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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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