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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1989),
  • paper THKK1

Properties of Cr3+ in new fluoride host crystals

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Abstract

We recently discovered a new class of Cr3+ solid-state laser based on the fluoride host materials having the colquiriite structure LiCaAlF6 (Li- CAF)1 and LiSrAIF6 (LiSAF). We found that these materials exhibit efficient laser performance, as determined with a Kr laser-pumped experimental configuration. By taking the passive losses of the laser crystals into account, we find that the extrapolated slope efficiencies of Cr:LiCAF and Cr:LiSAF are 67 and 53%, respectively, while the quantum defect-limited efficiency is 80%. On the other hand, most other Cr lasers typically have efficiencies that are <30%.2 The question arises as to what favorable properties of these hosts are responsible for the efficient laser performance of Cr:LiCAF and Cr:LiSAF.

© 1989 Optical Society of America

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