Nd:YAG

Nd:YAG


Nd:YAG (Neodymium Doped Yttrium Aluminum Garnet) crystal is the most widely used solid-state laser material today. Now, we are able to stably supply quantity of Nd:YAG rods with high optical homogeneity, consistent performance, high processing accuracy and on time delivery.

Advantage

High gain, High efficiency, Low threshold, Low loss at 1.06 µm
Good thermal conductivity and thermal shock characteristics
Mechanical strength, High optical quality
Various modes of operation (CW, pulsed, Q-switched, mode locked)
 

 

 Basic Properties

Chemical Formula: Y3Al5O12
Crystal structure: Cubic
Lattice constant: 12.01Å
Melting point: 1970°C
Density: 4.5g/cm3
Reflective Index: 1.82
Thermal Expansion Coefficient: 7.8x10-6 /K <111>
Thermal Conductivity (W/m/K): 14,  20°C
10.5,  100°C
Mohs hardness: 8.5
Stimulated Emission Cross Section: 2.8x10-19 cm-2
Relaxation Time of Terminal Lasing Level: 30 ns
Radiative Lifetime: 550 us
Spontaneous Fluorescence: 230 us
Linewidth: 0.6 nm
Loss Coefficient: 0.003 cm-1 @ 1064nm

Coating Service

◇ 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 @ 946nm, HR 1319 nm and other wavelengths are also available. 

Capability

Common Specification
 Dimension size up to dia.15x160mm and maximum diameter of dia.40mmx2mm
Nd Dopant Level 0.3~2.0(±0.1)atm%
Diameter Tolerance ±0.05mm
Length Tolerance ±0.5mm
Perpendicularity < 5 arc minutes
Parallelism <10 arc seconds
Wavefront Distortion Lambda/8
Flatness Lambda/10
Surface Quality S/D 10-5
Barrel Finish 50-80 micro-inch (RMS)
Chamfer 0.1mmx45°
Damage Threshold >500MW/cm2

Optical Parameter of Nd:YAG crystal

Diameter Standard grade Excellence grade Superexcellence grade
Dia.3-6.35mm ≤0.5 fringes/ inch ≤0.25 fringes/ inch ≤0.1 fringes/ inch
≥25dB ≥28dB ≥30dB
Dia.7-10mm ≤0.7 fringes/ inch ≤0.4 fringes/ inch ≤0.16 fringes/ inch
≥22dB ≥25dB ≥28dB
Dia.11-13mm ≤1 fringes/ inch ≤0.6 fringes/ inch ≤0.2 fringes/ inch
≥20dB ≥23dB ≥26dB
Dia.14-16mm ≤1.2 fringes/inch ≤0.8 fringes/inch ≤0.25 fringes/inch
≥18dB ≥20dB ≥23dB

Notes:

Slabs, thread rod, Er:YAG, Yb:YAG,Cr:YAG,Ce:YAG,Tm:YAG,Ho:YAG and other ion doped YAG crystals are also available upon request.