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    DKDP - Deuterated potassium dihydrogen phosphate - 3photon.com
    KDP (Potassium Dihydrogen Phosphate) and DKDP (Potassium Dideuterium Phosphate) crystals are vital electro-optic materials used in Q-switching for lasers, acting as Pockels cells to rapidly modulate laser light, allowing high-energy pulses by controlling light transmission through an applied voltage. DKDP, with deuterated hydrogen for improved properties, offers higher electro-optic coefficients and better performance (e.g., lower thermal lensing, higher damage threshold) than KDP, making it ideal for powerful pulsed lasers in medicine, industry, and research, though both are hygroscopic, requiring sealed protection. 
    How They Work in Q-Switching 
    • Electro-Optic Effect: When voltage is applied, these crystals change their refractive index, altering light polarization.
    • Energy Storage: During laser pumping, the crystal is set to block light (high loss), storing energy in the laser medium.
    • Pulse Generation: A rapid voltage change (often a fast electrical pulse) makes the crystal transparent, releasing a short, powerful laser pulse. 
    Key Differences: KDP vs. DKDP 
    • Composition: KDP is Potassium Dihydrogen Phosphate; DKDP (or KD*P) replaces hydrogen with deuterium, creating Deuterated Potassium Dihydrogen Phosphate.
    • Performance: DKDP generally has superior electro-optic coefficients, lower optical loss, better stability, and higher damage thresholds, making it preferred for high-power applications. 
    Common Applications & Characteristics 
    • Pockels Cells: Used as the core component in Pockels cells for Q-switching and pulse picking.
    • Laser Types: Used with Nd:YAG, Ti:Sapphire, and other solid-state lasers.
    • Advanced Features: Available in large apertures, good UV transmission, high birefringence, and can be AR-coated.
    • Hygroscopic Nature: Both absorb moisture, necessitating sealed housings (e.g., with windows) to maintain performance. 
    • KDP/DKDP Crystals & Applications - OptoCity
      Oct 15, 2025 — DKDP crystal Potassium Dideuterium Phosphate (KD*P or DKDP) is isomorph of KDP. The main advantage of DKDP is its high...
      OptoCity
    • DKDP (KD*P) Crystals - Shalom EO
      In addition, Potassium Dideuterium Phosphate crystals also inherit high electro-optic coefficients, making them excellent for bein...
      Shalom EO
    • Non-linear crystal, KDP/DKDP crystals - zokoptics
      Nov 14, 2024 — Non-linear crystals, KDP/DKDP crystals KDP/DKDP crystals(KDP crystal and DKDP crystals) are 2 type of Non-linear cryst...
      zokoptics
    • DKDP & KDP Crystal - NLO Crystal - Stanford Advanced Materials
      In Q-switching, DKDP and KDP crystals function as electro-optic modulators that control the release of laser energy. Their high tr...
      Stanford Advanced Materials
    • DKDP (KD*P) Crystal Properties - Shape Optics
      Description: Potassium Dideuterium Phosphate (DKDP or KD*P) crystals are well-known for their low optical loss, high extinction ra...
      Shape Optics Technologies Pte Ltd
    • KDP, DKDP Crystals | Altechna - Custom Laser Optics & Technologies
      KDP, DKDP – Nonlinear crystals In electro-optical applications, DKDP crystals are a fairly common choice for Pockels cell producti...
      Altechna
    • DKDP - Deuterated potassium dihydrogen phosphate - 3photon.com
      Compatible with a broad range of pumping sources. * Hygroscopic (moisture affects DKDP immediately). * The material is soft, makin...
      3photon.com
    • Q Switching - an overview | ScienceDirect Topics
      Q-switching is defined as a technique used in solid-state lasers to generate short pulses by initially maintaining high resonator ...
      ScienceDirect.com
    • KDP/DKDP Crystals & Applications - OptoCity
      Oct 15, 2025 — DKDP crystal Potassium Dideuterium Phosphate (KD*P or DKDP) is isomorph of KDP. The main advantage of DKDP is its high...
      OptoCity
    • DKDP (KD*P) Crystals - Shalom EO
      In addition, Potassium Dideuterium Phosphate crystals also inherit high electro-optic coefficients, making them excellent for bein...
      Shalom EO
    • Non-linear crystal, KDP/DKDP crystals - zokoptics
      Nov 14, 2024 — Non-linear crystals, KDP/DKDP crystals KDP/DKDP crystals(KDP crystal and DKDP crystals) are 2 type of Non-linear cryst...
      zokoptics
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    Electro-Optical/Q-switching application


