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* Welcome To Nd:YAG Crystal *
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Nd:YAG

Nd:YAG (Neodimium Doped Yttrium Aluminum Garnet) is well-known laser crystal for solid-state crystal material. It is used almost in all types of solid-state lasers systems by means of the following properties:

High Gain, Low Threshold, High Efficiency.

Low Loss at 1.06 mm, High Optical Quality.

Good Mechanical and Thermal Properties.

Due to the cubic symmetry and high quality, Nd:YAG is easy to operate with TEM00 mode.

 Physical and Optical Properties:

Chemical Formula

Nd:Y3Al5O12

Structure

Cubic

Cell parameter

12.01

Melting point

1970 oC

Density

4.5g/cm3

Reflective Index

1.82

Thermal Expansion Coefficient

7.8x10-6 /K <111>

Thermal Conductivity (W/m/K)

14W/m/K, 20 C
10.5W/m/K, 100 C

Mohs hardness

8.5

Stimulated Emission Cross Section

2.8x10-19 cm-2

Relaxation Time of Terminal Lasing Level

30 ns

Radiation Lifetime

550 m s

Spontaneous Fluorescence

230 m s

Linewidth

0.6 nm

Polarized Emission

Unpolarized

Loss Coefficient

0.003 cm-1 @ 1064nm

Specifications:

Dopant

1+/-0.1atm%

Orientation

<111> crystalline direction

Wavefront distortion

l/8 per inch @ 633 nm

Extinction Ratio

>28dB

Dimension Tolerances

Diameter: 0.025 mm , Length: 0.5 mm

Surface quality

10/5 Scratch / Dig per MIL-O-1380A

Parallelism

< 10 arc seconds

Perpendicularity

< 5 arc minutes

Clear Aperture

>90%

Flatness

<l/10 @ 633 nm

Chamfer

<0.1 mm x 45

Barrel Finish

50-80 micro-inch (RMS)

Anti-Reflection Coating

R < 0.20% @ 1064 nm per surface. Damage threshold over 1GW/cm2@ 1064nm, 10 ns and 10 Hz.

HR Coating

R>99.8% @ 1064nm and R<5% @ 808nm

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