Dual wavelength laser system with intracavity sum frequency mixing

A dual-wavelength infrared laser system with intracavity, sum-frequency mixing for yellow light generation for vascular lesion removal, comprising:

• a bifurcated resonant cavity having a first arm, a second arm and a common arm;
• a first solid state H2 pfm infrared laser element located in said first arm for producing a first laser beam at approximately 1 micron;
• a second solid state H2 pfm infrared laser element located in said second arm for producing a second input laser beam at approximately 1.3 microns;
• a nonlinear-mixing element in said common arm;
• and
• a beam combining device for combining said first and second beams and submitting them to said nonlinear-mixing element for producing an output laser beam of a yellow wavelength whose energy is the sum of the energy of the input laser beams.