Laser and spectroscopic properties of Sr 5 (PO 4 ) 3 F:Yb

Sr5(PO4)3F (S-FAP) has been investigated as a new Yb-doped laser crystal belonging to the apatite structural family. The spectroscopy of the Yb3+ ion and the laser properties of the medium have been investigated. The maximum absorption cross section of Yb in S-FAP is 8.6 × 10−20 cm2, and the maximum emission cross section is 7.3 × 10−20 cm2. The measured emission lifetime of Yb3+ is 1.26 ms. An Yb:S-FAP laser has been demonstrated with a Ti:sapphire laser pump operating at 899 nm. The Yb:S-FAP laser was measured to have slope efficiencies as high as 71%. The spectroscopy and laser studies are reported, as well as certain thermal, mechanical, and optical properties.

[1]  William F. Krupke,et al.  Laser, optical, and thermomechanical properties of Yb-doped fluorapatite , 1994 .

[2]  A. Cockbain.  The Crystal Chemistry of the Apatites , 1968 .

[3]  P. Moulton.  Spectroscopic and laser characteristics of Ti:Al2O3 , 1986 .

[4]  Lloyd L. Chase,et al.  Evaluation of absorption and emission properties of Yb/sup 3+/ doped crystals for laser applications , 1993 .

[5]  John A. Caird,et al.  Spectroscopic, optical, and thermomechanical properties of neodymium- and chromium-doped gadolinium scandium gallium garnet , 1986 .

[6]  W. C. Holton,et al.  GaAs: Si LED Pumped Yb‐Doped YAG Laser , 1971 .

[7]  R. Hopkins,et al.  Czochralski-growth of calcium fluorophosphate , 1968 .

[8]  M. Ettenberg,et al.  Low degradation rate in strained InGaAs/AlGaAs single quantum well lasers , 1990, IEEE Photonics Technology Letters.

[9]  Lloyd L. Chase,et al.  Ground-state depleted solid-state lasers: principles, characteristics and scaling , 1990 .

[10]  R. Hopkins,et al.  The Origin of Secondary Phases in Melt‐Grown Fluorapatite Crystals , 1969 .

[11]  N. Melamed,et al.  Laser properties of nd(+3) and ho(+3) doped crystals with the apatite structure. , 1972, Applied optics.

[12]  B. Woods,et al.  Thermomechanical and thermo-optical properties of the LiCaAlF 6 :Cr 3+ laser material , 1991 .

[13]  F. A. Hummel,et al.  The crystal chemistry of apatite: structure fields of fluor- and chlorapatite , 1970 .

[14]  M. Walker,et al.  Thermal Properties of Synthetic Fluorapatite Crystals , 1971 .

[15]  R. Mazelsky,et al.  Crystal Growth of a New Laser Material, Fluorapatite , 1968 .

[16]  Leroy W. Tilton,et al.  Testing and Accurate Use of Abbe-Type Refractometers , 1942 .

[17]  R. M. Kolbas,et al.  Strained-layer InGaAs-GaAs-AlGaAs photopumped and current injection lasers , 1988 .

[18]  P. D. Johnson.  Some Optical Properties of Powder and Crystal Halophosphate Phosphors , 1961 .

[19]  T. Fan,et al.  Room-temperature diode-pumped Yb:YAG laser. , 1991, Optics letters.