<title>Perspectives for creation of highly effective technology for fabricating KDP and KD*P crystals for ICF</title>

Abstract

Problems of creating high-efficiency technology of crystal KDP, DKDP blanks production for high-power lasers using the elaborated laboratory rapid-growth technology are considered. The laboratory technology enables one to grow crystal samples of the sizes and quality close to the requirements of the ICF laser drivers. The improved technology will provide samples completely satisfying the ICF demands. It is expected that the productivity ofthe developed technology will exceed the traditional one by an order, while the cost of samples will be essentially lower than in other technologies.

Realization of high efficiency and low damage machining of anisotropic KDP crystal by grinding

“…It is widely used in sonar and piezoelectric products, Q-switches, high speed photography shutters, electro-optical modulators, and frequency harmonic generation lens. Large size KDP crystal components with high surface form accuracy are required for making the Pockels cells in the Inertial Confinement Fusion (ICF) devices [1] . KDP is believed to be the most difficult-to-cut material, due to its delicate and unique characteristics including the combination of softness with brittleness, anisotropic performances, tendency for deliquescence and sensitivity to temperature change [2,3] .…”

Developing a novel binderless diamond grinding wheel with femtosecond laser ablation and evaluating its performance in grinding soft and brittle materials

“…Photoelectric crystals, such as potassium dihydrogen phosphate (KDP), potassium titanium oxide phosphate, and lithium niobate crystals (LiNbO3), are widely used in the semiconductor and laser industries due to their unique non-linear optoelectrical qualities. Bespalov et al (1997) used a rapid-growth technology to grow KDP 3 crystal samples with sizes and quality that are close to the requirements of inertial confinement fusion laser drivers. Randles et al (2008) presented a process technology to form thin diaphragms with sealed cavities in a LiNbO3 wafer.…”

Design of binderless grinding wheel with positive rake angle and fabrication used femtosecond laser ablation for grinding soft and brittle crystals

“…Optical crystal materials, such as KDP, KTP, and LN et al are widely applied in semiconductor and laser industries [1][2][3]. In particular, KDP is an irreplaceable optical element in the Inertial Confinement Fusion (ICF) devices, due to its large diameter and excellent non-linear opto-electronic characteristics [1]. However, because of their softness, brittleness and sensitivity to thermal loads, these crystals are recognized as the most difficult-to-cut materials.…”