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Potassium Dideuterium Phosphate and its Isomorphs - KDP, KD*P (DKDP) Crystals

Potassium Dideuterium Phosphate and its Isomorphs - KDP, KD*P (DKDP) Crystals Applications:
  • Laser frequency conversion – harmonic generation for high pulse energy, low repetition (<100 Hz) rate lasers;
  • Electro-optical modulation;
  • Q-switching crystal for Pockels cells;

Electro-Optical/Q-switching application:
  • EKSMA OPTICS offers highly deuterated D>96%  electro-optic (e/o) crystal - DKDP  for Q-switching application;
  • Standard dimensions of electro-optic (e/o) DKDP crystals for Q-switching are cylinders dia 9 x 20 mm and dia 12 x 24 mm however manufacturing of custom size and rectangular shape crystals is available;
  • Gold evaporated or silver paste electrodes are available;
  • Dielectric thin film AR coatings for specified laser wavelengths are available;
  • Typical quarter wave voltage 3.4 kV at 1064 nm;
  • Typical contrast ratio between crossed polarizers better than 1:2000;
  • Damage threshold of AR coated DKDP surface >5 J/cm2 at 1064 nm, 10 ns pulses.

Frequency conversion applications:
  • DKDP crystals are used for second harmonic generation of high pulse energy low repetition rate (<100Hz) Q-switched and mode-locked Nd:YAG lasers. Cut angle of crystal for operation at room temperature is 36.6 deg for Type 1 phase matching and 53.7 deg for Type 2 phase matching.
  • DKDP crystals are used for third harmonic generation of high pulse energy Q-switched and mode-locked Nd:YAG lasers via sum frequency generation. Cut angle of crystal for operation at room temperature is 59.3 deg for Type 2 phase matching.
  • Type 1 DKDP crystals with non-critical cut angle theta=90 deg are used for fourth harmonic generation (532nm → 266nm) of high pulse energy Q-switched and mode-locked Nd:YAG lasers. Crystal must be heated at ~50 deg C temperature to match NCPM conditions.
  • Type 1 KDP crystals with close to non-critical cut angle theta=76.5 deg are used for fourth harmonic generation (532nm → 266nm) of high pulse energy Q-switched and mode-locked Nd:YAG lasers. KDP has lower absorption at UV wavelengths comparing to DKDP.
  • KDP thin crystals are used for second harmonic generation of Ti:Sapphire laser radiation or pulse duration measurement in single shot autocorrelators. KDP possesses ~2.4 times larger spectral acceptance and correspondingly smaller group velocity mismatch comparing to BBO crystal for SHG of 800 nm, what sometime is very critical parameter for femtosecond wide spectrum pulses. 
  • KDP crystals can be supplied by EKSMA OPTICS of aperture up to dia 80 mm. Actually KDP remains the only solution for harmonic generation of very high intensity femtosecond Ti:Sapphire lasers featuring sub-tera Watt or tera Watt peak power pulses in large >30 mm diameter beams.  
KDP, DKDP Harmonic Generation Crystals

Delivery: 2 business days
Code Size, mm θ φ Coating Application Item price, USD In stock Add to cart
DKDP-401 15x15x13 36.5 45 AR/AR@1064+532 nm SHG@1064 nm, Type 1 595.- In stock Add to cart
DKDP-402 15x15x13 53.5 0 AR/AR@1064+532 nm SHG@1064 nm, Type 2 595.- In stock Add to cart
DKDP-403 12x12x20 59.3 0 AR/AR @ 1064+532 / 355nm THG @ 1064 nm, Type 2 585.- In stock Add to cart
DKDP-404 12x12x20 53.5 0 AR/AR@1064/1064+532 nm SHG@1064 nm, Type 2 585.- In stock Add to cart
DKDP-405 15x15x20 53.5 0 AR/AR@1064/1064+532 nm SHG @ 1064 nm, Type 2 700.- In stock Add to cart
DKDP-406 15x15x20 59.3 0 AR/AR@1064+532/355 nm THG@1064 nm, Type 2 700.- In stock Add to cart
KDP-401 12x12x5 76.5 45 AR/AR@532/266 nm SHG@532 nm, Type 1 500.- In stock Add to cart
KDP-402 15x15x7 76.5 45 AR/AR@532/266 nm SHG@532 nm, Type 1 575.- In stock Add to cart
All prices are FCA Vilnius.
Prices are valid only for direct orders. For orders via distributors contact them directly.
DKDP Q-Switching Crystals
Code Size, mm θ φ Coating Application Item price, USD In stock Add to cart
DKDP-412 dia 12x24 0 0 uncoated* Electro-Optical/Q-switching Request Request Add to cart
DKDP-409 dia 9x20 mm 0 0 uncoated* Electro-Optical/Q-switching Request Request Add to cart
*AR coatings@1064 nm are available on request
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