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.
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Advantages of Cr4+:YAG Crystals?
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Capabilities:
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Cr4+ dopant:
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0.5 mol% ~ 3 mol%
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Aperture:
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2x2 ~ 14x14mm
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Length:
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0.1 ~ 12mm
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Initial Ttransmission
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10% ~ 99%
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Specifications:
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Orientation:
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<111> or <100> within 5°
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Dimensional Tolerance:
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+/-0.1mm
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Flatness:
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<λ/8 at 633nm
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Surface Quality:
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20/10 Scracth/Dig
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Parallelism:
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< 20 arc seconds
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Perpendicularity:
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< 5 arc minutes
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Wavefront Distortion:
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<λ/8 at 633nm
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Clear Aperture:
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Central 90%
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Chamfer:
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0.15x45°
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Coating:
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* S1,S2: AR@1064nm
* S1: HR@1064nm; S2: AR@1064nm |
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Chemical Formula
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Cr4+:Y3A15O12
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Crystal Structure
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Cubic garnet
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Recovery time
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8.5μs
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Hardness Mohs
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8.5
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Density
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4.56g/cm
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Orientation
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[100]+/-10°
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Thermal conductivity
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12.13w/m/k
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Refractive index
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1.82 @ 1064nm
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Base state absorption cross section
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σs1=4.3x10-18cm2
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Emission state absorption cross section
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σs2=8.2x10-19cm2
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Fluorescence lifetime
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3.4us
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