Nd:YAG

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.
It is widely used as a solid-state laser materials. YAG rod’s role is to generate a laser, with the partial and full reflect mirror on both ends ,YAG rod can produce a stable and continuous laser, it is the core part of YAG and fiber laser. Nd: YAG laser wavelength is 1064nm, it can be used in military, medical, industrial and other fields.
Advantage of Nd YAG Rod

  • High gain                                 
  • Low threshold 
  • High efficiency                       
  • High optical quality 
  • Low loss
  • Large mechanical strength 
  • Good thermal conductivity and thermal shock characteristics 
  • Suitable for different modes of operation (cw, pulsed, Q-switched, mode locked, doubling of frequency) 
  • Suitable for high-average power lasers
Basic Properties:

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

7.8x10-6 /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

Technical Parameters:
  • Dimention: 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:λ/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 .