Affiliation:
1. Nanjing Normal University
2. Chinese Academy of Sciences
3. Nanjing Institute of Astronomical Optics & Technology
4. Shandong Normal University
5. Soochow University
Abstract
In this study, an analytical formula for the self-focusing length of a radially polarized beam (RPB) is first derived, which has a similar behavior to the semi-empirical Marburger formula of a Gaussian beam, and is beneficial to quantitatively and qualitatively analyze practical experimental scenarios. However, the relation of the self-focusing length with the states of polarization (SoPs) was evaluated, and it was found that RPB with spatially inhomogeneous SoP at the field cross-section can retain a further self-focusing length compared to a beam with a spatially homogeneous one. The influence of the topological charge on the self-focusing length is explored, which shows that RPB with a low topological charge can achieve a high-power density at a relatively further receiver plane. Therefore, it is demonstrated that the RPB as a laser source not only extends the self-focusing length, but also improves the power density of the target. With the help of RPB, it is possible to realize a controllable self-focusing length and a high target optical power density, which may have potential applications in fine optical manipulation, optical communication, high-power long-range laser atmospheric propagation, and related areas.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Innovation Group of Jinan
Local Science and Technology Development Project of the Central Government
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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