Nd:GGG is an optimal crystal for solid-state heat-capacity laser because of its high thermal diffusivity and large diameter resulting from its easiness of

growth with flat interface between solid and melt. It is also a candidate for high average power laser

with high pulse energy.

Advantages of Nd:GGG Crystals
Suitable for high energy output at heat-capacity operation
Large crystal diameter with good optical quality

Specifications

Dopant concentration

Nd: 0.5~3at%

Orientation

[111] within 5°

Wavefront distortion

≤ 0.5λ/inch@632.8nm(for the rod)

Extinction ratio

≥ 20dB @632.8nm(for the rod)

Sizes

Diameter2~70mm, Length 3~100mm
Upon request of customer

Dimensional tolerances

Diameter: +0.00/-0.05mm, Length: ± 0.5mm

Barrel finish

Ground Finish with 400# Grit or polished

Parallelism

≤ 10" (for the rod)

Flatness

≤ λ/4@632.8nm(for the rod)

AR coating reflectivity

≤0.25% @1060nm

Optical and Spectral Properties of Nd:GGG

Laser transition

4F3/2→4I11/2

Laser wavelength

1064nm

Fluorescence lifetime

240μs

Index of refraction

1.94@1060nm

Diode pump band

808nm, 881nm

Absorption linewidth

30nm@808nm, 10nm@881nm

Physical and Chemical Properties

Crystal Structure

Cubic

Lattice Constant

12.383 Å

Moh Hardness

8

dn/dT

17 x10-6/K

Poisson's Ratio

0.28

Melting Point

1725°C

Density

7.1 g/cm3

Thermal Expansion

8 x 10-6/K