ULTRAVIOLET LASER DEVICE

摘要

An ultraviolet laser device includes a visible laser oscillating section (laser 1) for generating a visible laser of a variable wavelength, a laser (laser 2) for generating a laser beam of a constant wavelength, and a wavelength converting section (conversion section 1) for generating a sum-frequency wave from the output light (output light a1) of the laser 1 and the output light (output light b) of the laser 2 and thereby producing an ultraviolet light.  The laser device is characterized in that the laser 1 includes an optical waveguide which has a core containing at least Pr as a laser medium and a semiconductor laser generating an excited light having a wavelength of larger than 400 nm and shorter than 480 nm as a pumping light source and ultraviolet light (output light c) having a wavelength of shorter than 250 nm is continuously outputted by using a ferroelectric fluoride crystal in the conversion section (1).