Neodymium Doped Yttrium Aluminum Garnet (Nd:YAG ) Crystal

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):

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

Radiative Lifetime:

550 ms

Spontaneous Fluorescence:

230 ms

Linewidth:

0.6 nm

Loss Coefficient:

0.003 cm-1 @ 1064nm
　 　

 Specifications of Nd:YAG crystal from CASTECH :

· Dimension: size up to dia.10x160mm and maximum diameter of dia.20mmx2mm

· Nd Dopant Level: 0.5~1.2(±0.1)atm%

· orientation: <111>±30arc minute

· Diameter tolerance: ±0.05mm

· Length tolerance: ±0.5mm

· Perpendicularity: < 5 arc minutes

· Parallelism: <10 arc seconds

· Wavefront distortion: λ/8

· Flatness: λ/10

· Sccratch/Dig: 10/5 @MIL-O-13830A

·Chamfer: 0.1mmx45°

· 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.

· Damage Threshold: >500MW/cm^2

Optical Parameter of Nd:YAG crystal
Diameter (mm) Standard grade Excellence grade Superexcellence grade
φ3-6.35 ≤0.5 fringes/ inch ≤0.25 fringes/ inch ≤0.1 fringes/ inch
≥25dB ≥28dB ≥30dB
φ7-10 ≤0.7 fringes/ inch ≤0.4 fringes/ inch ≤0.16 fringes/ inch
≥22dB ≥25dB ≥28dB
φ11-13 ≤1 fringes/ inch ≤0.6 fringes/ inch ≤0.2 fringes/ inch
≥20dB ≥23dB ≥26dB
φ14-16 ≤1.2 fringes/inch ≤0.8 fringes/inch ≤0.25 fringes/inch
≥18dB ≥20dB ≥23dB

Higher grade or specific Nd:YAG rods or slabs,and Nd:YAG rods for 946 nm and 1319 nm lasers can be provided.Er:YAG,Yb:YAG and other ion doped YAG crystals are also available upon request.

 
 
 
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2880 Zanker Road, Suite 203
San Jose, CA 95134		 Tel: 408-954-7329
Fax: 408-954-7330
Email: crystals@castech-us.com
 
 
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