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G&H growing electro-optical crystals - A collection of polished electro-optical crystal boules arranged on a dark surface. The transparent, cylindrical crystals have glossy finishes and unique internal reflections, indicating high purity and precision for use in advanced optical or photonic applications.

Potassium Dihydrogen Phosphate Crystals (KDP)

G&H Potassium Dihydrogen Phosphate (KDP) crystals offer excellent electro-optic and nonlinear optical properties, ideal for Pulse picking, Q-switching, harmonic generation, and Pockels cell applications.

Full Product Description
Pulse Picker:
Yes
Q-switching:
Yes

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Product description

The KD*P family exhibits strong electro-optic coefficients and broad transparency. KDP is a widely used nonlinear optical crystal known for its excellent UV transparency and efficient second harmonic generation. It is also commonly employed in pulse pickers, Q-switching and Pockels cell applications due to its favorable electro-optic coefficients. G&H grows high-purity KDP crystals and offers both raw crystals and custom assemblies for demanding scientific and industrial applications.

Typically used in Pockels cells and Q-switches for medical and aesthetic lasers, due to their high electro-optic coefficients.

Crystal boules also available, we cultivate and offer structurally flawless large boules devoid of defects, striations, or inclusions. Our boules boast an exceptionally low dislocation density, with sections entirely free of dislocations. With our oversized boules, we're capable of crafting exceptionally large optical elements.

Key features

  • Large-aperture growth capability (up to 420 mm)
  • Precision slicing and polishing
  • AR-coated and custom-mounted assemblies
  • Low wavefront distortion for high beam quality
  • XTP assemblies available for ultrathin applications
  • Crystal boules available

Related Products

  • XTP Series – Thin Crystal Assemblies for KDP
  • Custom cut angle for phase matching
  • Large format harmonic generation kits
  • Pockels Cells

Specifications

NameValue
Crystal TypePotassium Dihydrogen Phosphate (KDP)
Crystal StructureTetragonal
Point Group Structure4(Bar)2m
Transparency Range0.2 – 1.5 µm
Nonlinear CoefficientD63 = 0.39 pm/V
Electro-optic Coefficientr63 ≈ 10 pm/V
Damage threshold>10 GW/cm² (1064 nm, 10 ns, 1 mm diameter)
Wavefront distortion< λ/10
CoatingSolGel AR , Vacuum Dielectric
Pulse PickerYes
Q-switchingYes

Applications

  • Frequency doubling and tripling (SHG/THG)
  • Electro-optic modulators and Pockels cells
  • High-power laser systems
  • Ultrafast laser research
  • Scientific instrumentation
  • Large aperture off-axis zero-order waveplates
  • Pulse Picker
  • Q-switching