Deuterium material is a vital parameter for DKDP crystal, that's defined as the molar proportion of deuterium in the overall quantity of hydrogen atoms in the crystal lattice. The chemical and physical properties of DKDP crystals are hugely sensitive towards the deuteration volume of DKDP crystals, including lattice parameters, stage-changeover temperature, refractive index, optical properties16,forty two,forty three,forty four.
Consequently, the injury system is very intricate, and it really is urgent to find out the laser induced problems mechanism of KDP-loved ones crystals. On this paper, the cooperated investigation of Shanghai Institute of Optics and Mechanics with Fujian Institute of Research on the Construction of Subject, Shandong University as well as other crystal investigation institutes is reviewed. The laser induced harm Attributes of KDP and DKDP crystals applied as optical switching, frequency doubling and frequency mixing optical factors have been investigated. The optimization of crystal expansion course of action along with the Charge of crucial factors had been guided and the prevailing difficulties and remedies had been prospected. The study has reference value for the development of superior functionality KDP-family crystals and their rational software in substantial-electricity laser techniques.
The regularities of laser-induced damage are analyzed for LiNbO3 and KDP single crystals. It really is revealed that The form of damage during the dielectric crystals depends on the elastic symmetry of crystal along with the propagation way of laser beam. In the event the beam propagates together the optic axis of those crystals, the figures of laser harm are six-issue stars for LiNbO3 and four-place ones for KDP crystals.
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New plan of a petawatt laser depending on nondegenerate parametric amplification of chirped pulses in DKDP crystals
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In typical electric power lasers, the repetition-rate Pockels mobile is often employed as isolators and Q-
The area morphology, compositions, microstructures, and chemical bond vibrations of potassium dihydrogen phosphate (KDP) crystals induced by nanosecond laser with different wavelengths, at distinct Power density are studied by scanning electron microscopy (SEM) and infrared spectroscopy (IR) procedures. SEM outcomes confirmed that with the increase of laser Electricity density, the harm area on KDP surfaces introduced a few sections evidently. And the destruction place raises nonlinearly with the laser Strength density, accompanied by a rise in O element contents plus a lessen in P and K aspect contents.
Concurrently, the point-seed immediate advancement technology is used to grow DKDP crystals. In 1999, N. Zaitseva et al. built a ongoing filtration system for speedy crystal development which was made use of to get KDP and DKDP crystals with measurements approximately 55 cm30. Zhang et al. correctly employed issue-seed quick growth technological know-how to increase DKDP crystals which has a deuterium content material of 98%31,32. In 2019, Cai et al. claimed that a hugely deuterated DKDP crystal with measurements as much as 318 mm �?12 mm �?65 mm was developed from the speedy-advancement method33. This demonstrates that development because of the immediate growth approach not merely shortens The expansion period and also avoids the disturbance of monoclinic crystals, specifically for the growth of hugely deuterated DKDP crystals.
Components for instance mechanical deformation and temperature variations lead to section mismatch in optical parametric amplification units, impacting energy stability. A section payment method via the linear electro-optic impact can get over this limitation. Stage mismatch payment features were being simulated by means of the linear electro-optic effect in 70%-deuterated DKDP and ninety five%-deuterated DKDP. This method was placed on OPA techniques to confirm its feasibility.
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Both equally spectral approaches might be utilized to find out the deuterium written content of DKDP crystals with solution deuteration amount lower than 92%, although IR spectroscopy needs to be much more suitable to evaluate extra remarkably deuterated DKDP crystals.
switch to obtain superior output electric power. In the conventional Pockels mobile, a longitudinal electrical
The neutron scattering duration in the deuterium atom is larger than that of other atoms in DKDP crystal, so neutron diffraction can be used as a good approach to right figure out the deuterium written content of DKDP crystals50,51.