Title :
Laser, optical, and thermomechanical properties of Yb-doped fluorapatite
Author :
Payne, Stephen A. ; Smith, Larry K. ; DeLoach, Laura D. ; Kway, Wayne L. ; Tassano, John B. ; Krupke, William F.
Author_Institution :
Lawrence Livermore Nat. Lab., California Univ., CA, USA
fDate :
1/1/1994 12:00:00 AM
Abstract :
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
Keywords :
calcium compounds; impurity and defect absorption spectra of inorganic solids; infrared spectra of inorganic solids; luminescence of inorganic solids; optical losses; optical pumping; photoluminescence; radiative lifetimes; solid lasers; ytterbium; 1043 nm; 1043-nm laser wavelength; 79 to 87 percent; 905 nm; Al2O3:Ti; Ca5(PO4)3F; Ca5(PO4)3F:Yb; FAP; Ti:sapphire laser; Yb-doped fluorapatite; Yb:FAP; absorption cross section; emission cross sections; excited-state lifetime; ground-state energy-level splitting; laser performance; optical properties; passive loss; physical properties; pump source; quantum defect-limited efficiency; spectral properties; thermal properties; thermomechanical properties; Absorption; Diodes; Financial advantage program; Indium gallium arsenide; Laser excitation; Laser transitions; Optical pumping; Pump lasers; Temperature; Thermomechanical processes;
Journal_Title :
Quantum Electronics, IEEE Journal of
