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Nd: YAG Crystal

Nd:YAG CrystalNd:YAG(Neodymium-doped Yttrium Aluminium Garnet) laser crystal provides the laser system designer with the most versatile solid state laser source in use today. With thousands of systems in daily use, Nd:YAG continues as the best of the rare earth garnet laser materials characterised by four level laser operation, permitting low threshold pulse or CW operation. Nd:YAG laser rods produce efficient laser output at 1064nm. The systems designer can select from several levels of dopant concentration to optimize laser performance.


Nd: YAG Crystal 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

 14 W/m/K, 20°C 

 10.5 W/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 us

 Spontaneous Fluorescence

 230 us

 Linewidth

 0.6 nm

 Loss Coefficient

 0.003 cm-1 @ 1064nm


Nd:YAG Specifications:


 Dopant

 0.3~2.0(±0.1)atm%

 Crystal Orientation 

 <111>

 Wavefront distortion

 λ/8 per inch @ 633 nm

 Extinction Ratio

 >28dB

 Dimension Tolerances

 Diameter: ±0.025 mm , Length: ±0.5 mm

 Surface quality

 10/5 Scratch / Dig

 Parallelism 

 < 10 arc seconds

 Perpendicularity

 < 5 arc minutes

 Clear Aperture

 >90%

 Flatness

 < λ/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

 HR Coating

 R>99.8% @ 1064nm and R<5% @ 808nm

 Damage threshold

 > 1GW/cm2@ 1064nm, 10 ns and 10 Hz

   Note: The special requirements of Nd:YAG crystals are available upon request.


Nd:YAG Standard Products:


Part No.

Doping

Dimension(mm)

Coating

NYG1003050

1%

Φ3X50

AR/AR@1064nm

NYG1004040

1%

Φ4x40

AR/AR@1064nm

NYG1006060

1%

Φ6x60

AR/AR@1064nm

NYG1006080

1%

Φ6x80

AR/AR@1064nm

NYG1006100

1%

Φ6x100

AR/AR@1064nm

NYG1006120

1%

Φ6x120

AR/AR@1064nm

NYG1006110

1%

Φ6.35x110

AR/AR@1064nm

NYG1008120

1%

Φ8x120

AR/AR@1064nm

NYG1008135

1%

Φ8x135

AR/AR@1064nm


Note: 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.