Nd:YAG - Basic, Optical and laser Properties

Neodymium-doped Yttrium-Aluminum Garnet (Nd:YAG)

II-A. Basic Properties

Density

4.55g/cm³

Atomic Density

~1.2x10²⁰ atoms/cm³(1.0 atm% Nd dopant)

Chemical Formula

Nd:Y₃Al₅O₁₂

Crystal Structure

Cubic

Lattice Parameter

12.01

Melting Point

1970^oC

Mohs Hardness

8.5

Water Absorption

Zero

Extinction Ratio

22 ~28 dB (according to actual sizes)

Thermal Expansion Coefficient

[100] Orientation--8.2x10^-6/^oC (0-250^oC)

[110] Orientation--7.7x10^-6/^oC (0-250^oC)

[111] Orientation--7.8x10^-6/^oC (0-250^oC)

Thermal Conductivity

20^oC---0.0320 cal/sec^oC cm

40^oC---0.0290 cal/sec^oC cm

100^oC--0.0250 cal/sec^oC cm

200^oC--0.0225 cal/sec^oC cm

Modulus of Elasticity

44.9x10⁶ PSI

Tensile Strength

25-30x10⁶ PSI

II-B. Optical and Laser Properties

Lasing Wavelength	1.064 mm, 1.320 mm
Pumping Wavelength	807.5 nm
Refractive Index	1.820
Radiative Lifetime	550 ms
Fluorescence Lifetime	230 ms
Absorption Coefficient	7.2 cm^-1 @0.808 mm
Absorption Length	1.42 mm @0.808 mm
Intrinsic Loss Coefficient	0.003 cm^-1 @1.064 mm
Polarized Laser Emission	non-polarization
Stimulated Emission Cross Section	2.8x10^-19 cm² @1.064 mm