Nd:YAG
description:

Neodymium Doped Yttrium Aluminum Garnet (Nd:YAG ) Crystal 
Nd:YAG is the earliest and most famous laser host crystal. Since it combines great advantages in many basic properties, Nd:YAG is the ubiquitous presence for near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier.

Basic Properties of Nd:YAG:


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

Specifications of Nd:YAG crystal from SGoptics :
· 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: λ/8
· Flatness: λ/10
· Sccratch/Dig: 10/5 @MIL-PRF-13830B
·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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SGOPTICS Corp.
Address: 1258 Puwei St. Fengxian Zone Shanghai201400 China
Tel: 86-21-64973170          Fax: 86-21-64973170
E-mail: nash.sgoptics@outlook.com   Web: http://www.shsgoptics.com/