Potassium Titanyl Phosphate (KTP) Nonlinear Optical Crystal
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Potassium titanyl phosphate crystal (KTiOPO4, KTP) is a well-known nonlinear optical material for efficient frequency conversion of laser radiation in the near- and mid-infrared range. The popularity of KTP originates in its high laser-induced damage threshold of up to 30 GW/cm2 (single-shot measurement with 8.5 ns pulses at the wavelength of 1.064 µm), wide transparency range of 0.35−4.5 µm, sufficiently high nonlinear optical coefficients of d31 = 2.2 pm/V, d32 = 3.7 pm/V and d33 = 14.6 pm/V, and possibilities of manufacturing periodically poled structures in the crystal. Presently, KTP is considered a promising material for converting infrared (IR) laser radiation to terahertz waves.
|Transmitting Range:||350nm ~ 4500nm|
|Phase Matching Range:||984nm ~ 3400nm|
|Sellmeier Equations:(l in µm)||Nx2 = 3.0065 + 0.03901 / ( l2 - 0.04251) - 0.01327l2|
|Ny2 = 3.0333 + 0.04154 / ( l2 - 0.04547) - 0.01408l2|
|Nz2 = 3.3134 + 0.05694 / ( l2 - 0.05658) - 0.01682l2|
|Absorption Coefficient:||a<1%/cm @1064nm and 532nm|
|Nonlinear Optical Coefficients and Equation:||@1064nm||d31=2.54pm/V||d32=4.35pm/V||d33=16.9pm/V|
|deff(II)=(d24-d15)sin2f sin2q - (d15sin2f +d24cos2q )sinq|
|Electro-optic coefficients:||Low Frequency(pm/V)||High Frequency(pm/V)|
1. Terahertz Optical Properties of KTiOPO4 Crystal in the Temperature Range of (−192)–150 ◦C, Crystals 2021, 11(2), 125
2. Flux Growth and External Morphology of KTiOPO4 Crystals, Cryst. Growth Des. 2009, 9, 2, 1190–1193
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