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Mode locked solid-state laser pumped by a non-diffraction-limited pumping source and method for generating pulsed laser radiation by pumping with a non-diffraction-limited pumping beam

  • US 5,987,049 A
  • Filed: 04/24/1998
  • Issued: 11/16/1999
  • Est. Priority Date: 04/24/1998
  • Status: Expired due to Term
First Claim
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1. A laser for emitting pulsed electromagnetic radiation, said laser comprising:

  • an optical resonator;

    a solid-state laser gain medium placed inside said optical resonator, said laser gain medium having a defined stimulated emission cross section and a defined spontaneous fluorescence lifetime for a given optical wavelength;

    means for passive mode locking placed inside said optical resonator; and

    means for exciting said laser gain medium to emit electromagnetic radiation, said exciting means comprising a pumping source for emitting pumping radiation which impinges on said laser gain medium in the form of at least one non-diffraction-limited focused pumping beam with essentially one pumping wavelength;

    the product of said cross-section and said fluorescence lifetime being equal to or smaller than 0.15·

    10-23 cm2 s.

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