Single crystals of neodymium-doped barium chloroapatite have been grown by the Czochralski technique and evaluated as a laser medium. Among known Nd-doped apatites, the material studied is characterized by the longest luminescence lifetime, τ=0.375 ms, and one of the largest emission cross sections, σ=6×10<sup>−19</sup> cm<sup>2</sup>. The product στ in this crystal, which is equal to 2.3×10<sup>−22</sup> cm<sup>2</sup> s, is apparently the largest of those of all Nd-doped laser crystals. Laser operation at 1053.8 nm with a slope efficiency of 25% and an intrinsic slope efficiency of 49% was obtained.
© 2000 Optical Society of America
(140.3380) Lasers and laser optics : Laser materials
(160.3380) Materials : Laser materials
(160.4760) Materials : Optical properties
(160.5690) Materials : Rare-earth-doped materials
(260.2510) Physical optics : Fluorescence
M. A. Noginov, G. B. Loutts, C. E. Bonner, S. Taylor, S. Stefanos, R. M. Wynne, and B. A. Lasley, "Crystal growth and characterization of a new laser material, Nd:Ba5(PO4)3Cl," J. Opt. Soc. Am. B 17, 1329-1334 (2000)