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Nonlinear optical (NLO) Crystals
      The nonlinear optical (NLO) crystals are mainly used in laser frequency conversion application such as: SHG (Second Harmonic Generation), THG (Third Harmonic Generation), OPO (Optical parametric Generation), etc.
KTP crystal
    KTP crystal is the most popular NLO crytal, especially in the Nd laser frequency doubling (SHG 1064->532nm) applicaiton.

Simphoton KTP fabrication specifications:

Transmitting wavefront distortion:

less than l/4 @ 633nm

Dimension tolerance:

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

Clear aperture:

> 90% central area


l/8 @ 633nm

Surface quality:

10/5 Scratch/Dig


better than 20 arc sec.


15 arc min.

Angle tolerance:


AR coating:

dual wave band AR coating at 1064/532 nm for both faces

residual reflectivity:

< 0.2% at 1064 nm and < 0.5% at 532 nm per surface

We can also provide other NLO crystals such as: BBO crystal and LiNbO3 crystal. Please contact us for details case by case.

Contact us now for a quotation!
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