skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Possibility of increasing the optical breakdown threshold in KDP crystals

Abstract

The effect of various technological factors like the direction of crystal growth [(100) or (101)], acidity of the mother solution, growth rate, degree of filtration of the mother solution, purity of the starting raw material, specially introduced impurity (Pb), as well as after-growth thermal annealing, on the optical breakdown threshold of KDP crystals grown by the technique of rapid growth of profiled crystals is studied. It is shown that by using initial high-purity salts and fine filtration of solutions followed by after-growth annealing, it is possible to increase the optical breakdown threshold of profiled rapidly grown KDP crystals to values corresponding to the requirements of modern laser designs. (laser devices and elements)

Authors:
; ; ; ;  [1]
  1. Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation)
Publication Date:
OSTI Identifier:
21466672
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 37; Journal Issue: 5; Other Information: DOI: 10.1070/QE2007v037n05ABEH013307
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANNEALING; BREAKDOWN; CRYSTAL DEFECTS; CRYSTAL GROWTH; CRYSTALS; DESIGN; LASERS; LEAD; PH VALUE; RAW MATERIALS; SOLUTIONS; CRYSTAL STRUCTURE; DISPERSIONS; ELEMENTS; HEAT TREATMENTS; HOMOGENEOUS MIXTURES; MATERIALS; METALS; MIXTURES

Citation Formats

Bredikhin, V I, Ershov, V P, Burenina, V N, Mal'shakov, A N, and Potemkin, A K. Possibility of increasing the optical breakdown threshold in KDP crystals. United States: N. p., 2007. Web. doi:10.1070/QE2007V037N05ABEH013307.
Bredikhin, V I, Ershov, V P, Burenina, V N, Mal'shakov, A N, & Potemkin, A K. Possibility of increasing the optical breakdown threshold in KDP crystals. United States. doi:10.1070/QE2007V037N05ABEH013307.
Bredikhin, V I, Ershov, V P, Burenina, V N, Mal'shakov, A N, and Potemkin, A K. Thu . "Possibility of increasing the optical breakdown threshold in KDP crystals". United States. doi:10.1070/QE2007V037N05ABEH013307.
@article{osti_21466672,
title = {Possibility of increasing the optical breakdown threshold in KDP crystals},
author = {Bredikhin, V I and Ershov, V P and Burenina, V N and Mal'shakov, A N and Potemkin, A K},
abstractNote = {The effect of various technological factors like the direction of crystal growth [(100) or (101)], acidity of the mother solution, growth rate, degree of filtration of the mother solution, purity of the starting raw material, specially introduced impurity (Pb), as well as after-growth thermal annealing, on the optical breakdown threshold of KDP crystals grown by the technique of rapid growth of profiled crystals is studied. It is shown that by using initial high-purity salts and fine filtration of solutions followed by after-growth annealing, it is possible to increase the optical breakdown threshold of profiled rapidly grown KDP crystals to values corresponding to the requirements of modern laser designs. (laser devices and elements)},
doi = {10.1070/QE2007V037N05ABEH013307},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 5,
volume = 37,
place = {United States},
year = {Thu May 31 00:00:00 EDT 2007},
month = {Thu May 31 00:00:00 EDT 2007}
}
  • Potassium dihydrophosphate single crystals were grown from aqueous solutions onto a point seed using temperature reduction method by doping with different molar values of urea. The characterization of the grown crystals was made by visible and Fourier transform infrared spectroscopy, Vicker's hardness studies, X-ray powder diffraction, non-linear optical and laser damage threshold measurements. By comparing these crystals with the ones grown from the pure solution, it is shown that 0.2-2.0 M of the urea additive enhances the laser damage threshold and the second harmonic efficiency more than by 25 and 20%, respectively. By means of the Bond method using amore » multipurpose three-crystal X-ray diffractometer it is shown that the presence of urea additive increases the crystal lattice parameter c of the grown crystals, whereas the lattice parameter a is by an order less sensitive to the changing urea concentration in the solution. The Vicker's hardness studies at room temperature carried out on (1 0 0) and (0 0 1) crystallographic planes show an increased hardness of the doped crystals (grown in the presence of urea additive) on the plane (0 0 1) in comparison with that of pure potassium dihydrophosphate crystal.« less
  • The ratio of the components of the third order nonlinear susceptibility tensors (which are responsible for the self-action effects) in KDP, DKDP and LiNbO{sub 3} crystals is measured at the 1064-nm wavelength of a Nd:YAG laser. Measurements were made on the basis of analysis of polarisation dependences of the focused radiation transmission by the z-scan method. The obtained polarisation dependences of the effective Kerr nonlinearity correspond to a tensor of the fourth rank that is symmetric in all its indices. The measured values of the Kerr nonlinearities that are responsible for the self-action of o-polarised radiation were found to bemore » (1.75 {+-} 0.55) x 10{sup -14} and (2.4 {+-} 0.8) x 10{sup -13} esu for KDP and LiNbO{sub 3} crystals, respectively. (nonlinear optical phenomena)« less
  • The features of doping of KDP crystals with cerium ions and organocerium complexes with alizarin complexon and arsenazo III have been investigated. It is established that 'direct' doping by introducing cerium salts into the initial solution cannot be implemented. The effect of organometallic complexes of cerium on the crystal growth has been studied. Organocerium complexes predominantly enter the prismatic or pyramidal growth sectors. It is shown that the complex arsenazo III + Ce blocks the growth of the prismatic sector. Cerium-doped KDP crystals exhibit a photoluminescence band peaking at the wavelength {lambda}{sub max}= 350 nm.
  • A multi-harmonic asymmetric cavity is predicted to sustain higher acceleration gradients than a conventional pillbox cavity, 55% higher in one example, when driven by external RF harmonic sources. Simulations of multi-harmonic excitation in such a cavity are described, either by a charged drive beam or by external RF sources. An accelerator structure based on multi-harmonic cavity is proposed.
  • A YAG:Nd/sup 3 +/ laser was passively Q-switched with the aid of an LiF crystal which contained F/sup -//sub 2/ color centers and was characterized by an initial transmission that varied across the crystal. Such switching reduced the angular divergence of the neodymium laser radiation to 2' without altering the energy characteristics. A method was developed for determining the initial transmission profile of a passive Q switch. An increase in the efficiency of the recovery of the F/sup -//sub 2/ color centers in an LiF crystal containing F/sub 2/ centers was observed under the simultaneous action of the second andmore » third harmonics of the neodymium laser radiation.« less