Nd:Ce:YAG Laser Crystal

Nd:Ce:YAG is an excellent laser material used for no-water cooling and miniature laser systems. The thermal distortion of Nd:Ce:YAG is appreciably less and the output laser energy is greater(30%-50%) than that in Nd:YAG at the same pumping. It is the most ideal laser material for air cooling laser and is also suitable for different modes of operation (pulsed, Q-switched, mode locked) and high-average power lasers.

Advantages

1 ) Low threshold

2 ) Very high slope efficiency(30%-50% more than Nd:YAG)

3 ) Good anti-UV irradiation property

4 ) Good thermal stability

5 ) High optical quality

Specifications

Material

Nd:Ce:YAG

Dopant Concentration

Nd:1.0 – 1.1atm%  Ce:0.05-0.1atm%

Orientation

<111> or <100>

Dimension

Diameter:1mm-30mm Length:1mm-115mm(upon customer’s request)

Wavefront Distortion

<λ/10 per [email protected]

Extinction Ratio 

>30dB (depends on actual sizes)

Diameter Tolerance

+0/-0.04mm

Length Tolerance

+0.5/-0mm

Chamfer

<0.1mm@45°

Chips

<0.1mm

Barrel Finish

50-80 micro-inch(RMS)

Clear Aperture

>95%

Flatness

λ/10 per [email protected]

Scratch/Dig 

10-5 @MIL-0-13830A

Perpendicularity 

 <5 arc minutes

Parallelism

 <10 arc seconds

Damage Threshold

>750MW/cm2@1064nm 10ns 10HZ

Anti-Reflection Coating

R<0.15%@1064nm per surface

High-Reflection Coating

Standard HR coating with R>99.8%@1064nm and R<5%@808nm

Properties

Crystal Structure

Cubic

Lattice Constant

12.01Å

Melting Point

1970°

Rupture Stress

1.3-2.6*103 kg/cm2

Density 

4.55g/cm3

Mohs Hardness

8.5

Thermal Expansion Coefficient

[100] Orientation–8.2×10-6/oC (0-250oC)

[110] Orientation–7.7×10-6/oC (0-250oC)

[111] Orientation–7.8×10-6/oC (0-250oC)

Laser Transition

4F3/2 –> 4I11/2

Laser Wavelength

1064nm

Photon Energy

1.86×10-19J

Emission Linewidth

4.5Å @1.064µm

Stimulated Emission Cross Section

2.7-8.8×10-19 cm2 @Nd 1at%

Fluorescence Lifetime

230µs

Refractive Index

1.8197 @1.064µm