    EKSMA Optics
    https://eksmaoptics.com › out › media › EKSMA_...
    EKSMA Optics
    https://eksmaoptics.com › out › media › EKSMA_...
    PDF
    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 ...Read more
    2 pages

    KDP, DKDP Crystals


    Altechna
    https://www.altechna.com › products › nonlinear-crystals
    Altechna
    https://www.altechna.com › products › nonlinear-crystals
    In electro-optical applications, DKDP crystals are a fairly common choice for Pockels cell production and they also can be used as Q-switches for Nd:YAG, Nd:YLF ...Read more

    DKDP & KDP Crystal - NLO Crystal - SAM


    Stanford Advanced Materials
    https://www.samaterials.com › nlo-crystals › 498-dkdp-k...
    Stanford Advanced Materials
    https://www.samaterials.com › nlo-crystals › 498-dkdp-k...
    Q3 How are DKDP and KDP crystals used in Q-switching? In Q-switching, DKDP and KDP crystals function as electro-optic modulators that control the release ...Read more
    Starting from $100.00 · In stock

    KDP/KD*P Crystals


    Newlight Photonics Inc.
    https://www.newlightphotonics.com › KDP-DKDP-Crystals
    Newlight Photonics Inc.
    https://www.newlightphotonics.com › KDP-DKDP-Crystals
    KDP (Potassium Dihydrogen Phosphate) and KD*P (Potassium Dideuterium Phosphate) are useful commercial NLO materials for doubling, tripling and quadrupling of ...Read more

    KDP, DKDP Crystals


    4Lasers
    https://4lasers.com › ... › Crystals › Nonlinear crystals
    4Lasers
    https://4lasers.com › ... › Crystals › Nonlinear crystals
    DKDP and KDP are known as analogs, though their properties differ due to DKDP deuteration. They both exhibit excellent ultraviolet transmission and high damage ...Read more

    DKDP Crystal: "Brilliant and Enduring"


    CASTECH Inc.
    https://www.castech.com › news_detail
    CASTECH Inc.
    https://www.castech.com › news_detail
    Nov 19, 2025 — Owing to its exceptional performance, DKDP crystals are widely used in intracavity Q-switching, high-speed optical shutters, pulse picking, and ...Read more

    Guide to the KD*P Q-Switch


    IL Photonics
    https://ilphotonics.com › guide-to-the-kdp-q-switch
    IL Photonics
    https://ilphotonics.com › guide-to-the-kdp-q-switch
    Jan 13, 2025 — KD*P stands for potassium dihydrogen phosphate, which is the crystal used in the Q-switch. The KD*P Q-switch works by utilizing the properties ...Read more

    KDP Pockels Cell for Laser Q-Switching and Modulation


    FindLight
    https://www.findlight.net › ... › Electro-Optics › EOM
    FindLight
    https://www.findlight.net › ... › Electro-Optics › EOM
    The higher deuterium content in the KD*P crystal not only improves its electro-optical properties but also broadens its light transmission range, offering a ...Read more
    6-day delivery · 30-day returns

    OST Photonics KDP Crystals/DKDP Laser Nonlinear Crystals


    Jiaxing AOSITE Photonics Technology Co.,Ltd.
    https://www.ostphotonics.com › ... › Nonlinear Crystals
    Jiaxing AOSITE Photonics Technology Co.,Ltd.
    https://www.ostphotonics.com › ... › Nonlinear Crystals
    KDP crystals and DKDP crystals are commonly used for doubling, tripling and quadrupling of Nd:YAG laser at the room temperature. In addition, KDP crystals and ...Read more

    KDP and DKDP for electro optical Q switch


    HG Optronics.,INC.
    https://www.hgoptronics.com › kdp-and-dkdp-for-elect...
    HG Optronics.,INC.
    https://www.hgoptronics.com › kdp-and-dkdp-for-elect...
    They are usually used for doubling, tripling and quadrupling of a Nd:YAG laser under the room temperature. In addition, they are also excellent electro-optic ...Read more

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