(a) SEM picture of a Nd:YAG fine grain ceramic after chemical etching. (b) Grain size distribution obtained from (a).
Normalized thermal lens signal for doped Nd:YAG single crystal and ceramic at (a) and (b) . The solid lines correspond to adjustments using the TL equation, from which were obtained (a) , and (b) , .
Thermal diffusivity as a function of the sample temperature for Nd:YAG single crystal (with ) and ceramics (with 1.0, 2.0, and ).
Thermal diffusivity as a function of the Nd ions concentration for Nd:YAG ceramics. Result is presented for doped Nd:YAG single crystal. Results obtained at room temperature.
Log-log dependence of the thermal diffusivity vs temperature for Nd:YAG samples.
Thermal lens phase shift normalized by the absorbed pump power as a function of sample temperature for Nd:YAG samples.
Experimental temperature dependence of the product between the fractional thermal loading and the sample’s characteristic response function (characteristic optical path changes with deposited heat, ).
Characteristic optical path changes with deposited heat as a function of temperature for doped Nd:YAG single crystal and ceramic.
Schematic drawing of the possible phonon-lattice scattering mechanisms that could take place in Nd:YAG crystals (a) and fine-grain ceramics (b). Solid arrows account for phonon scattering at lattice imperfections whereas dashed arrows account for phonon scattering at grain boundaries.
Fluorescence spectra for the doped Nd:YAG fine grain ceramic (a) and single crystal (b) at different temperatures under excitation at .
Fluorescence spectra for doped Nd:YAG single crystal and ceramic at under excitation at . Arrows indicate the presence of extra peaks in the fluorescence spectra of Nd:YAG crystals.
Detail of the highest energy fluorescence line of ions within the emission as obtained for a doped Nd:YAG crystal and fine grain ceramic.
Article metrics loading...
Full text loading...