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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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