Mitigating thermal blooming effect of seawater using self-rotating beam

Zhong, Zheqiang; Qiu, Die; Zhang, Bin

doi:10.1016/j.optcom.2022.129215

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Comprehensive studies have indicated that the propagation of a laser beam can be negatively impacted by atmospheric thermal blooming, resulting in detrimental distortions, a dissipation of energy, and a degradation in beam quality. Understanding and mitigating thermal blooming effects are the keys to optimizing the propagation performance of high-power laser beams [14]. In recent years, numerous novel laser modes have emerged, including the power-exponent-phase vortex (PEPV) beam.…”

Section: Introductionmentioning

confidence: 99%

Thermal Blooming Effect of Power-Exponent-Phase Vortex Beams Propagating through the Atmosphere

Zhang,

Hou,

Zhang

et al. 2023

Photonics

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The thermal blooming effect of power-exponent-phase vortex (PEPV) beam propagating in the atmosphere is investigated by employing the multiple phase screen method. The influences of propagation distance, topological charge, power exponent, wind speed, and absorption coefficient on thermal blooming effect are analyzed in detail. The results show that (1) the thermal blooming effect exhibits a significant perturbation on the intensity and phase distribution of PEPV beams, with its influence becoming more pronounced as the propagation distance increases; (2) when the power exponent is fixed at 4, comparing the thermal blooming effect of PEPV beams with different topological charges indicates that a PEPV beam with topological charges of 3 is the most sensitive to thermal blooming; (3) when the topological charge is fixed at 3, the thermal blooming effect decreases with the increase in power exponent; and (4) an increase in wind speed or a decrease in absorption coefficient can reduce the thermal blooming effect. The research results obtained in this article have guiding significance for the application of research into high-energy PEPV beams in the atmosphere.

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Section: Introductionmentioning

confidence: 99%

Thermal Blooming Effect of Power-Exponent-Phase Vortex Beams Propagating through the Atmosphere

Zhang,

Hou,

Zhang

et al. 2023

Photonics

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“…Com isso, diversos trabalhos foram publicados no decorrer destes anos visando descrever este fenômeno. (HOGGE, 1974;SMITH, 1977;GEBHARDT, 1990;BRADLEY;HERRMANN, 1974;ZHONG et al, 2023) Na década de 1970 iniciaram-se as primeiras tentativas de desenvolver mode- Para tanto é necessário ter um entendimento de como ocorrem os fenômenos que regem a dinâmica dos fluidos para se obter um entendimento do acoplamento do fenômeno não-linear, thermal blooming, com o fenômeno não-linear e estocástico, turbulência óptica. O trabalho desenvolvido pelo russo Kolmogorov sobre a turbulência estabeleceu uma série de potência universal para os escoamentos turbulentos (KOLMOGOROV, 1991).…”

Section: Revisão Da Literaturaunclassified

Investigação teórica dos fenômenos da propagação atmosférica de feixes de laser de alta potência

Morais

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Em primeiro lugar, agradeço a Deus que com Sua onisciência me proporcionou as capacidades necessárias para concluir este trabalho.Agradeço à Isabel, minha esposa, que embarcou em mais esta jornada com dedicação de tempo, paciência e apoio para superar este desafio.Ao professor Doutor Claudio Costa Motta, pela propositura do tema, dispêndio de tempo para apresentar seus ensinamentos indispensáveis para execução deste trabalho.Ao meu orientador, Professor Doutor Wagner de Rossi, pelo apoio a todas as propostas apresentadas e disponibilidade em ajudar na execução do projeto.Agradeço ao meu amigo Rubens pela disponibilidade em retirar as dúvidas para modelagem do problema. Bem como, camaradagem nestes dois anos de convívio ininterrupto.Aos meus demais colegas, Nacaratti, André, Bernardo, Elbis e Salustiano por tornar o ambiente de pesquisa mais agradável, pelo bom convívio e ajuda nos mais diversos assuntos cotidianos ao longo destes dois anos.

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Effect of steady-state thermal blooming on partially coherent radially polarized beams propagating in the atmosphere

Gu,

Wang,

Liu

et al. 2024

J. Opt. Soc. Am. A

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We undertake a computational study of the steady-state thermal blooming effect on a special class of partially coherent vector beams, called partially coherent radially polarized (PCRP) beams, propagating through the atmosphere. A computational propagation model that is based on a multi-phase screen method is established to simulate partially coherent vector beams. With the use of this model, the propagation properties of PCRP beams with different initial powers and spatial coherence widths are studied in detail, including average intensity distribution, r.m.s. beam width, and polarization. Our results unveil that PCRP beams can effectively reduce or overcome the negative effects caused by thermal blooming when the initial coherence width falls below a certain threshold. Further, it is shown that the spatial distribution of degree of polarization (DOP) is significantly affected by the thermal blooming during beam propagation, whereas the global DOP (integrating the DOP over a beam’s cross-section) is not.

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Mitigating thermal blooming effect of seawater using self-rotating beam

Cited by 3 publications

References 15 publications

Thermal Blooming Effect of Power-Exponent-Phase Vortex Beams Propagating through the Atmosphere

Thermal Blooming Effect of Power-Exponent-Phase Vortex Beams Propagating through the Atmosphere

Investigação teórica dos fenômenos da propagação atmosférica de feixes de laser de alta potência

Effect of steady-state thermal blooming on partially coherent radially polarized beams propagating in the atmosphere

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