The system of claim 1 in which the source of coherent radiation is a ruby laser.ĥ. The system of claim 2 in which the doubling means is a frequency doubler.Ĥ. The system of claim 1 in which the source of coherent radiation is an alexandrite laser.ģ. (c) beam delivery means for directing at least one of the respectively selected said beams of coherent radiation onto a target.Ģ. (b) means for selectively doubling the wavelength of the beam of coherent radiation from said single source to a second wavelength beam of coherent radiation, said second wavelength being in the range of 250-400 nm such that the beam is effective for cutting tissue by photoablation with little light penetration or scattering and consequently little lateral spread of heat damage and (a) a single source of a beam of coherent radiation having a first wavelength, which wavelength is such that a beam of coherent radiation from said single source is effective for cauterizing bleeding blood vessels through photocoagulation, and said single source being selected from the group of lasers having a fundamental wavelength of 500-800 nm. A dual-wavelength laser system for both cutting and coagulating tissue, comprising, in combination:
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