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- W1987321605 abstract "Computational study of nanosecond pulse laser radiation in periodically poled LiNbO<sub>3</sub> and LiTaO<sub>3</sub> crystals reveals the complex spacio-temporal evolution of the 1.064 μm fundamental harmonic (FH) and second harmonic (SH) energy fields with associated temperature fields, leading to the thermal dephasing and inhibition of second harmonic generation (SHG). The investigated range of the laser input power is W<sub>0</sub>=0.5-50 W (with the pulse energy Q<sub>0</sub>=0.01-1 mJ/pulse and repetition rate of 50 kHz). For input laser powers W<sub>0</sub>>10 W the FH and SH energy fields are found to strongly couple with non-uniform temperature field leading to significant thermal dephasing and SHG efficiency loss. Heat generation and temperature distributions also exhibit very significant non-uniformities along and across the laser beam, maximizing at the rear or inside the crystal, depending on the input power. Performed study shows the feasibility of the effective thermal control with temperature gradient along the crystal allowing one to maintain (i) the irradiated zone within the temperature tolerance range and (ii) high SHG efficiency under high input laser powers." @default.
- W1987321605 created "2016-06-24" @default.
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- W1987321605 date "2005-12-28" @default.
- W1987321605 modified "2023-10-01" @default.
- W1987321605 title "Pulsed laser second harmonic generation and thermal dephasing in periodically poled crystals" @default.
- W1987321605 doi "https://doi.org/10.1117/12.638211" @default.
- W1987321605 hasPublicationYear "2005" @default.
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