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Nd:YAG

issue date:2016-3-31 15:35:44 visit frequency:1576

Nd:YAG

Invented in the sixties of the last century, Nd:YAG has been and continue to be the most widely used laser crystal for solid-state crystal material. Its laser parameters are a good compromise between the strengths and weaknesses of its competition. Nd:YAG crystals are used in all types of solid-state lasers. Compared with others laser crystals, its fluorescence lifetime is twice more than Nd:YVO4 , and thermal conductivity is also better.


Physical Properties

Chemical Formula

Nd:Y3Al5O12

Crystal Structure

Cubic

Lattice Constants

12.01

Concentration

~ 1.2 x 1020 cm-3

Melting Point 

1970℃

Density

4.56 g/cm3

Mohs Hardness

8.5

Refractive Index

1.82

Thermal Conductivity

14 W/m /K @20℃, 10.5 W /m /K @100℃

Thermal Expansion Coefficient

7.8 x 10-6/K [111], 0 - 250℃



Optical Properties

Pump Wavelength

807.5nm

Lasing Wavelengths

1064nm

Photon Energy

1.86x10-19J@1064nm

Stimulated Emission Cross-Section

2.8x10-19 cm2

Radiative Lifetime

550us

Spontaneous Fluorescence

230us

Loss Coefficient

0.003cm-1@ 1064 nm

Absorption band at pump wavelength

1nm

Linewidth

0.6nm

Polarized Emission

Unpolarized

Thermal Birefringence

High


Specifications

Nd Dopant Level

0.5-1.1 atm%

Orientation

<111> crystalline direction (±0.5deg)

Dimension Tolerances

Diameter: ±0.05mm

Length: ±0.5mm

Wavefront Distortion

λ/8@633nm

Surface Flatness

λ/10@633nm

Parallelism

<10 arc seconds

Perpendicularity

<5 arc minutes

Surface Quality

10/5 Scratch and Dig

Clear Aperture

>90%

Chamfer

<0.1mmx45°

AR Coating

Reflectivity R<0.25%@1064 nm per surface
Damage threshold over 750 MW/cm2@1064nm, 10 ns and 10 Hz

HR Coating

Standard R>99.8%@1064nm and R<5%@808nm, Other coatings are available per your request

Extinction Ratio

Rods with diameter from 3 mm to 6.35 mm and with length to 100 mm: >30dB
Rods with diameter from 7 mm to 10 mm and with length to 100 mm: >28dB



Part No.

Diameter(mm)

Length(mm)

Doping(%)

End Wedge (Deg)

Coating

YAG003-65

3.0

65.0

0.6

0/0

AR/AR@1064nm

YAG003-78

3.0

78.0

0.6

0/0

AR/AR@1064nm

YAG102-25

2.0

25.0

1.0

0/0

AR/AR@1064nm

YAG103-50

3.0

50.0

1.0

0/0

AR/AR@1064nm

YAG103-65

3.0

65.0

1.0

0/0

AR/AR@1064nm

YAG104-50

4.0

50.0

1.0

0/0

AR/AR@1064nm

YAG104-120

4.0

120.0

1.0

0/0

AR/AR@1064nm

YAG105-85

5.0

85.0

1.0

0/0

AR/AR@1064nm

YAG106-120

6.0

120.0

1.0

0/0

AR/AR@1064nm

YAG107-120

7.0

120.0

1.0

0/0

AR/AR@1064nm

YAG107-155

7.0

155.0

1.0

0/0

AR/AR@1064nm

YAG107-145

7.0

145.0

1.0

0/0

AR/AR@1064nm

YAG107-165

7.0

165.0

1.0

0/0

AR/AR@1064nm

YAG107-185

7.0

185.0

1.0

0/0

AR/AR@1064nm

YAG108-100

8.0

100.0

1.1

0/0

AR/AR@1064nm

YAG108-145

8.0

145.0

1.0

0/0

AR/AR@1064nm

YAG108-155

8.0

155.0

1.0

0/0

AR/AR@1064nm

YAG108-165

8.0

165.0

1.0

0/0

AR/AR@1064nm

YAG108-185

8.0

185.0

1.0

0/0

AR/AR@1064nm