Nd:YAG Laser Rods Laser Crystal

Product Item : QiM52-002
Category： Laser Crystal Rods
Nd doping concentration：0.4-1.2at%
Flatness: ＜λ/10 @632.8nm
Surface smoothness: 10/5 (MIL-O-13830A)
Applications: Laser Welding Machines
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Nd:YAG Laser Rods Laser Crystal

Neodymium doped yttrium aluminum garnet (Nd: YAG) crystal is the earliest and most famous laser crystal, and its superior basic properties make it commonly used in near-infrared solid-state lasers and their doubling frequency and triple frequency. It has been widely used in scientific research, medical, industrial, and military lasers.

Product Parameters

Parameters	Value
Nd doping concentration	0.4-1.2at%
Orientation	＜111＞±5°
Flatness	＜λ/10 @632.8nm
Parallelism	≤10″
Verticality	≤5′
Surface smoothness	10/5 (MIL-O-13830A)
Optical quality	Interference fringe: ≤0.125λ/Inch Extinction ratio: Ф3-Ф6.35≥28db Ф7-Ф10≥25db
Dimension	Rod: Ф(3-10)mm x (30-180)mm(L) Bar: (3-10)mm x (6-24)mm x (60-180)mm(L) Customized according to customer’s requirement
Tolerance	Diameter: +0.0/-0.05mm Length: ±0.5mm
Chamfering	≤0.15mm@45°
Anti reflective film	R≤0.2%@1064nm
Reflecting film	R>99.8% @1064nm and R<5%@808nm
Damage threshold	≥700MW/CM²

Physical Properties

Chemical formula	Y3Al5O12
Crystal structure	Cubic
Lattice constant	12.01
Melting point	1970℃
Mohs hardness	8.5
Density	4.5g/cm³
Refractive index	1.82
Coefficient of thermal expansion	7.8x10-6 /K(0~250℃)
Thermal conductivity	14W/m/K,20℃ 10.5W/m/K,100℃
Stimulated emission cross-section	2.8x10^-19 cm-2
Loss Coefficient	0.003 cm-1 @ 1064nm
1064nm scattering loss	0.003nm.cm-1
Laser wavelength	1064nm
Radiative lifetime	550ms