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Cr4+:YAG

Cr4+:YAG (Y3Al5O12) is an ideal material for passive Q-switching of Nd:YAG and other Nd and Yb doped lasers in the wavelength range of 0.8 to 1.2 mm.

One of the remarkable features of Cr4+:YAG is high damage threshold (better than 500 MW/cm2).

Passive Q-Switching is preferred for simplicity of manufacturing and operation, low cost and reduced system weight and size.

Basic Properties

 

Crystal Structure

Cubic

Density

4.56g/cm3

Mohs Hardness

8.5

Recovery Time

8.5us

Thermal Conductivity

12.13W/m/K

Loss Coefficient

0.003cm-1

Refractive Index

1.82 @1064nm

Base State Absorption Cross Section

4.3x10-18/cm2

Emission State Absorption Cross Section

8.2x10-19/cm2

Fluorescence Lifetime

3.4us




Specifications

 

Orientation

The rod axis is along [100] within5°,[111] and [110] within5°

Cr4+ concentration

0.5 mol% ~ 3 mol%

Dimension

2×2~20×20mm

Initial Transmission

5%~99%

Dimension Tolerance

±0.1mm

Surface Flatness

<λ/[email protected] nm

Parallelism

<20 arc seconds

Perpendicularity

<5 arc minutes

Surface Quality

20/10 Scratch and Dig

Clear Aperture

>95%

Coating

AR/HR/PR coating upon customer’s request


Note: When ordering Cr4+:YAG crystal, please specify the aperture, initial transmission(To) and coatings.


 

 

 

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