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* Welcome To Cr4+:YAG Crystal *
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Cr4+:YAG

Cr4+:YAG has high damage threshold and is mostly used in passively Q-switched diode pumped or lamp pumped passive Q-switching materials. Its main advantages are high damage threshold, and absorptions wavelength of 900nm--1200nm, and peak of around 1060nm with large absorption section.

Properties:

Chemical Formula

Cr4+:Y3A15O12

Structure

Cubic

Recovery time

8.5μs

Mohs Hardness

8.5

Density

4.56g/cm

Orientation

[100]

Thermal conductivity

12.13w/m/kV

Refractive index

1.82 @ 1064nm

Base state absorption cross section

σs1=4.3x10-18cm2

Emission state absorption cross section

σs2=8.2x10-19cm2

Fluorescence lifetime

3.4us



Specifications:

Cr4+ concentration

0.5 mol% ~ 3 mol%

Aperture

2x2 ~ 14x14mm

Length

0.1 ~ 12mm

Initial transmission

10% ~ 99%

Dimension tolerance

(W 0.1mm) x (H0.1mm) x (L + 0.2mm/-0.1mm)

Flatness

λ/8 @ 633nm

Scratch/Dig

10/5 per MIL-O-13830A

Parallelism

better than 20 arc seconds

Perpendicularity

15 arc minutes

Wavefront distortion

less than λ/8 @ 633nm

Clear aperture

> 90% central area

Coating

AR-coating

 

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