YAG Substrate

Yttrium-Aluminum Garnet (YAG) is isotropic crystal with cubic symmetry. It has excellent optical and thermodynamic properties. Its mechanical properties and chemical stability are close to those of sapphire crystals without the birefringence effect of sapphire. Pure YAG crystals have higher transmittance in the 0.25~5 um region, and no absorption at 2-3 μm, while glass has strong H2O absorption band. Therefore, undoped pure YAG crystal is a new type of substrate and window material for ultraviolet and infrared optical equipment. At the same time, the excellent physical and chemical properties and optical properties of YAG crystal make it an important optical application in high-temperature and high-energy physical environments.

OST Photonics offers high quality YAG substrates for researchers and industries. Crystal orientation, size and thickness can be customized according to your requirements.

Request For Quotations

Features

  • Excellent optical and thermodynamic properties

  • Good mechanical properties

  • Excellent physical and chemical stability

Applications

  • Ultraviolet optical equipment

  • Infrared optical equipment

  • Optical application

Processing Capability

  • Orientation: <100>,<110>,<111>, etc.

  • Dimension: 1”, 2”, 5x5mm, 10x5mm, 10x10mm, 20x20mm, etc.

  • Thickness: 0.5mm, 1.0mm, etc.

  • Available items: wafers, substrates, transparent ceramics, blanks and customized optics

Specification and Properties of YAG Substrates

Crystal System

Cubic

Crystal Lattice Constant

a=12.01 Å

Melting Point

1970 ℃

Density

4.55 g/cm3

Hardness

8.5 Mohs

Specific Heat

0.59 J/g•cm-3 (0-20 ℃)

Elastic Modulus

310 GPa

Youngs Modulus

3.17×10^4 kg/mm2

Poisson Ratio

0.3

Tensile Strength

0.13-0.26 GPa

Thermal Expansion Coefficient

<111>: 7.8×10^-6 /℃ @ 0-250℃

<110>: 7.7×10^-6 /℃ @ 0-250℃

<100>: 8.2×10^-6 /℃ @ 0-250℃

Thermal Conductivity

14 W/m/K @ 20 ℃; 10.5 W/m/K @ 100 ℃

Thermo-optic Coefficient

dn/dt = 7.3×10^-6 /℃

Thermal-Shock Resistance

800 W/m

Solubility

Insoluble in water and slightly soluble in acid

Refractive Index

1.82 @ 1064 nm

Transmission Range

T>80% @ 250-5000 nm

Damage Threshold

>15 Jcm-2 @ 1064 nm

Orientation

<100>,<110>,<111>, etc.

Orientation Tolerance

±0.5° or better

Dimension

1”, 2”, 5x5mm, 10x5mm, 10x10mm, 20x20mm, etc.

Dimension Tolerance

±0.1 mm or better

Thickness

0.5mm, 1.0mm, etc.

Thickness Tolerance

±0.05 mm or better

Surface Finish

Single side polished (SSP)/Double sides polished (DSP)

Surface Roughness

Ra<5Å (5×5μm)

Package

Class 100 clean bag, Class 1000 super clean room