Diauxic growth and microstructure of grain interfaces in thermal bonding Yb:LuAG/LuAG ceramic

Transparent composite Lutetium aluminum garnet (LuAG) ceramics were successfully synthesized by thermal diffusion bonding method. Three isothermal holding temperature of 1450°C, 1600°C, 1780°C for 10h under vacuum were used to study the changes of bonding interface morphology, Optical microscope, SEM and laser interferometer (GPI-XP,zygo) study show that diauxic growth of grain interface appears when the thermal bonding holding temperature increased. The sintering mechanism of diauxic growth of grain interface during the thermal diffusion bonding was also discussed using diffusion theory. The diauxic growth of grain interface provides us the possibility to get high quality composite laser ceramics as we designed.

[1]  B. Neuenschwander,et al.  Thermal effects in solid-state laser materials , 1999 .

[2]  Akio Ikesue,et al.  Fabrication and Optical Properties of High‐Performance Polycrystalline Nd:YAG Ceramics for Solid‐State Lasers. , 1995 .

[3]  A. Ikesue,et al.  Efficient sensitization of Yb3+ emission by Nd3+ in Y2O3 transparent ceramics and the prospect for high-energy Yb lasers. , 2009, Optics letters.

[4]  Akio Ikesue,et al.  Optical Scattering Centers in Polycrystalline Nd:YAG Laser , 2005 .

[5]  S. Wada,et al.  Highly doped Nd : YAG crystal used for microchip lasers , 2001 .

[6]  W. Marsden.  I and J , 2012 .

[7]  Andrew G. Glen,et al.  APPL , 2001 .

[8]  A. Mandl,et al.  Textron's J-HPSSL 100 kW ThinZag® laser program , 2010, CLEO/QELS: 2010 Laser Science to Photonic Applications.

[9]  Akio Ikesue,et al.  Effects of Neodymium Concentration on Optical Characteristics of Polycrystalline Nd:YAG Laser Materials , 1996 .

[10]  Akio Ikesue,et al.  Influence of pore volume on laser performance of Nd : YAG ceramics , 1999 .

[11]  Yan Lin Aung,et al.  Ceramic laser materials , 2008 .

[12]  John Vetrovec,et al.  Progress in the development of solid state disk laser , 2004, SPIE LASE.

[13]  Ian J. Spalding,et al.  Laser physics , 1977, Nature.

[14]  Akihiko Nishimura,et al.  Feasibility study of a direct bonding technique for laser crystals , 2000, International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT).

[15]  F. Hanson,et al.  Improved laser performance at 946 and 473 nm from a composite Nd:Y3Al5O12 rod , 1995 .

[16]  Hagop Injeyan,et al.  Joint high power solid state laser program advancements at Northrop Grumman , 2009, LASE.