Patent ID: 7346084

Claim:
A device for generating a lossless pulse ultraviolet laser beam comprising: a pulse ytterbium fiber laser for emitting a laser beam in a pulse form; a laser window for transmitting part of the laser beam emitted from the pulse ytterbium fiber laser and reflecting the rest of the laser beam; a beam expander for reducing a diameter of the laser beam having a first wavelength passing through the laser window to increase a power density of the laser beam; a nonlinear harmonic SHG (second harmonic generation) LBO crystal for modulating the laser beam passing through the beam expander from the first wavelength to a second wavelength; a lens for focusing the laser beam having the second wavelength passing through the nonlinear harmonic crystal; a nonlinear harmonic THG (third harmonic generation) LBO crystal for modulating the laser beam from the second wavelength to a third wavelength; a combination wave splitter for reflecting the laser beam having the third wavelength that is in an ultraviolet range of the laser beam passing through the nonlinear harmonic crystal and transmitting the laser beams having the first and second wavelengths; a reflecting mirror for reflecting the third wavelength laser beam reflected by the combination wave splitter; reflecting mirrors for reflecting the laser beam having the first and second wavelengths transmitted by the combination wave splitter to a fiber cable; fiber cable sets for transferring the reflected laser beams having the first and second wavelengths; reflecting mirrors for transmitting the laser beam having the first wavelength from the fiber cable sets and reflecting the laser beam having the second wavelength to the beam expander; a reflecting mirror for reflecting the laser beam having the first wavelength transmitted by the reflecting mirror to the window laser; and reflecting mirrors for reflecting part of the laser beam transmitted by the laser window to the fiber cable set.