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Non-linear Crystal Potassium Titanyl Phosphate (KTiOPO4 or KTP)
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Potassium Titanyl Phosphate (KTiOPO4 or KTP) is an excellent non-linear crystal. It exhibits high optical quality, broad transparent range, relatively high effective SHG coefficient (about 3 times higher than that of KDP), very high optical damage threshold, wide acceptance angle, small walk-off, and type I and type II non-critical phase-matching (NCPM) in a wide wavelength range. KTP is the most commonly used material for frequency doubling of Nd:YAG lasers and other Nd-doped lasers, particularly at the low or medium power density. The properties of KTP make it superior as an electrooptic modulator as well as an optical waveguide device, including phase modulators, amplitude modulators and directional couplers.

APPLICATIONS:
  • Second harmonic generator of radiation 1.064 µm
  • Optical parametric oscilator in near IR region up to 4 µm
  • Different frequency generator in near IR region
MAIN PROPERTIES:

Transparency range, nm 350 - 4500
Crystal structure, Point group orthorhombic, point group mm2
Space group Pna21
Lattice parameters, Å a = 12.818, b = 6.404, c = 10.596 Å
Mohs hardness 5
Density, g/cm3 3.03
Thermal expansion coefficient, at 100 C: 1 = 8.7 x 10-6 x C-1
2 = 10.5 x 10-6 x C-1
3 = -0.2 x 10-6 x C-1
Thermal conductivity, mW x cm -1 x C -1 k1 = 20, k2 = 30, k3 = 33
Non-linear coefficient, pm/V d31 = 6.5; d32 = 5.0; d33 = 13.7; d34 = 7.6; d35 = 6.1;
Electrooptic coefficients r13 = 9.5, r23 = 15.7, r33 = 36.3 pm/V
Refractive indexes:
at 1064 nm nx = 1.738; ny = 1.746; nz = 1.830
at 532 nm nx = 1.779; ny = 1.789; nz = 1.889
Optical damage threshold, MW/cm2 500 (1064 nm, 20 ns, 20 Hz)
Conversion efficiency, % 60 (1064 nm, 10 ns, 50 Hz, 2 W)

  We supply KTP optical elements made according to customers' order.

I N Q U I R Y    F O R M :

Material:
Quantity of elements:
Application:

For example: SHG@1064; SFG@800+267->200; DFG@780-842->10600; OPO@355->460÷560+960÷1150; etc.
polished sites:

BLOCK    or  BLOCK
 a-b b-c a-c
or d  
Type & angles:
 I    II         angles:  theta  , phi
Dimensions/Tolerances:
For example:
10.0 +/- 0.1
Coating:

For example: p-coating, ARC s1/s2 1064 R<0.25%; ARC s1/s2 1064 R<0.25%+532<0.5%;
BBAR s1/s2 1064 R<1%+3÷10<5% etc.
a = mm;
c = mm
b     = mm or
dia. = mm;
This field is for additional information such as application,
comments, add. requirements etc.

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