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    Multi-Order Waveplates

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    Multi-Order Waveplates

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    Waveplates
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    Specifications:

     

    Material

    Crystal Quartz

    Diameter Tolerance +0/-0.25mm
    Clear Aperture ≥ central 90%  of  diameter
    Retardance Accuracy <λ/300
    Surface Quality 20/10
    Wavefront  Distortion λ/10 @632.8nm over the clear  aperture
    Parallelism ≤3″
    Coating R<0.25%
    Damage Threshold 2MW/cm2,2J/cm2,10ns

     

       

       ?   Wide Temperature Bandwidth   

       ?  CASTECH’s standard coatings are available   

       ?   Custom designs for other sizes and coatings are also vailable upon request.   

     

    Single Wavelength Waveplates

     

     

    Order Information:

     

    WPL ---- 254 ---- 1/4 ---- W1064
         
    Product Code   Φ=25.4mm   Retardation=λ/4   Wavelength "λ"=1064nm

     

     

    Half  Waveplate

    Quarter Waveplate
       WPL-127-1/2-λ       WPL-127-1/4-λ   
    WPL-150-1/2-λ WPL-150-1/4-λ
    WPL-200-1/2-λ WPL-200-1/4-λ
    WPL-254-1/2-λ WPL-254-1/4-λ

     

    Standard Wavelength (λ):

     

    Wavelength
    248nm 413nm 514.5nm 632.8nm 800nm 1064nm
    266nm 441.6nm 532nm 647.1nm 830nm 1300nm
    308nm 457.9nm 543.5nm 676.4nm 850nm   1315nm  
    351nm 488nm 594nm   694.3nm   905nm 1320nm
      354.7nm     510.5nm     611.9nm   780nm   1050nm   1550nm

     

    Dual Wavelength Waveplates

     

     Dual wavelength waveplate is widely used on Third Harmonic Generation (THG) system. When you need a NLO crystal for type II SHG (o+e→e), and a NLO crystal for type II THG (o+e→e), the  out put polarization from SHG can not be used for THG. So you must  turn the polarization to get two perpendicular polarization for type II THG. Dual wavelength waveplate works like a polarizing rotator, it can rotate the polarization of one beam and remain another beam's polarization. Also the dual wavelength waveplate can be applied to following systems: 

     

            ?   Type II SHG + Type II THG

            ?   Type II SHG + Type I THG

            ?   Type I SHG  + Type I THG 

     

    For example: we use KTP as SHG type II and LBO as THG type II, but the polarization of output beam from KTP is not optimized for THG type II. When we use a dual wavelength waveplate as drawing, it can change the 532nm beam to a special angle polarization but not change 1064nm beam at all.

     

     

    Specifications:

     

    Material Crystal Quartz
    Diameter Tolerance +0/-0.25mm
    Clear Aperture ≥ central 90%  of  diameter
    Retardance Accuracy <λ/100
    Surface Quality 20/10
    Wavefront  Distortion λ/10 @ 632.8nm over the clear aperture
    Parallelism ≤3″
    Coating Laser Line V AR Coating  R<0.25%< span="">
    Damage Threshold 2MW/cm2,2J/cm2,10ns

     

     

    Order Information:

     

    WPD ---- 127 ---- 1/2 ---- 1/4 ---- W1064 ---- W532
             
    Product Code   Φ=25.4mm   Retardation1 1=λ/2   Retardation1 2=λ/4   Wavelength1 1=1064nm   Wavelength1 2=532nm


    Standard Retardation:

     

    Wavelength 1-Wavelength2  W1064-W532(nm)  W1064-W532(nm) W532-W266(nm) W532-W355(nm)
    Retardation 1-Retardation2 λ-λ/2 λ/2-λ λ/4-λ/2 λ/2-λ/4

     

    Note:

       ?  Custom designs for other sizes ,coatings and holders are also available upon request.

       ?  CASTECH's standard coatings are available upon request.

     

     

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