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Wed May 17 2017
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Undoped YAG Crystal

Undoped YAG Crystal is an excellent material for UV-IR optical windows, particularly for high temperature and high energy density application. 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.

Features of YAG Crystal

1) Transmission in 0.25-5.0 µm, no absorption in 2-3 µm
2) Extremely hard and durable
3) High thermal conductivity
4) High bulk damage threshold
5) High index of refraction and Non-birefringence

YAG Crystal Basic Properties

Crystal structure: Cubic
Density: 4.5 g/cm³
Transmission Range: 250-5000nm
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: 6.9 x 10E-6 /K
dn/dt: @633nm 7.3 x 10E-6 /K
Mohs Hardness: 8.5
Refractive Index: 1.8245 @0.8 µm, 1.8197 @1.0 µm, 1.8121 @1.4 µm

Specifications of YAG Windows

Orientation: [111] within 5°
Diameter Tolerance: +/-0.1mm
Thickness Tolerance: +/-0.2mm
Flatness: better than λ/8 @633nm
Parallelism: better than 30''
Perpendicularity: better than 5'
Scratch-Dig: 10-5 per MIL-O-1383A
Wavefront Distortion: better than λ/4 per inch @1064nm


1. YAG Windows

YAG10-1, YAG Window Dia.10 x 1 mm


YAG12-2, YAG Window Dia.12.7 x 2 mm


YAG25-2, YAG Window Dia.25.4 x 2 mm


YAG25-3, YAG Window Dia.25.4 x 3 mm


Additional message: qty. wavelength, holder...


YAG Crystal Inquiry

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