Nd:YAG is a gain medium for continuous-wave and pulsed solid-state lasers, including Q-switched and frequency-doubled systems. Rod, slab and disc configurations combine dopant selection with optical finish and coating requirements.
Properties, applications and specifications
NdYAG crystal is the most mature and widely used solid-state laser material adopted by R&D, medical, industrial and military customers. Its properties are a good compromise between the strengths and weaknesses of its competition. Nd:YAG crystals are used in all types of solid-state lasers systems, e.g. frequency-doubled continuous wave laser, high-energy Q-switched pulse laser, etc. Compared with other laser crystals, its fluorescence lifetime is twice that of Nd:YVO4, and thermal conductivity is also better.
High-purity, low-loss rare-earth-doped YAG can be fabricated as rods, slabs, discs, passive Q-switches and undoped optical components. Geometry and finish depend on the development or production application.
Advantages:
1. High Gain, High Efficiency, Low Threshold 2. High Optical Quality and low Loss at 1064 nm 3. Good Mechanical and Thermal Properties 4. Easy to operate with TEM00 mode (Q-Switch, pulsed, CW)
Specifications
|
Nd dopant concentration
|
0.4~1.5 at %
|
|
Orientation
|
<111> within5°
|
|
Barrel finish
|
Ground finish 400#Gmt
|
|
Flatness
|
<λ/10 @ 632.8 nm
|
|
Parallelism
|
≤10 "
|
|
Perpendicularity
|
≤5 '
|
|
Surface Quality
|
10/5 (MIL-O-13830A)
|
|
Optical Quality
|
Interference fringes ≤ 0.125 /inch
Extinction ration Ø3~Ø6.35 ≥ 28db, Ø7~Ø10 ≥ 25dB |
|
Size
|
Rods: Ø (3~10)mm×(30~180)mm (L)
Slabs: (3~12)mm×(6~24)mm×(60~180)mm (L) Upon request of customer |
|
Dimensional tolerances
|
Diameter: +0.15 （ ±0.05mm ）
Length: ±0.5mm, chamfer: <0.1 mm @ 45º |
|
AR-Coating Reflectivity
|
R≤ 0.2% (@1064nm)
|
|
HR-Coating Reflectivity
|
R>99.9%@1064nm and T>97%@808nm
|
|
Damage Threshold
|
>700MW/cm 2 10ns 1Hz at 1064nm
|
Main properties of Nd:YAG crystal:
|
Chemical formula
|
Nd3+:Y3Al5O12
|
|
Crystal structure
|
Cubic
|
|
Density
|
4.56 g/cm3
|
|
Melting Point
|
1970℃
|
|
Specific Heat
|
0.59J/g K(at 300K)
|
|
Mohs Hardness
|
8.5
|
|
Thermal Expansion Coefficient
|
7.8 x 10-6/K [111], 0 -250℃
|
|
Thermal Conductivity
|
0.14W/m/K@20°C
|
|
Loss Coefficient
|
0.003 cm-1 @1064 nm
|
|
Laser Wavelength
|
1064nm
|
|
Fluorescence Lifetime
|
230μs
|
|
Emission Cross Section
|
7.5 x 10-19cm2
|
|
Index of Refraction
|
1.8197
|
Standard Products
|
Part No
|
Diameter(mm)
|
Length(mm)
|
Doping
|
Cut angle
|
Coating
|
|
NdYAG-4080
|
4
|
80
|
0.6%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-4100
|
4
|
100
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-4110
|
4
|
110
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-5080
|
5
|
80
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-5100
|
5
|
100
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-5110
|
5
|
110
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-5115
|
5
|
115
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-5120
|
5
|
120
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-6100
|
6
|
100
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-6110
|
6
|
110
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-6115
|
6
|
115
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-6120
|
6
|
120
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-7100
|
7
|
100
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-7115
|
7
|
115
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-7145
|
7
|
145
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-8080
|
8
|
80
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-8100
|
8
|
100
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-8110
|
8
|
110
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-8165
|
8
|
165
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-8185
|
8
|
185
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-9120
|
9
|
120
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-9150
|
9
|
150
|
1.1%
|
<111>
|
AR/AR1064 nm
|
|
NdYAG-127120
|
12.7
|
120
|
1.1%
|
<111>
|
AR/AR1064 nm
|
