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NdYAG crystal
型号:
Lasertec's NdYAG crystal with
High Gain,High Efficiency,low threshold
High optical homogeneity and low loss at 1064nm
Good mechanical and thermal properties
Stable physical properties and humidity

Nd:YAG has been and continues to be the most mature and most widely used crystals for lasers, no matter solid state or lamp pumped, CW or pulsed.It possesses a combination of properties uniquely favorable for laser operations. We have developed the state-of-the-art crystal growing technology to enable the availability of large, high quality crystal

Lasertec’s Specifications of Nd-YAG Crystal:

Orientation:

<111> or <100> within 5°

Dimensional Tolerance:

Diameter +/-0.1mm ,Length+/-0.5mm

Wavefront Distortion:

<λ/8 at 633nm per inch

Surface Quality:

20/10

Parallelism:

< 10 arc seconds

Perpendicularity:

< 5 arc minutes

Surface Flatness:

<λ/10 at 633nm

Clear Aperture:

Central 95%

Chamfer:

0.15x45°

Coating:

1.AR@1064nm R<0.2%
2.AR@1064nm R< 0.2% & HT@808nm T>95% 
3.HR@1064nm R>99.8% & HT@808nm T>95% 
4.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95%

 

Properties of NdYAG:

Chemical Formula

Nd:Y3A15O12

Crystal Structure

Cubic

Lattice Constants

12.01Ä

Concentration

~ 1.2 x 1020 cm-3

Melting Point

1970 °C

Density

4.56 g/cm3

Mohs Hardness

8.5

Refractive Index

1.82

Thermal Expansion Coefficient

7.8 x 10-6 /K [111], 0 - 250 °C

Thermal Conductivity

14 W/m /K @20 °C, 10.5 W /m /K @100 °C.

 Lasing Wavelength

1064 nm

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

Loss Coefficient

0.003 cm-1 @ 1064 nm

Effective Emission Cross Section

2.8 x 10-19 cm2

Pump Wavelength

807.5 nm

Absorption band at pump wavelength

1 nm

Linewidth

0.6 nm

Polarized Emission

Unpolarized

Thermal Birefringence

High

 

 

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