Journal ArticleDOI
The second harmonic component in the Bessel beam
Desheng Ding,Zuhong Lu +1 more
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TLDR
In this paper, the authors derived analytical and approximate solutions for the second harmonic component in the Bessel nondiffracting beam, based on the Khokhlov-Zabolotskaya-Kuznetsov wave equation.Abstract:
The analysis is based on the Khokhlov–Zabolotskaya–Kuznetsov wave equation. Analytical and approximate solutions are derived for the second harmonic component in the Bessel nondiffracting beam. The theoretical results indicate that the second harmonic beam is nearly nondiffracting in the radial direction and the pressure amplitude is proportional to the square root of propagation distance in the quasilinear approximation, and that the beamwidth of the second harmonic is just 1/2 times that of the fundamental component in the Bessel field, not as 1/√2 times in the fields radiated by other sources.read more
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Journal ArticleDOI
Interference of traveling nondiffracting beams
TL;DR: Numerically the interference resulting from the superposition of two Bessel beams propagating in free space is studied and the existence of the self-imaging effect during propagation is shown.
Journal ArticleDOI
Experimental observation of interfering Bessel beams
Sabino Chávez-Cerda,Eduardo Tepichin,Antonio Meneses-Nava,Gustavo Ramírez,Jandir M. Hickmann +4 more
TL;DR: This work experimentally verified the interference resulting of the superposition of two Bessel beams propagating in free space and showed for first time the self imaging effect using nondiffracting beams.
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Modeling of wave propagation for medical ultrasound: a review
Juanjuan Gu,Yun Jing +1 more
TL;DR: The literature and technical review of recent progress on numerical modeling of medical ultrasound is provided and future challenges will also be discussed.
Journal ArticleDOI
A flat acoustic lens to generate a Bessel-like beam.
TL;DR: A flat acoustic lens with a periodical structure to transform a divergent beam into a Bessel‐like beam and the results indicated that the transmitted acoustic intensity at the central axis was several times greater with the lens than without it.
Journal ArticleDOI
Gain-guided modes in stimulated scattering processes with diffraction-free pump beams
TL;DR: In this article, the paraxial wave equation for stimulated scattering with a diffraction-free pump beam and obtained gain-guided Stokes modes as solutions were solved and demonstrated experimentally using stimulated Raman scattering in H 2 gas with a quasi-diffraction free Bessel pump beam.