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DKDP Switch Crystal

POC-OC-122490-DKDP Switch Crystal

  • High optical transmission (>98%) across a wide wavelength range (200-2100 nm).
  • Exceptional electro-optic properties suitable for Q-switching and laser modulation.
  • High laser damage threshold (>750 MW/cm² at 1064 nm).
  • Low optical loss and excellent optical homogeneity.
  • Versatile applications in laser systems, including medical and industrial fields.

Customizable Components Available for This Material to Meet Your Specific Needs!

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DKDP Switch Crystal  Material General Description

DKDP (Potassium Dideuterium Phosphate) Switch Crystals, with the chemical formula KD₂PO₄, are widely recognized for their low optical losses, high extinction ratio, and superior electro-optic efficiency. These crystals are primarily used in electro-optic modulators, Q-switches, and frequency conversion systems. DKDP crystals feature excellent laser damage thresholds (>750 MW/cm²) and high transmission (>98%), making them ideal for low-repetition and high-energy laser applications. With a wide transparency range (200-2100 nm) and low absorption coefficient (0.006 cm⁻¹), DKDP crystals are a reliable choice for advanced laser technologies in industrial, medical, and research applications.

 

General Applications

DKDP Switch Crystals are primarily used in:

  • Electro-Optic Q-Switches: High-energy lasers for material processing and micromachining.
  • Frequency Conversion Systems: Second harmonic generation (SHG) and optical parametric oscillators (OPOs) for precision laser frequency doubling.
  • Laser Modulation: Pulse shaping and beam intensity modulation in research and medical laser systems.
  • Medical Lasers: Low-repetition lasers for non-invasive surgical and therapeutic applications.
  • Industrial Laser Systems: Cutting-edge laser technologies requiring precise beam control and frequency modulation.

For instance, in the field of laser eye surgery, DKDP Q-switch crystals are integral to high-precision laser scalpel systems. In industrial applications, they enhance productivity in micromachining by enabling efficient pulse shaping and beam energy modulation.

Chemical and Structural Properties

Property

Value

Chemical Formula

KD₂PO₄

Transparency Range

200-2100 nm

Nonlinear Coefficient

d₃₆ = 0.4 pm/V

Electro-Optic Coefficient

γ₄₁ = 8.8 pm/V, γ₆₃ = 25 pm/V

Half-Wave Voltage

V = 2.98 kV @ 546 nm, 6.4 kV @ 1064 nm

Absorption Coefficient

0.006 cm⁻¹

Damage Threshold

>750 MW/cm², 10 Hz, 10 ns @ 1064 nm

Optical, Laser and Nonlinear Optical Properties

Optical Property

Value

Refractive Index (at 1064 nm)

1.490

Electro-Optic Ratio

High extinction (>1000:1)

Laser Damage Threshold

>750 MW/cm²

Optical Homogeneity

High uniformity

Transparency Range

200-2100 nm

Standard Fabrication Specifications

Parameter

Specification

Optical Aperture

3-15 mm (effective diameter 85%)

Wavefront Distortion

<λ/8 @ 632.8 nm

Surface Quality

10-5 Scratch-Dig

Parallelism

<1 arc minute

Flatness

<λ/10 @ 632.8 nm

Damage Threshold

>750 MW/cm² @ 1064 nm

Spectrum Transmission Curve:

Note: Spectrum transmission data can be provided upon request. Please contact Photonics On Crystals (POC) for additional details or consult the comprehensive product catalog for more information.

Coating Specification:

POC offers high-quality anti-reflection coatings to enhance the performance of DKDP crystals:

  • AR Coating Range: 200-2100 nm
  • Typical Reflectance: <0.2%
  • Laser Damage Threshold: >750 MW/cm²

Customized coatings for specific wavelength ranges are available upon request.

  • Adhesion Test Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.

POC Strength and Capabilities

Photonics On Crystals (POC) specializes in the processing and customization of DKDP Switch Crystals for a wide range of applications:

  • Expertise in advanced fabrication techniques ensures superior crystal quality and optical performance.
  • Precision coatings tailored for high-power laser applications.
  • Customization services for non-standard dimensions and specific wavelength requirements.
  • Extensive quality control measures, including rigorous optical and physical property testing.

Standard Products

POC offers a range of standard DKDP Switch Crystal products. Customization options are also available upon request.

Product Code

Dimensions (mm)

Coating Option

Price (USD)

DKDP-001

10x10x5

AR @ 1064 nm

$1500

DKDP-002

15x15x10

AR @ 532 nm

$1800

DKDP-Custom

Customized Size

Custom Coating

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Note: Prices are approximate and subject to change based on customization and volume orders.

POC-OC-122490-DKDP Switch Crystal

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