Potassium titanium phosphate (KTiOPO4, KTP) is an important nonlinear optical material. The material has great thermal stability, theoretically outstanding optical nonlinearity, and a relatively high photodamage threshold (about 15 J/cm2). In the wavelength range between 350 and 2700 nm, KTP crystals are relatively transparent, but their transmission decreases and they become almost completely opaque. In comparison to KDP, its second harmonic generation (SHG) coefficient is nearly three times higher. Its Mohs hardness is approximately 5.
Alfa Chemistry offers customers a wide range of KTP crystals, typically used in frequency-doubled diode-pumped solid-state lasers such as Nd:YAG and other neodymium-doped lasers.
In practice, the KTP crystal needs to have a stable temperature to operate if pumped with 1064 nm. However, it is prone to photochromic damage during high power 1064 nm second harmonic generation, which often limits its application in low and medium power systems.
Features of Alfa Chemistry KTP
- Large nonlinear optical coefficients.
- High optical damage threshold.
- High thermal conductivity.
- Wide angular bandwidth and small walk angle.
- Wide temperature and spectral bandwidths.
- Large optical nonlinearity of the second harmonic generation (SHG).
- Excellent thermal stability, no hygroscopicity, good chemical and mechanical properties.
- Flux growth with very low cost compared to KTA, BBO and LBO.
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