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An experiment of second harmonic generation in a nonuniform crystal is presented, and interpreted in terms of an autoresonant wave-mixing theory. A good agreement is found between numerical simulations, analytical solutions and experimental data.
We study soliton self-frequency shift initiated by an Airy pulse in an optical fiber. The asymmetric features associated with the pulse exhibiting leading or trailing oscillatory tails are revealed through the effect of Raman scattering.
We demonstrate nonparaxial Mathieu and Weber accelerating beams, generalizing the concept of previously found accelerating beams. Such beams bend into large angles along elliptical or parabolic trajectories but still retain nondiffracting and self-healing capabilities.
We propose and demonstrate a scheme to control the trajectories of single/multiple self-accelerating beams through analyzing the Fourier-space phase in both the paraxial and non-paraxial regimes. Our method is also applicable to vector self-accelerating beams.
A significant enhancement of the terahertz generation efficiency via two-color laser-induced air ionization, up to 10−3, is observed with increasing pump wavelength. Terahertz peak fields up to 4.4 MV/cm were obtained using 400 μJ pulse energy.
We show that high-intensity Airy pulses propagating in Kerr-type nonlinear media can preserve their self-accelerating features under appropriate conditions. By engineering the input pulses, controllable spectral shifting and reshaping are achieved.
We report a CMOS-compatible monolithic device for the amplitude and phase characterization of ultrafast optical pulses based on FWM, working up to 1THz bandwidth and 100ps time-duration thanks to a new phase-recovery algorithm for X-SPIDER.
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