Sum-frequency generation in disordered quadratic nonlinear media

Sibbers, Fabian; Imbrock, Jörg; Denz, Cornélia

doi:10.1117/12.855885

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…This represents the second harmonics in the visible range of the pulse spectrum. The spectral broadening due to the self-phase modulation is also clearly seen [24]. These different intensity maxima are classified and marked, depending on the polarization of the individual signals.…”

Section: 2čerenkov Type I and Ii Shg Analyzing Setupmentioning

confidence: 90%

Simultaneous type I and type II Čerenkov-phase matched second-harmonic generation in disordered nonlinear photonic structures

et al. 2015

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Section: 2čerenkov Type I and Ii Shg Analyzing Setupmentioning

confidence: 90%

Simultaneous type I and type II Čerenkov-phase matched second-harmonic generation in disordered nonlinear photonic structures

et al. 2015

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“…DOI: 10.1088/0256-307X/41/1/014204 Quadratic [𝜒 (2) ] nonlinear effects are widely leveraged in a variety of fields, including physics, [1,2] chemistry, [3] materials science, [4,5] optics, [6][7][8] communications, [9] and so on. The 𝜒 (2) nonlinear effect refers to the fact that in the field of optics, when the light intensity is sufficiently large, the electric field of light has a 𝜒 (2) effect on the polarizability of the medium, resulting in optical frequency conversion processes such as second harmonic generation, [10][11][12] sum frequency generation, [13,14] difference frequency generation, [15][16][17] and optical parametric amplification. [18][19][20] This effect is widely used in the frequency conversion processes in optical fields, [21][22][23] such as laser frequency doubling, electro-optical modulation, optical storage, and optical switching.…”

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confidence: 99%

Three-Wave Mixing of Dipole Solitons in One-Dimensional Quasi-Phase-Matched Nonlinear Crystals

Guo 郭,

Xu 徐,

Chen 陈

et al. 2024

Chinese Phys. Lett.

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In this paper, a quasi-phase-matched (QPM) technique is introduced for soliton transmission in a quadratic (x (2)) nonlinear crystal to realize stable transmission of dipole solitons in one-dimensional (1D) space under three-wave mixing. We report four types of solitons as dipole solitons with distances between their bimodal peaks that can be laid out in different stripes. We study three cases of these solitons: spaced three stripes apart, one stripe apart, and confined to the same stripe. For the case of three stripes apart, all four types have stable results, but for the case of one stripe apart, stable solutions can only be found at w 1 = w 2, and for the condition of dipole solitons confined to one stripe, stable solutions exist only for Type1 and Type3 at w 1 = w 2. The stability of the soliton solution is solved and verified using the imaginary time propagation (ITP) method and real-time transfer propagation (RTP), and soliton solutions are shown to exist in the multistability case. In addition, the relations of the transportation characteristics of the dipole soliton and the modulation parameters are numerically investigated. Finally, possible approaches for experimental realization of the solitons are outlined.

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Second harmonic generation in multi-domain χ^2 media: from disorder to order

2011

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We investigate systematically the evolution of second harmonic generation in strontium barium niobate with different degrees of disorder of its χ2 nonlinearity. These different degrees of disordered domain structures are achieved through electrically switching of the polarization at room temperature. The size and distribution of the domains change during the poling process and this in turn strongly affects the spatial distribution of the second harmonic signal. The degree of disorder can be determined by analyzing the angular distribution and wavelength dependence of the second harmonic emission patterns combined with measurements of the spontaneous polarization. We demonstrate evidence of the control of the second harmonic emission pattern by creating defined states of order, and successfully reproduce the resulting patterns theoretically.

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Sum-frequency generation in disordered quadratic nonlinear media

Cited by 5 publications

References 27 publications

Simultaneous type I and type II Čerenkov-phase matched second-harmonic generation in disordered nonlinear photonic structures

Simultaneous type I and type II Čerenkov-phase matched second-harmonic generation in disordered nonlinear photonic structures

Three-Wave Mixing of Dipole Solitons in One-Dimensional Quasi-Phase-Matched Nonlinear Crystals

Second harmonic generation in multi-domain χ^2 media: from disorder to order

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