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Lithium Tantalate - Magnesium Doped

8mol% MgLT crystal for SHG (Second Harmonic Generation) laser application

 

 

Advantages : -

Lower absorption Lithium Tantalate Doped Transmissivity
High Productivity and Larger Diameter - 3 inch wafer currently available
Higher thermal conductivity among Congruent Lithium Niobate and Tantalate products
Higher Optical Damage Threshold than Magnesium Doped Lithium Niobate (compared to MgO 5mol%)

 

Properties
 
LT
LN
MgLT
MgLN
Specific heat / Jkg -1K -1[25°]
402
640
396
634
Thermal conductivity / W/mK [25°] *
4.1
3.5
4.3
4.1
Optical damage threshold at 514.5nm / W/cm 2
840
20
<1.4M
<1.4M
Refractive index [ne] at 632.8nm
2.183
2.203
2.177
2.193
Refractive index [no] at 632.8nm
2.178
2.288
2.173
2.283

* Laser Flash method

Thermal conductivity and Doping

Thermal conductivity increases as the doping concentration of MgO increases, but crystal growth becomes difficult above 9 mol%.

Doping concentrations of 8 mol% and 9 mol% have almost equal thermal conductivity of the x-axis, so 8 mol% results n the optimal solution.

Lithium Tantalate Thermal Conductivity Lithium Tantalate Doped Diffusivity

 

Reproduced by kind permission ofYamaju Ceramics Co., Ltd. . © Yamaju 2004 Specifications subject to change without notice. All rights reserved Roditi International 2007