Sum and difference frequency generation of white light continuum with the ps pulses of Nd+3:YAG laser in a thick BBO crystal

Nautiyal, A.; Bisht, Prem B.

doi:10.1016/j.optcom.2007.05.067

Cited by 8 publications

(1 citation statement)

References 26 publications

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“…For example, second-and third-order harmonic generations [1,2], sumfrequency generation [3,4], multistep parametric processes [5], optical parametric amplification [6,7], anti-Stoke Raman scattering [8], and spatial solitons [9] have been observed experimentally. Meanwhile, when intense light propagates in a transparent medium including quadratic nonlinear crystals, modulation instability usually occurs due to the interplay of optical Kerr nonlinearity and group velocity dispersion or diffraction, producing an exponential growth of perturbations during photon-medium interactions [10].…”

Section: Introductionmentioning

confidence: 99%

Broadband colored-crescent generation in a singleβ-barium-borate crystal by intense femtosecond pulses

et al. 2011

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A visible colored crescent with a bandwidth broader than 220 nm is observed experimentally by loosely focused femtosecond pulses in a bulk quadratic nonlinear crystal (β-BBO crystal) at certain incident angles. Through the analysis based on a simple collinear phase-matching model, we suggest that the colored crescent might be the coexistence of spontaneous parametric down-conversions (SPDCs) in the infrared range and the corresponding efficient second-order harmonic generations (SHGs) that occur in a wide spectrum. We further provide a possible mechanism for the SHG process in which the phase-mismatching angles of the frequency doubling of SPDCs in β-BBO crystal are assumed to be compensated by the strong diffraction effect during the self-focusing process of the generated intense SPDC signals.

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