Mode locked solid-state laser pumped by a non-diff

专利名称：Mode locked solid-state laser pumped by a

non-diffraction-limited pumping source andmethod for generating pulsed laser

radiation by pumping with a non-diffraction-limited pumping beam

发明人：Kurt Weingarten,Wolfgang Schusslbauer申请号：US09/066509申请日：19980424公开号：US05987049A公开日：19991116

摘要：A pulsed solid-state laser comprises an optical resonator and a solid- statelaser medium placed inside the optical resonator. A saturable absorber, such as a

semiconductor saturable absorber mirror device for passive mode locking is placed insidethe optical resonator, and a pumping source is provided for exciting the laser gainmedium to emit electromagnetic radiation. The pumping source emits pump radiationwhich impinges on the laser gain medium in the form of a non-diffraction- limited focusedpumping beam. The product of the stimulated emission cross section times thespontaneous fluorescence lifetime is low for the laser medium, e.g., 0.1·10.sup.-23cm.sup.2 s for Ti:sapphire; nevertheless, the laser yields a high output power of a fewWatt even if pumped with a non-diffraction-limited pumping beam. Pumping with a non-diffraction-limited pumping beam makes feasible solid-state lasers with remarkablysmaller sizes and lower costs, but with the same performance as known lasers.

申请人：TIME-BANDWIDTH PRODUCTS AG

代理人：Walter C. Farley

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