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    • Passive Q-switch Crystal
     
    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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