Window crystals

/YAG window crystals Yttrium Aluminum Garnet

YAG window crystals Yttrium Aluminum Garnet

Pure YAG Yttrium Aluminum Garnet is a new substrate and window material that can be used for both UV and IR optics. It is particularly useful for high-temperature and high-energy applications. The mechanical and chemical stability of YAG is comparable to sapphire crystal, but YAG is unique with no birefringence which is extremely important for some optical applications.

  • Product Origin:

  • Shipping Port:

    Fuzhou, China
  • Lead Time:

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  • Product Detail


Pure YAG Yttrium Aluminum Garnet crystal is a new substrate and window material that can be used for both UV and IR optics. It isparticularly useful for high-temperature and high-energy applications.

Main Applications:

1) Laser igniters

2) Laser-induced breakdown spectroscopy

3) Optical substrates and windos

4) Particle image velocimetry

5) Cavity ring-down spectroscopy

6) Transparent electronic substrates

7) Right angle prism


1) Transmission in 0.25-5.0mm, no absorption in 2-3mm

2) High thermal conductivity, 10 times better than glasses

3) Extremely hard and durable

4) Non-birefringence

5) Stable mechanical and chemical properties

6) High bulk damage threshold

7) High index of refraction, facilitating low aberration lens design

Basic properties:

Chemical Formula


Crystal Structure


Lattice Parameters

12.01 Å

Melting Point:

1950 °C

Density, g/cm3


Mohs Hardness


Modulus of Elasticity


Tensile Strength


Thermal Expansion Coefficient

7.8 x 10-6/ <111>

Thermal Conductivity


Thermal Optical Coefficient (dn/dT)

7.3 × 10-6/

Thermal Shock Resistance


HGO offers YAG specifications:


<111> crystalline direction

Wavefront Distortion:

λ/4 per inch @ 632.8 nm

Dimension Tolerances

rods with diameter: +0.0/-0.05 mm , Length: ±0.1 mm

Surface Quality:

10/5 Scratch/Dig MIL-O-1380A


< 10


< 10

Clear Aperture:

> 90%

Surface Flatness:

< λ/8 @ 632.8 nm


< 0.1 mm @ 45deg.


Upon customer request


Uncoated or AR upon customer’s request

Quality Warranty Period

One year under proper use

Slabs, thread rod, Er:YAG, Yb:YAG,Cr:YAG, Ce:YAG, Tm:YAG, Ho:YAG and other ion doped YAG-based crystals are also available upon request.

Why Choose HGO ?

HG OPTRONICS.,INC. supplies high purity yttrium aluminum garnet YAG crystals. Based on over 13 years’processing experiences and advanced processing techniques, high quality YAG windows or prism with high precision is achievable. In addition, we can also produce other types of window crystals like MgF2 crystals, BaF2,LiF Crystals, etc.

YAG crystals also work as a perfect endcap for different ions doped YAG based laser crystals. HGO has advanced diffusion bonding technology and various YAG and ions doped diffusion bonding crystals are available from stock or upon request.

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