Method and apparatus are provided for laser lithotripsy by subjecting calcified matter in the mammalian body, especially the human body, to two spatially and temporally overlapping pulsed laser light beams in the 300-450 and 600-900 nanometer wavelength range....http://www.google.se/patents/US5009658?utm_source=gb-gplus-sharePatent US5009658 - Dual frequency laser lithotripter
