The evolution of Airy beam intensity distribution in turbulence is examined. Results show that the centroid position and skewness of an Airy beam are independent on turbulence. When the exponential truncation factor is small, an Airy beam has a long tail on the left side. When the exponential truncation factor is larger than 1, an Airy beam can be approximately expressed by an off-axis Gaussian beam. If the effect of turbulence is large enough, the Airy beam converges to a Gaussian distribution. However, the convergence is slower for a small exponential truncation factor than for a large one. That is, an Airy beam with a smaller exponential truncation factor exhibits more resilience against perturbations of turbulence than does a larger one.
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http://dx.doi.org/10.1364/OL.36.002701 | DOI Listing |
Light Sci Appl
February 2025
School of Electrical Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel.
It is commonly assumed that nonlinear frequency conversion requires lasers with high coherence; however, this assumption has constrained our broader understanding of coherence and overlooked the potential role of incoherence in nonlinear interactions. In this work, we study the synthesis of optical spatial coherence in second harmonic generation using quadratic nonlinear photonic crystals. We demonstrate a method where the second harmonic coherence is customized by employing quantitative phase retrieval and a complex square-root filter sequentially on fundamental frequency speckles.
View Article and Find Full Text PDFSci Rep
February 2025
College of Computer Science and Electronic Engineering, Hunan University, Changsha, 410082, China.
Multi-object imaging can obtain more comprehensive information to analyze the surrounding environment better and is widely used in many fields. While most multi-object imaging methods require objects not to be coaxial, which must ensure that each object is within the line-of-sight (LOS) of beam progression. In this paper, we present an approach for imaging multiple coaxial objects utilizing an Airy beam array, which can see hidden objects and is conducive to expanding the range of information perception.
View Article and Find Full Text PDFJ Opt Soc Am A Opt Image Sci Vis
December 2024
In this paper, the focusing characteristics of a circular Airyprime Gaussian beam (CAPGB) propagating in a gradient refractive index (GRIN) medium is studied for the first time, to the best of our knowledge, and some interesting features are observed. We find that the CAPGB exhibits periodic focus-defocus behavior and completes a period propagation process with two focal points within a half variation period /2 of the GRIN medium. Meanwhile, the CAPGB has singularity at the positions of =(2+1)/4 on the optical axis.
View Article and Find Full Text PDFJ Opt Soc Am A Opt Image Sci Vis
September 2024
By combining the improved properties of the Bessel modulated autofocusing beam [Phys. Rev. A104, 043524 (2021)PLRAAN1050-294710.
View Article and Find Full Text PDFThe transmission dynamics of a circular Airy beam (CAB) with quadratic phase modulation (QPM) and cross-phase modulation (XPM) in the cubic-quintic nonlinear fractional Schrödinger equation (FSE) optical system is investigated. In the linear case, the energy distribution of the beam is affected by XPM and the focusing position of the beam is influenced by QPM. CAB undergoes splitting and its intensity is shifted as the absolute value of the XPM coefficient (||) increases.
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