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Nd YAG Crystal

• Various options of Nd-doping ratio (0.1%~1.3at%)
• Various options of rods or slabs (flat, wedged, Brewster, grooved, etc)
• High optical homogeneity
• High processing accuracy
• High quality coating, high damage threshold
• Very competitive price, quick delivery

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Product Details

Nd:YAG (Neodimium Doped Yttrium Aluminum Garnet) has been and continue to be the most widely used laser crystal for solid-state lasers. Good fluorescence lifetime (twice more than that of Nd:YVO₄) and thermal conductivity, as well as robust nature, make Nd:YAG crystal very suitable for high-power continuous wave, high-energy Q-switched and single mode operations.

WISOPTIC provides Nd:YAG rods with the following features: different doping levels, high optical homogeneity, high processing accuracy, precise barrel grooving and wedge angle, various end cuts, various dielectric coatings, high damage threshold.

Nd YAG Crystal

**WISOPTIC Standard Specifications* - Nd:YAG**

Standard Doping Ratio	Nd%=0.1%~1.3at%
Orientation	<111> or <100> or <110>
Orientation Tolerance	+/-0.5°
Dimensions	Diameter: 2~15 mm, Length: 3~220 mm
Dimension Tolerance	Diameter (±0.05)×Length (±0.5) mm
Barrel Finish	Ground with 400# grit, or polished
Flatness	< λ/10 @ 632.8 nm
Surface Quality	< 10/5 [S/D]
Parallelism	< 10”
Perpendicularity	≤ 5'
Chamfer	0.15 ± 0.025mm @ 45°
TransmittedWavefront Distortion	< λ/10 @ 632.8 nm
Clear Aperture	> 90% central area
Extinction Ratio	> 30 dB
Coating	AR-Coating: R<0.10% @1064nm
Laser Damage Threshold	> 800 MW/cm² for 1064nm, 10ns, 10Hz (AR-coated)
* Products with special requirement upon request.

Main Features - Nd:YAG

• High gain, low threshold, high efficiency

• Homogeneous distribution of Nd with subtle concentration gradient
• High thermal conductivity, high thermal shock resistance
• High homogeneity, low wavefront distortion
• High optical quality, low single pass loss (especially at 1064nm)
• Various modes of operation (CW, pulsed, Q-switched, mode locked)

Nd YAG Crystal

Physical Properties - Nd:YAG

Chemical formula	Y3-3xNd3xAl5O12 (x=Nd doping ratio)
Crystal structure	Cubic
Lattice constants	12.01 Å
Density	4.55 g/cm3
Rupture stress	1.3~2.6×103 kg/cm2
Melting point	1970 °C
Mohs hardness	8~8.5
Thermal conductivity	14 W/(m·K) @20°C, 10.5 W/(m·K) @100°C
Thermal expansion coefficients	7.8x10-6 /K @<111>, 7.7x10-6 /K @<110>, 8.2x10-6 /K @<100>
Thermal shock resistance	790 W/m

Optical Properties - Nd:YAG

Laser transition	4F3/2 → 4I11/2 @ 1064 nm
Photon energy	1.86×10-19 J
Emission linewidth	4.5Å @ 1064 nm
Stimulated emission cross-section	2.7~8.8x10-19 /cm2 @ Nd%=1.0at%
Loss coefficients	0.003 /cm @ 1064 nm
Fluorescence lifetime	230 µs @ 1064 nm
Refractive index	1.818 @ 1064 nm
Pump wavelength	807.5 nm
Absorption band at pump wavelength	1 nm
Polarized emission	Unpolarized
Thermal birefringence	High