Crystal growth, VTE treatment, and characterizations of Nd-doped LiTaO3

Nd:MgO:LiTaO3 crystal for self-doubling laser applications: growth, structure, thermal and laser properties

“…The thermal diffusivity along the c-axis is larger than that in Nd:LT (1.42 mm 2 s 21 ) as reported by Lan. 23 The thermal conductivity along the c-axis is 5.155 W m 21 K 21 at room temperature, which is larger than that of the 5 mol% MgO:LT. 12 We believe this result arises because of fewer defects in the Nd:Mg:LT crystal, which diminishes phonon scattering. The higher thermal conductivity and diffusivity at room temperature is favorable for contributing to the stability of laser devices operating at high power levels.…”

“…This result is verified by measuring the Curie temperature at the head and tail of the crystal body, as shown in supplement 2, ESI. 3 It was reported that the k eff of neodymium was 0.98 in 2 at% MgO:LT, 22 while it was 1.2 in pure LT. 23 The k eff of Mg 2+ in the LT crystal is stable at around 1.17, and is apparently not influenced by other doping ions. 24 In contrast to the results reported by other researchers, in this study it is found that the segregation coefficient k eff of neodymium is sensitive to the codoping of magnesium in LT, and decreases with increasing magnesium doping in the LT crystal.…”

“…5. The thermal conductivity was measured using a density r = 7.49 g cm 23 , which was measured by the buoyancy method 33 at room temperature (21 uC). Both the thermal diffusivity and conductivity along the c-axis are greater than those along the a-axis.…”

The impact of the simultaneous presence of Li and Nb(Ta) vacancies in the defect structure of pure LiBO3 (B=Nb, Ta) on the curie temperature

“…The fabrication techniques for lithium niobate (LiNbO3) and lithium tantalate (LiTaO3) include the growth methods of flux melting and solution growth, as well as the Bridgman or Czochralski methods [7]. Additional techniques such as High Temperature Top Seeded Solid Solution Growth (HTTSSG) [8,9] and Vapor Transport Equilibrium (VTE) [10] are also employed. These techniques allow to produce crystals of varying sizes and purities, as well as thin films on substrates.…”