Deuterium information is a vital parameter for DKDP crystal, and that is outlined because the molar percentage of deuterium in the whole variety of hydrogen atoms while in the crystal lattice. The chemical and Bodily Homes of DKDP crystals are highly sensitive into the deuteration amount of DKDP crystals, such as lattice parameters, phase-transition temperature, refractive index, optical properties16,42,forty three,44.
Therefore, the problems system is incredibly complicated, and it's urgent to find out the laser induced hurt mechanism of KDP-loved ones crystals. In this particular paper, the cooperated research of Shanghai Institute of Optics and Mechanics with Fujian Institute of Research over the Construction of Make a difference, Shandong University and other crystal research institutes is reviewed. The laser induced problems Qualities of KDP and DKDP crystals used as optical switching, frequency doubling and frequency mixing optical factors ended up investigated. The optimization of crystal expansion system as well as the control of key variables were being guided and the existing complications and methods were being prospected. The exploration has reference benefit for the development of large general performance KDP-family members crystals and their rational application in high-ability laser devices.
The regularities of laser-induced damage are studied for LiNbO3 and KDP solitary crystals. It can be demonstrated that the shape of harm within the dielectric crystals is determined by the elastic symmetry of crystal plus the propagation path of laser beam. Once the beam propagates alongside the optic axis of Those people crystals, the figures of laser damage are 6-issue stars for LiNbO3 and four-point types for KDP crystals.
For comparison, monoclinic DKDP crystals were being grown with the exact same Option. Surface morphologies of tetragonal and monoclinic DKDP crystals have been investigated by AFM system. The several growth patterns among tetragonal and monoclinic DKDP crystals were being analyzed Based on their crystal structures with bond valence model.
discharge voltage mostly decreases, but it's nevertheless better compared to the fifty percent-wave voltage in the
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Also, the intensity with the strongest peak of those crystals decreases first, and reaches the minimum amount price though the mole percentage of your deuterium content in the crystal is about seventy four%. Following that, the depth will increase with the increase of your deuterium concentration from the crystal.
Investigation of bulk laser injury in KDP crystal as a purpose of laser irradiation path, polarization, and wavelength
Meanwhile, at the exact same energy density, the hurt spot induced through the 355 nm nanosecond laser is much bigger than that with the 1064 nm nanosecond laser. Infrared spectrum final results exposed the laser irradiation brings about a crack in hydrogen click here bonds as well as a dehydration of KDP crystals, at the side of a era of P=O and P-H bonds. Moreover, with the increase with the laser Vitality density, the KDP crystal is damaged To start with, after which is annealed and fixed, last but not least is ruined once more. In addition, soon after irradiation at 10 J/cm ² , all vibration modes of KDP crystals weaken or maybe vanish, plus the sever destruction takes place.
The deuterium homogeneities of large-measurement DKDP crystals developed by standard advancement strategy and rapid expansion method had been investigated in situ by Raman spectroscopy, respectively37,53. The final results indicated which the inhomogeneity of deuterium content material was estimated for being 0.
Nonlinear deuterated potassium dihydrogen phosphate (DKDP) and KDP crystals can be used for a number of programs because of their massive nonlinear optical and electro-optical coefficients.
In nonlinear optics these crystals are mostly utilized as the second, third, and fourth harmonic generators for Nd:YAG and Nd:YLF lasers.
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The experiment results above reveal that it's inadequate to generate the PPC Using the