In a frequency-shifted, low gain pulsed tunable laser, spatial and temporal build-up of regions of high intensity in the fundamental frequency is minimized by generating a frequency-narrowed fundamental wavelength, preferentially frequency shifting high energy portions of the fundamental wavelength,...http://www.google.de/patents/US5257274?utm_source=gb-gplus-sharePatent US5257274 - High power laser employing fiber optic delivery means
