OEM manufacturer Passive Q-Switchs - Nd: YAG Crystals – Dien


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OEM manufacturer Passive Q-Switchs - Nd: YAG Crystals – Dien Detail:

Nd: YAG crystal rod is used in Laser marking machine and other laser equipment.
It is the only solid substances that can work continuously at room temperature, and is the most excellent performance laser crystal.
Also, the YAG (yttrium aluminium garnet) laser can be doped with chromium and neodymium in order to enhance the absorption characteristics of the laser.The Nd,Cr:YAG laser is a solid state laser.Chromium ion(Cr3+) has a broad absorption band; it absorbs the energy and transfers it to the neodymium ions(Nd3+) by way of dipole-dipole interactions.Wavelength of 1064nm is emitted by this laser.
The laser action of Nd:YAG laser was first demonstrated at the Bell Laboratories in the year of 1964.The Nd,Cr:YAG laser is pumped by a solar radiation.By doping with chromium,the energy absorption capacity of the laser is enhanced and ultra short pulses are emitted.


Basic Properties of Nd:YAG

Product name Nd:YAG
Chemical Formula Y3Al5O12
Crystal structure Cubic
Lattice constant 12.01Å
Melting point 1970°C
orientation [111] or [100],within 5°
Density 4.5g/cm3
Reflective Index 1.82
Thermal Expansion Coefficient 7.8×10-6 /K
Thermal Conductivity (W/m/K) 14, 20°C / 10.5, 100°C
Mohs hardness 8.5
Radiative Lifetime 550 us
Spontaneous Fluorescence 230 us
Linewidth 0.6 nm
Loss Coefficient 0.003 cm-1 @ 1064nm


Basic Properties of Nd,Cr:YAG

Laser type Solid
Pump source Solar Radiation Solar Radiation
Operating wavelength 1.064 µm 1.064 µm
Chemical formula Nd3+:Cr3+:Y3Al5O12 Nd3+:Cr3+:Y3Al5O12
Crystal structure Cubic Cubic
Melting point 1970°C 1970°C
Hardness 8-8.5 8-8.5
Thermal conductivity 10-14 W/mK 10-14 W/mK
Young’s modulus 280 GPa 280 GPa


Technical Parameters

Dimension maximum diameter of dia.40mm
Nd Dopant Level 0~2.0atm%
Diameter Tolerance ±0.05mm
Length Tolerance ±0.5mm
Perpendicularity <5′
Parallelism <10″
Wavefront distortion L/8
Flatness λ/10
Surface quality 10/ 5 @ MIL-O-13830A
Coatings HR-Coating: R>99.8%@1064nm and R<5% @808nm
AR-Coating (Single layer MgF2):R<0.25% per surface (@1064nm)
Other HR coatings Such as HR @1064/532 nm, HR @946 nm, HR @1319 nm and other wavelengths are also available
Damage Threshold >500MW/cm‍‍‍‍‍‍‍‍‍‍2

Product detail pictures:

OEM manufacturer Passive Q-Switchs - Nd: YAG Crystals – Dien detail pictures

OEM manufacturer Passive Q-Switchs - Nd: YAG Crystals – Dien detail pictures

OEM manufacturer Passive Q-Switchs - Nd: YAG Crystals – Dien detail pictures


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