Cascaded frequency doublers for broadband laser radiation

Autor:	N F Andreev, Stanislav M. Kulikov, S. V. Shubin, Gennadii I Freidman, Stanislav A. Sukharev, K. V. Vlasova, A. I. Makarov, V S Davydov
Rok vydání:	2012
Předmět:	Physics business.industry Statistical and Nonlinear Physics Radiation Approx Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Crystal Optics Cascade Fiber laser Excited state Harmonic High harmonic generation Electrical and Electronic Engineering business
Zdroj:	Quantum Electronics. 42:887-898
ISSN:	1468-4799 1063-7818
DOI:	10.1070/qe2012v042n10abeh014829
Popis:	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 ({approx}33 cm{sup -1}) single-mode fibre laser radiation with low peak power ({approx}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 {eta} = 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 {approx}30 %. (nonlinear optical phenomena)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ec08b1f16f40540952a825bcd5ad5050 https://doi.org/10.1070/qe2012v042n10abeh014829 Zobrazit plný text záznamu