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Laser, optical, and thermomechanical properties of Yb-doped fluorapatite

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6 Author(s)
Payne, S.A. ; Lawrence Livermore Nat. Lab., California Univ., CA, USA ; Smith, Larry K. ; DeLoach, Laura D. ; Kway, Wayne L.
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The laser performance of Yb-doped fluorapatite (Ca5(PO 4)3F or FAP), is assessed by employing a Ti:sapphire laser operating at 905 nm as the pump source. We have measured slope efficiencies to be as high as 79%; the residual decrement from the quantum defect-limited efficiency of 87% is accounted for by the presence of passive loss at the 1043-nm laser wavelength. The important spectral properties of Yb:FAP were evaluated, including the absorption and emission cross sections, excited-state lifetime, and ground-state energy-level splitting. The emission and absorption cross sections of Yb+3 in FAP are found to be substantially larger than those of other Yb-doped media. The thermal, physical, and optical properties of the FAP host are reported as well

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Quantum Electronics, IEEE Journal of  (Volume:30 ,  Issue: 1 )