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This article is cited in 4 scientific papers (total in 4 papers)
Nonlinear optical phenomena
Cascaded frequency doublers for broadband laser radiation
N. F. Andreeva, K. V. Vlasovaa, V. S. Davydova, S. M. Kulikovb, A. I. Makarova, S. A. Sukharevb, G. I. Freidmana, S. V. Shubina a Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod
b Federal State Unitary Enterprise "Russian Federal Nuclear Center — All-Russian Research Institute of Experimental Physics", Sarov
Abstract:
A new scheme of a cascaded converter of the first harmonic of broadband cw laser radiation into the second harmonic (SH) with compensation for the group walk-off in cascades is proposed and investigated. The conditions under which high conversion coefficients of broadband (~33 cm-1) single-mode fibre laser radiation with low peak power (~300 W) into the SH are determined for frequency doublers based on the most promising LBO crystal. Conversion of cw radiation with an average power of 300 W and efficiency η = 4.5 % into the SH is obtained in a single LBO crystal. Effect of coherent addition of SH radiation excited in different cascades is demonstrated for two- and three-stage schemes. The expected conversion efficiencies, calculated disregarding loss but taking into account real aberrations of elements, are 18 % and 38 %, respectively. The effect of pumping depletion begins to manifest itself in the third cascade of a three-stage converter; it may reduce the latter value to ~30 %.
Keywords:
second-harmonic generation, LBO crystal, angle-noncritical phase matching, spectral phase-matching width, cascaded frequency-doubling scheme, coherent field addition.
Received: 08.02.2012 Revised: 06.06.2012
Citation:
N. F. Andreev, K. V. Vlasova, V. S. Davydov, S. M. Kulikov, A. I. Makarov, S. A. Sukharev, G. I. Freidman, S. V. Shubin, “Cascaded frequency doublers for broadband laser radiation”, Kvantovaya Elektronika, 42:10 (2012), 887–898 [Quantum Electron., 42:10 (2012), 887–898]
Linking options:
https://www.mathnet.ru/eng/qe14829 https://www.mathnet.ru/eng/qe/v42/i10/p887
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