Passive Q-switch Crystal

 

Cr4+-YAG

Passive Q-Switching is preferred for simplicity of manufacturing and operation, low cost and reduced system size and weight. Cr4+:YAG (Y3Al5O12) is an excellent crystal for passively Q-switching diode pumped or lamp-pumped Nd:YAG, Nd:YLF, Yb:YAG or other Nd and Yb doped lasers at wavelength from 1.0 to 1.2 mm. Because of its chemically stable, durable, UV resistant, good thermal conductivity and high damage threshold (> 500 MW/cm2) and being easy to be operated, it will replace traditional materials, such as, LiF, organic Dye and color centers.

 

Advantages of Cr4+:YAG Crystals 

  • Providing high power laser pulses without electro-optic Q-switches
  • More robust and stable than dyes or color centers
  • High damage threshold

 

 

Capabilities:

Cr4+ dopant:
0.5 mol% ~ 3 mol%
Aperture:
2x2 ~ 14x14mm
Length:
0.1 ~ 12mm
Initial Ttransmission
10% ~ 99%

Specifications:

Orientation:
<111> or <100> within 5°
Dimensional Tolerance:
+/-0.1mm
Flatness:
<λ/8 at 633nm
Surface Quality:
20/10 Scracth/Dig
Parallelism:
< 20 arc seconds
Perpendicularity:
< 5 arc minutes
Wavefront Distortion:
<λ/8 at 633nm
Clear Aperture:
Central 90%
Chamfer:
0.15x45°
Coating:
* S1,S2: AR@1064nm
* S1: HR@1064nm;
S2: AR@1064nm
Chemical Formula
Cr4+:Y3A15O12
Crystal Structure
Cubic garnet
Recovery time
8.5μs
Hardness Mohs
8.5
Density
4.56g/cm
Orientation
[100]+/-10°
Thermal conductivity
12.13w/m/k
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

 

 

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


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