling waveguide converts a portion of the visible light emitted by the semiconductor laser into ultraviolet light. Both visible laser light and ultraviolet laser light are emitted from the frequency-doubling waveguide. For example, the single crystal thin film frequency-doubling waveguide includes a frequency-doubling crystal region composed of β-BaB<SB POS="POST">2</SB>O<SB POS="POST">4</SB>(β-BBO), a cladding region composed of a material which is transparent or almost transparent at the ultraviolet laser beam wavelength, and a supporting substrate composed of any materials. <P>COPYRIGHT: (C)2013,JPO&INPIT |
