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27 May 1996 Correlation between laser and mechanical strength of KDP-type crystals
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Several mec1nisms o laser damage o waLer soluble KDP type crystals have been suggested by now, each of them corresponding to one or another aspect o a nonresonance interaction o radiation with material. However, no su.Uicient attention has been rocuseci on the correlation Q the laser damage threshold o crystals with other stn.icture — sensitive properties .The authors were rlrst to 1nc1 a correlation between laser and mechanical strength o DP and. KD*P crystals arid the way or their increase. The statistic processing of the results of measuring laser damage tbresholcl (W) and. fregile strength (a) for several tens of samples showed. a direct dependence between these two most important characteristics. For the KDP crystals doped with lead the rise of a I .5 times Is accompanied by the increase of W 3.7 times as compared with the undopeci ones. The crystals doped with chromium demonstrated the decrease of W almost by an order at a simu.ltaneou.s lowering of a I .7 times. The isothermal annealing of crystals near the temperature of the phase transition from the tetragorial modification to the rnonoclinic one results in both W and. a rise. An explanation of the mechanical strengthening of the material and. its correlation with laser damage threshold Is given in this paper.
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L. V. Atroschenko, Marina I. Kolybayeva, Vitaly I. Salo, and N. V. Khodeyeva "Correlation between laser and mechanical strength of KDP-type crystals", Proc. SPIE 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, (27 May 1996);

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