Grooved Nd:YAG

Compared with the common Nd:YAG laser rods, the grooved Nd:YAG laser rods has the following advantages:

Thermal effect has been reduced

The quality of the beam has been improved

The efficiency of Grooved Rod has been improved by 10%-20%


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℃

Lasing Wavelengths

1064 nm

Photon Energy

1.86x10-19J@1064nm

Stimulated Emission Cross-Section

2.8x10-19 cm2

Relaxation Time of Terminal Lasing Level

30 ns

Radiative Lifetime

550us

Spontaneous Fluorescence

230us

Loss Coefficient

0.003 cm-1@ 1064 nm

Pump Wavelength

807.5 nm

Absorption band at pump wavelength

1 nm

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°

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

AR Coating

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

Slabs, Er:YAG, Nd:YAG, Ce:YAG, Cr:YAG, Tm:YAG,Ho:YAG and other ion doped YAG crystals are also available.





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