YAG Optical Crystals

Undoped Yttrium Aluminium Garnet (Y3Al5O12 or YAG) is a new substrate and optical 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 similar to that of Sapphire.

Product Details

YAG optical crystals

Undoped Yttrium Aluminium Garnet (Y3Al5O12 or YAG) is a new substrate and optical 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 similar to that of Sapphire, but YAG is not birefringent. This particular feature is extremely important for some optical applications.

Features

  • Transmission in 0.25-5.0mm, no absorption in 2-3mm

  • High thermal conductivity, 10 times better than glasses

  • Extremely hard and durable

  • Non-birefringence

  • Stable mechanical and chemical properties

  • High bulk damage threshold

  • High index of refraction, facilitating low aberration lens design

Specification

Parameters of Materials

Materials

Y3Al5O12

Crystal Structure:

Cubic [111]

Moh Hardness:

8-8.5

Melting Point:

1950°C

Density:

4.55 g/cm3

Thermal Conductivity:

0.14 W/ cm°C

dn/dt:

7.4 x 10-6 oC-1

Thermal Expansion:

6.9 x 10-6 oC-1


Polishing Specification for Laser GradeⅠ

Orientation Tolerence

< 0.5°

Thickness/Diameter Tolerance

±0.1 mm

Surface Flatness

<λ/8@632nm

Wavefront Distortion

<λ/4@632nm

Surface Quality

20/10

Parallel

30〞

Perpendicular

15ˊ

Clear Aperture

>90%

Chamfer

<0.2×45°



Polishing Specification for Laser Grade Ⅱ

Orientation Tolerence

< 0.2°

Thickness/Diameter Tolerance

±0.02 mm

Surface Flatness

λ/10@632nm

Wavefront Distortion

<λ/8@632nm

surface Quality

10/5

Parallel

10〞

Perpendicular

Clear Aperture

>90%

Chamfer

<0.2×45°


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