Contact Us

YAG Crystal

  • Introduction

Undoped YAG Crystal

Undoped YAG Crystal is an excellent material for UV-IR optical windows, particularly for high temperature and high energy density applications. The mechanical and chemical stability is comparable to sapphire crystal, but YAG is unique with non-birefringence and available with higher optical homogeneity and surface quality. Up to 3 YAG boule grown by CZ method, as-cut blocks, windows and mirrors are available from CryLight.



Orientation: < 111 > +/-5deg

Diameter Tolerance : +0.0 /-0.1mm

Thickness Tolerance: +/-0.2mm

Surface Quality: better than 10/5 scratch/dig

Parallelism: < 30 arcsec

Flatness: < λ/8 @632.8nm

Perpendicularity: < 5 arcmin

Wavefront Distortion: < λ/2 @632.8nm

Coating: Coating upon Request


Crystal Structure Cubic

Density 4.5 g/cm3

Transmission Range 250 - 5000 nm

Melting Point 1970 °C

Specific Heat 0.59 W·s /g /K

Thermal Conductivity 14 W/m /K

Thermal Shock Resistance 790 W /m

Thermal Expansion 6.9x10-6 /K

dn/dT, @ 633nm 7.3x10-6 /K-1

Mohs Hardness ~ 8.5

Refractive Index 1.8245 @ 0.8mm, 1.8197 @ 1.0mm,

1.8121 @ 1.4mm

Related Content
  • Dichroic Filter

    Dichroic Filter

    February 17, 2017Hyperion Optics’s complete range of cost effective dichroic filter range offers superior transmission, reflection and absorption characteristics. Key Features:Sharp transition from reflection to transmis...view
  • ZnSe ZnS window

    ZnSe ZnS window

    February 17, 2017· Low Dispersion· Available Uncoated or AR Coated· Ideal for Thermal Imaging, FLIR, and Medical Systems Hyperion Optics® Zinc Selenide (ZnSe) Windows are ideal for a wide variety of infrared applicatio...view
  • Diffractive Optical Elements

    Diffractive Optical Elements

    March 14, 2017Diffractive Optical Elements (DOEs) have complex microstructural surfaces to manipulate (or “shape”) and split laser beams in an energy-efficient manner to achieve the desired optical functions. DOEs can achieve minimal light loss and enhance optical systview