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Three KTP laser crystals in gray color in the shape of rectangular prisms
Diagram of LBO crystal of rectangular prism shape in blue color with various arrows and broken lines displaying optical path, tuning plane, and optical axis

KTP Crystals

Wavelength range

350 – 4400 nm

Orientation accuracy of cut angle

<30 arcmin

Surface quality, S-D


Transmitted wavefront distortion, P-V

<λ/8 @ 632.8 nm

AR Coatings

On request

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KTP – Nonlinear crystal

KTP is a nonlinear optical material commonly used for frequency doubling of Nd:YAG lasers and other Nd-doped lasers, particularly at a low or medium-power density.

This material exhibits a high optical quality, broad transparency range, wide acceptance angle, small walk-off, and type I and II non-critical phase-matching (NCPM) in a wide wavelength range. KTP has a relatively high effective SHG coefficient (about 3 times higher than that for KDP) and fairly high optical damage threshold (>500 MW/cm²).

For high average-power applications, we offer high grey track resistance (HGTR) KTP crystals. Such crystals have a lower initial IR absorption and are less affected by green light than regular KTP. They help to avoid the problems of harmonic power instabilities, efficiency drops, crystal blackening, and beam distortion.

Contact us so we can provide the best solution for your application.


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