Nd:YAG CRYSTAL

Angle tolerance:

Δθ< ± 0.5°; Δφ< ±0.5°

Dimensional Tolerance:

(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2/-0.1mm)

Flatness:

<L/8 at 633nm                    

Surface Quality(S/D):

10/5 before coating,  20/10 after coated

Parallelism:

< 20 arc seconds

Perpendicularity:

< 5 arc minutes

Wavefront Distortion:

<L/8 at 632.8nm                    

Clear Aperture:

Central 95%

Bevel (leg width):

<0.15mm x 45degree                    

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%

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.

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