KDP/DKDP – Essential NLO Crystals for Laser Systems

Potassium Dihydrogen Phosphate (KDP) and Potassium Dideuterium Phosphate (DKDP) are highly regarded nonlinear optical (NLO) crystals, known for their exceptional performance in laser frequency conversion and electro-optic applications. Despite having relatively low NLO coefficients, their excellent UV transmission, high damage threshold, and high birefringence make them ideal for a variety of laser systems, particularly for doubling, tripling, and quadrupling Nd:YAG lasers at room temperature. Additionally, their excellent electro-optic properties make them suitable for applications such as Q-switches and Pockels cells.

Key Features and Benefits:

• High Damage Threshold: Both KDP and DKDP exhibit excellent damage thresholds (>3 GW/cm² for DKDP and >5 GW/cm² for KDP), ensuring long-lasting durability in high-power laser applications.
• UV Transmission: These crystals offer superior UV transmission (200-2100 nm for DKDP and 200-1650 nm for KDP), enabling a wide range of laser wavelength conversions.
• Electro-Optic Modulation: With high electro-optic coefficients, these crystals are ideal for electro-optic modulators such as Q-switches and Pockels Cells.
• Excellent Birefringence: Both KDP and DKDP possess high birefringence, providing precise control of polarization for laser systems.
• Tailored Crystal Selection: CASTECH offers a variety of sizes and configurations, ensuring optimal crystal selection based on specific laser parameters, and can provide additional services like polishing, coating, and sealed housing to preserve crystal integrity.

Applications:

• Laser Frequency Conversion: Perfect for doubling, tripling, and quadrupling Nd:YAG laser outputs.
• Electro-Optic Modulators: Widely used in devices such as Q-switches and Pockels Cells for precise control of laser pulses.
• High-Power Laser Systems: Essential in high-power laser systems where UV transmission and damage resistance are critical.
• Scientific Research and Medical Applications: Used in research, material processing, and medical diagnostic equipment.

CASTECH Advantages:

• Large-Scale Production: We supply high-quality KDP and DKDP crystals in large quantities, ensuring availability for diverse applications.
• Customized Services: CASTECH offers polishing, coating, and sealed housing services to ensure optimal performance and preservation of KDP and DKDP crystals in challenging environments.
• Expert Engineering Support: Our team will assist you in selecting and designing the best crystal based on your laser parameters, ensuring optimal system performance.

Basic Properties:

• Transparency Range: DKDP (200-2100 nm), KDP (200-1650 nm)
• Nonlinear Coefficients: d36 = 0.40 pm/V for DKDP, d36 = 0.44 pm/V for KDP
• Electro-Optic Coefficients: r41 = 8.8 pm/V, r63 = 25 pm/V for DKDP; r41 = 8.8 pm/V, r63 = 10.3 pm/V for KDP
• Damage Threshold: >3 GW/cm² for DKDP, >5 GW/cm² for KDP

CASTECH's KDP and DKDP crystals are essential components for a range of laser applications, offering high efficiency and reliability.