Microhardness, laser damage threshold and SHG efficiency studies of potassium dihydrogen phosphate crystals doped with L-arginine amino acid

Abstract

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Effect of L-arginine-phosphate doping on structural, optical and strength properties of KDP single crystal

“…Pure and doped KDP single crystals were grown from aqueous solutions (рН4.0 ± 0.1) onto a point seed measuring 5×5×10 mm by the temperature lowering method in a 6.0-L crystallizer at a saturation temperature of 50 °C as described in [9,10]. LAP (C 6 H 14 N 4 O 2 H 3 PO 4 •H 2 O) was used for doping KDP crystals at the concentrations 0.2, 0.5, 1.0, 2.2 and 4.4 wt.% in the mother liquor (on the weight of KH 2 PO 4 salt).…”

“…The laser-induced damage threshold (LIDT) and Vicker's microhardness (H V ) of the samples of pure KDP and KDP:LAP crystals were studied as described in [9,10]. LIDT was investigated at the fundamental wavelength of YAG:Nd 3+ laser operating at λ = 1.06 µm.…”

“…The NLO properties of the crystals were studied using YAG:Nd 3+ laser at λ = 1.064 µm as described in [10] (with 1 Hz pulse frequency, 7 ns pulse duration, 1 mm laser beam diameter). The samples of pure and doped KDP crystals were cut off at the phase matching angle θ = 59° (Type II, oee) from {101} and {100} growth sectors.…”