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Er:YAG


Er:YAG combine various output wavelength with the superior thermal and optical properties of YAG. It’s an excellent laser crystal which lasers at 2.94um highly surface cutting laser. It is a well known material for medical applications. 


Advantages

Very high slope efficiency

●Operates well at room temperature

●Operate in a relatively eye-safe wavelength range

 

Laser Rods

● Flat/flat

●Parallel/ anti-parallel wedged

●Brewster angle

●Concave/convex radii

●Cylinder grooved



Specifications

Material

Er:YAG

Dopant concentration

Er: ~50 at%

Orientation

<111>

Dimensions

Diameter:2mm-50mm, Length:5mm-180mm(Upon customer’s request)

Diameter tolerance

+0/-0.04mm

Length tolerance

+0.5/-0mm

Chamfer

0.1mm@45°

Extinction Ratio

>25dB(depends on actual size)

Flatness

<λ/10@632.8nm

Barrel Finish

Ground Finish 400#Grit

Surface Quality

10-5 @MIL-0-13830A

Chips

<0.1mm

Perpendicularity

<5 arc minutes

Parallelism

<10 arc seconds

Wavefront Distortion

λ/8  per inch @632.8nm

Damage Threshold

>500MW/cm2

Anti-Reflection coating

R<0.20%@2940nm per surface

Properties

Chemical Formula

Er3+:Y3Al5O12

Laser Transition

4I11/2 to 4I13/2

Photon Energy

6.75×10-20J@2940nm

Laser Wavelength

2940nm

Emission  Cross Section

3×10-20 cm2

Index of Refraction

1.79@2940nm

Pump  Bands

600~800nm

Moh Hardness

8.25

Melting Point

1965℃

Thermal Conductivity

11.2W/m/K

Thermal shock Resistance

790W/m