Experimental research on the phenomenon of light branch and its influencing factors

Junxi Guo; Tianyuan Wang; Dongqiong Wu; Jifeng Fan; Wenbo Li

doi:10.1117/12.2648965

14 October 2022 Experimental research on the phenomenon of light branch and its influencing factors

Junxi Guo, Tianyuan Wang, Dongqiong Wu, Jifeng Fan, Wenbo Li

Proceedings Volume 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022); 1234321 (2022) https://doi.org/10.1117/12.2648965
Event: 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 2022, Qingdao, China

Abstract

The phenomenon of branch is often caused by the propagation of matter through uneven media. In the field of optics, it was first discovered in recent years that this phenomenon can be caused by laser beam propagation in soap film media. Soap film media can be regarded as a special "film" due to its fluidity and other characteristics. In this paper, the phenomenon are explained theoretically from two parts: geometry optics and wave optics. Analogy of electromagnetic field, on the basis of the theory of optical waveguide, the theory of electrodynamics and Maxwell's equations for the theoretical interpretation of the phenomenon, and found that the phenomenon means that the light incidents into a medium with a randomly varying refractive index and occurs diffraction, which is due to weak correlation potential function changes caused by wave deflection caused by caustic. Then it is verified through experiments. Finally, it is concluded that the laser beam remains collimated before each bifurcation, and the first bifurcation point is located at the maximum potential energy difference of media. The essence of this phenomenon is influenced by film’s potential intensity and correlation length, incident coherent wavelength and external environment. The soap film concentration, shape and different positions of incident soap film will affect the change of film thickness, which further affects its potential intensity and correlation length. The greater the potential intensity and correlation length results in the more obvious the branching flow phenomenon within a certain range. Beyond this range, the branching flow phenomenon will not occur.

Citation Download Citation

Junxi Guo, Tianyuan Wang, Dongqiong Wu, Jifeng Fan, and Wenbo Li "Experimental research on the phenomenon of light branch and its influencing factors", Proc. SPIE 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 1234321 (14 October 2022); https://doi.org/10.1117/12.2648965

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KEYWORDS

Refractive index

Laser beam propagation

Spherical lenses

Molecules

Electromagnetism

Mechanics

Wave propagation

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