0
Sales engineer
Arminas Butkus +370 5 219 4884
KTP crystals
INQUIRY FORM
please fill this field
please fill this field
please fill this field
please fill this field
please fill this field
close
close
Success!

One of our 4Lasers team members will contact you as soon as possible.

GO BACK TO HOMEPAGE

KTP crystals

Main features

 

  • High nonlinearity
  • Nonhygroscopic
  • Great mechanical stability
  • Wide transparency range from 350 nm to 4,5 μm
  • Broad angular and thermal acceptance
  • Broad type I and II non-critical phase-matching range

 

Application examples

 

  • Low and medium power frequency doubling of Nd-doped lasers
  • KTP OPO and ZGP OPO tandem for mid-infrared generation
Request custom
  • Description
  • Properties
  • Specifications

Potassium tytanyl phosphate (KTiOPO4, KTP) crystals advantages include high nonlinearity, great mechanical stability, high optical quality and transparency range of 350 nm - 4,5 μm. These perks determine wide KTP crystals applications as nonlinear medium. It is an excellent solution for frequency doubling applications of Nd-doped lasers, especially for low and medium power applications, both intra- and extra-cavity design. In addition, these crystals can be used as nonlinear OPO medium for IR generation up to 4 μm and used as pump source for mid-IR nonlinear crystals based optical parametric oscillators, such as ZGP OPO. KTP crystals are susceptible to photochromic damage (grey-tracking), which causes deterioration of nonlinear conversion efficiency. 4Lasers provide high grey track resistance (HGTR) KTP crystals as a solution, which significantly improves grey-track resistance and overall performance. HGTR KTP crystals extend KTP use as nonlinear medium range to high-power applications.

Physical and optical properties
Chemical formula KTiOPO4
Crystal structure Orthorhombic, mm2
Lattice parameters a = 12,814 Å, b = 6,404 Å, c = 10,616 Å
Optical symmetry Positive biaxial (2VZ = 37,4° @0,5461 μm)
Density 2,945 g/cm3
Mohs hardness 5
Transparency range 350 nm - 4,5 μm @"0" transmittance level
Dispersion equations @188 nm - 5.2 µm (λ in µm) nX2 = 3,0067 + 0,0395/(λ2 - 0,04251) - 0,01247 λ2;

nY2 = 3,0319 + 0,04152/(λ2 - 0,04586) - 0,01337 λ2;

nZ2 = 3,3134 + 0,05694/(λ2 - 0,05941) - 0,016713 λ2
Refractive indices @1064 nm nX = 1,7404; nY = 1,7479; nZ = 1,8296
KTP crystals
Orientation accuracy <30 arcmin
Clear aperture >90%
Face dimensions tolerance +0/-0,1 mm
Length tolerance ±0,1 mm
Parallelism error <20 arcsec
Perpendicularity error <5 arcmin
Protective chamfers <0,1 mm at 45°
Surface quality 10-5 S-D
Wavefront distortion <λ/[email protected],8 nm
Coatings AR(R<0,25%)@532+1064 nm on both faces
Laser induced damage threshold >500 MW/cm2@1064 nm, 10 ns
Mount Unmounted
Order your item
Face dimensions Length Theta Phi Coating Application SKU price quantity
3x3 mm
5 mm
90°
23,5°
AR/[email protected]+1064 nm
[email protected] nm, type II
7184
75 €
3x3 mm
10 mm
90°
23,5°
AR/[email protected]+1064 nm
[email protected] nm, type II
7188
105 €
5x5 mm
5 mm
90°
23,5°
AR/[email protected]+1064 nm
[email protected] nm, type II
7189
180 €
5x5 mm
10 mm
90°
23,5°
AR/[email protected]+1064 nm
[email protected] nm, type II
7193
290 €
7x7 mm
5 mm
90°
23,5°
AR/[email protected]+1064 nm
[email protected] nm, type II
7194
350 €
7x7 mm
10 mm
90°
23,5°
AR/[email protected]+1064 nm
[email protected] nm, type II
7198
495 €