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    KTP Crystal

    • Introduction

    KTP crystal design

    KTP crystal is mostly used as nonlinear crystals for frequency doubling of solid-state Nd:YAG crystal or Nd:YVO4 crystal laser, as it has large nonlinear optical coefficients, wide angular bandwidth and small walk-off angle, broad temperature and spectral bandwidth. KTP crystal also has high electro-optic(E-O) coefficient and low dielectric constant, and large figure of merit, these features make it also widely used in electro-optic application.

    Advantages of KTP Crystal:

    • Large Nonlinear Optical (NLO) Coefficients
    • Wide Angular Bandwidth and Small Walk-off Angle
    • Broad Temperature and Spectral Bandwidth
    • High Electro-Optic (E-O) Coefficient and Low Dielectric Constant
    • Large Figure of Merit for an Optical Waveguide Modulator
    • Nonhygroscopic, Good Chemical and Mechanical Properties


    Capabilities of KTP Crystal:

    Aperture: 2x2 ~ 10x10mm

    Lenght: 0.1 - 20mm

    Cutting Angle q and f: Determined by different kinds of homonic generartion

    Phase matching type: Type I or Type II

    End Configuration: Plano/Plano or Brewst/Brewst or Specified

    Specifications of KTP Crystal:

    Angle tolerance: Δθ< ± 0.5°; Δφ< ±0.5°

    Dimensional Tolerance: (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm)

    Flatness: <λ/8 at 633nm

    Surface Quality: 10/5 Scracth/Dig

    Parallelism: < 20 arc seconds

    Perpendicularity: < 5 arc minutes

    Wavefront Distortion: <λ/8 at 632.8nm

    Clear Aperture: Central 95%

    Chamfer: 0.15x45°

    Coating: a) * S1,S2: AR @ 1064 nm R<0.1% & 532nm R<0.25%

    b) * S1:HR @ 1064nm R>99.8% & HT@ 808nm T>95%

    S2:AR @ 1064 nm R<0.1% & 532nm R<0.25%

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