Properties of KTP Single Crystal
Potassium Titanyl Phosphate, known as KTP( KTiOPO4), is widely used in frequency doubling of Nd-doped laser systems for Green/Red output; parametric sources(OPG, OPA and OPO) for 600nm-4500nm tunable output; E-O modulators, Optical Switches, Directional Couplers; Optical Waveguides for Integrated NLO and E-O Devices etc.
|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)|
|Crystal Structure:||Orthorhombic, opint group mm2|
|Cell Parameters:||a=6.404Å, b=10.616Å, c=12.814Å, z=8.00Å|
|Electrical Conductivity:||3.5x10-8 s/cm (c-axis, 22°C, 1KHz)|
KTP was first introduced as the NLO crystal for Nd doped laser systems with high conversion efficiency. Under certain conditions, the conversion efficiency was reported to 80%, which leaves other NLO crystals far behind.
Recently, with the development of laser diodes, KTP is widely used as SHG devices in diode pumped Nd:YVO4 solid laser systems to output green laser, and also to make the laser system very compact.
KTP for OPA, OPO Applications:
In addition to its wide use as a frequency doubling device in Nd-doped laser systems for Green/Red output, KTP is also one of the most important crystals in parametric sources for tunable output from visible (600nm) to mid-IR (4500nm) due to the popularity of its pumped sources, the fundamental and second harmonic of a Nd:YAG or Nd:YLF lasers.
One of the most useful applications is the non-critical phase-matched (NCPM) KTP OPO/OPA pumped by the tunable lasers to obtain a high conversion efficiency.
KTP OPO results in stable continuous outputs of femto-second pulse of 108 Hz repetition rate and milli-watt average power levels in both signal and idler outputs.
Pumped by Nd-doped lasers, KTP OPO has obtained above 66% conversion efficiency for down-conversion from 1060nm to 2120nm.
KTP crystal can be used as electro-optical modulators. For more information, please contact our sales engineers.E-mail this link to a friend