DKDP & KDP Crystal Description
Kalium-Dideuterium-Phosphate (DKDP) and Kalium-Dihydrogen-Phosphate (KDP) are inorganic crystals used in optics and laser technology. They belong to the family of phosphate crystals. They share a number of characteristics yet differ in chemical composition and specific properties.
Both KDP and DKDP crystals are used because of their nonlinear optical properties. They are employed in various laser systems and optical devices. Their ability to convert and manipulate laser light is vital for scientific, industrial and military applications. The selection between KDP and DKDP is determined by factors such as the required wavelength, environmental conditions and the specific material properties needed for a particular application.
Specifications for DKDP and KDP Crystals
Angular Tolerance
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<10'
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Dimension Tolerance
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± (0,05 - 0,2) mm
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Flatness
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λ/8 @ 633nm
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Scratch/Groove Code
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20/10 scratches/depth according to MIL-O-13830A
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Parallelism
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better than 20 arcseconds
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Perpendicularity
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10 arcminutes
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Wavefront Distortion
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less than λ/8 at 633nm
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Clear Aperture
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> 90% central area
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Operating Temperature
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25°C
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Applications of DKDP & KDP Crystals
1. Frequency Conversion:
Both DKDP and KDP crystals are used for frequency conversion processes in lasers. They generate visible or ultraviolet light from infrared lasers. This technique is applied in laser research, material processing and medical applications.
2. Electro-optic Modulation:
DKDP and KDP crystals are used as electro-optic materials. They are employed in modulators in telecommunications, laser communication systems and signal processing.
3. Pockels Cells:
Pockels cells are optical devices that alter the polarisation state of light when an electric field is applied. DKDP and KDP crystals are used as the active medium in Pockels cells. They are used in laser systems, including Q-switch lasers for high-energy pulses, and in optical switches and beam-steering devices.
4. Optical Parametric Amplifiers (OPAs) and Oscillators (OPOs):
Both crystals are used in optical parametric amplifiers and oscillators. Their use enables the generation of tunable laser light for spectroscopy, microscopy and scientific research.
5. Laser Systems:
DKDP and KDP crystals are integral components of various laser systems. These include laser rangefinders, laser marking, laser welding and laser ablation systems.
6. Non-linear Optical Studies:
Researchers use DKDP and KDP crystals for non-linear optical studies. The studies examine the interaction between light and matter, quantum optics and quantum information processing.
7. Military and Defence Applications:
These crystals are used in military laser systems, laser rangefinders, target designators and countermeasure systems for defence and security purposes.
8. Biomedical Imaging:
In multiphoton microscopy and other biomedical imaging techniques, DKDP and KDP crystals contribute to the generation of high-energy, short-wavelength laser light for deep tissue imaging.