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HGTR KTP Crystals

  • High gray track resistance
  • High damage threshold: >2GW/cm^2 (@1064nm; TEM00, 10nS,10Hz)
  • High conversion efficiency up to 80%
  • Common Applications: Continuous Wave (CW) and high average power SHG for green laser, EO moulations, optical waveguide
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HGTR-KTP crystals Dimension Tolerance (W±0.1mm)x(H±0.1mm)x(L+0.5/-0.1mm)
Size Range Aperture:~10x10mm; Length: ~15mm Clear Aperture central 90% or the diameter
Scattering of Crystals No visible scattering paths or centers
under the inspection of 50mW green laser
Flatness less than λ/8 @ 633nm
Transmitting Wavefront Distortion less than λ/8 @ 633nm Chamfer ≤0.2mmx45°
Chip ≤0.1mm Surface Quality better than 10/5 S/D (MIL-PRF-13830B)
Parallelism ≤20 arc seconds Perpendicularity ≤5 arc minutes
Angle Tolerance ≤0.25° Coating AR/AR@1064nm+532nm (R<0.2%@1064nm and R<0.5%@532nm)
Quality Warranty Period one year under proper use

Gray track resistance in HGTR KTP (KTiOPO4) Crystals is significantly higher than in flux-produced KTP. In comparison to ordinary KTP crystals which are flux or hydrothermally grown, HGTR KTP crystals are grown from unique modified fluxes and heat treatment, imparting them with immunity to gray track damage, which could be seriously interrupting for high power applications.

Hangzhou Shalom EO offers the High Gray Track Resistance KTP crystals (HGTR KTP), with no detrimental absorption for high repetition/high power SHG at 1064nm or OPO of 532nm pumped light source. The crystals are optimized for laser systems with high power levels, requiring substantially efficient conversion and durability, providing elevated overall performance than regular flux-grown KTP crystals.


  • Second harmonic generation for frequency doubling
  • Optical parametric oscillator (OPO)
  • Electro-optic pockels cells
  • Quasi phase matching

HGTR-KTP Crystals for EO Applications

HGTR-KTP Crystals for EO Applications

  • Low insertion loss, low quarter-wave voltage
  • High repetition rate
  • Wide optical bandwidth
  • High damaging threshold
  • No piezo-electric ringing
  • Application: Q-switches, pulse picking and EO modulator