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High efficiency 2 micrometer laser utilizing wing-pumped Tm.sup.3+ and a laser diode array end-pumping architecture

  • US 5,689,522 A
  • Filed: 10/02/1995
  • Issued: 11/18/1997
  • Est. Priority Date: 10/02/1995
  • Status: Expired due to Term
First Claim
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1. An apparatus, comprising:

  • a laser crystal doped with Tm3+ ions and having an end pump face coated to transmit light within a first range of about 755 nm to about 815 nm, said laser crystal comprising an output face, wherein said end pump face is coated to reflect light at about 2 micrometers; and

    means for end pumping said laser crystal at a wavelength located on the wings of its main absorption feature, wherein said main absorption feature is located at approximately 785 nm, wherein said wings are located within a second range and a third range, wherein said second range is from about 755 nm to about 775 nm and wherein said third range is from about 790 nm to about 815 nm, wherein said Tm3+ ions produce laser light when said laser crystal doped with Tm3+ ions is end pumped at said wavelength located on said wings of said main absorption feature of said laser crystal, wherein said laser crystal is operable at high average power.

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