Temporal analysis of Airy beam propagation in photorefractive media

2019 ◽  
Vol 76 ◽  
pp. 45-50 ◽  
Author(s):  
M.Z. Zhang ◽  
T.Y. Zhang ◽  
G.W. Huo ◽  
Z.Q. Hui ◽  
Z.L. Duan ◽  
...  
Keyword(s):  
Beam Propagation ◽  
Temporal Analysis ◽  
Airy Beam

Airy beam propagation: autofocusing, quasi-adiffractional propagation, and self-healing

2021 ◽  
Vol 38 (5) ◽  
pp. 711
Author(s):  
Jorge A. Anaya-Contreras ◽  
Arturo Zúñiga-Segundo ◽  
Héctor M. Moya-Cessa
Keyword(s):  
Beam Propagation ◽  
Self Healing ◽  
Airy Beam

scholarly journals Beam Propagation Factor of a Cosh-Airy Beam

2019 ◽  
Vol 9 (9) ◽  
pp. 1817 ◽  
Author(s):  
Yimin Zhou ◽  
Yiqing Xu ◽  
Guoquan Zhou
Keyword(s):  
Numerical Calculation ◽  
Beam Propagation ◽  
Beam Waist ◽  
Second Order ◽  
Analytical Expression ◽  
Airy Beam ◽  
Minimum Value ◽  
Decay Factor ◽  
Propagation Factor ◽  
Beam Propagation Factor

Based on the second-order moments, the analytical expression of the beam propagation factor of a cosh-Airy beam has been derived. The beam propagation factor was determined by the decay factor and the cosh parameter. Because the beam propagation factors in the x- and y-directions of the cosh-Airy beam have the same form, only the beam propagation factor in the x- direction was selected as the object of numerical calculation and analysis. The effects of the decay factor and the cosh parameter on the beam propagation factor were investigated. When the decay factor was greater than 1, the beam propagation factor first increased and then decreased with the increase of the cosh parameter, and finally, tended to a minimum value. Under the condition that the decay factor was less than 1, the beam propagation factor always increased with the increase of the cosh parameter. As the decay factor increased, the beam propagation factor decreased and tended to a minimum value. Finally, the effects of the decay factor and the cosh parameter on the squares of the beam waist and the divergence were analyzed in more detail.

scholarly journals Temporal analysis of laser beam propagation in the atmosphere using computer-generated long phase screens

2008 ◽  
Vol 16 (3) ◽  
pp. 2206 ◽  
Author(s):  
Federico Dios ◽  
Jaume Recolons ◽  
Alejandro Rodríguez ◽  
Oscar Batet
Keyword(s):  
Laser Beam ◽  
Beam Propagation ◽  
Temporal Analysis ◽  
Laser Beam Propagation ◽  
Phase Screens

Beam propagation factor of an Airy beam

2011 ◽  
Vol 13 (8) ◽  
pp. 085704 ◽  
Author(s):  
Rui-Pin Chen ◽  
Chao-Fu Ying
Keyword(s):  
Beam Propagation ◽  
Airy Beam ◽  
Propagation Factor ◽  
Beam Propagation Factor

Microwave-controlled airy beam propagation in multilevel atomic vapors

Optik ◽  
2018 ◽  
Vol 164 ◽  
pp. 465-471
Author(s):  
Zhenkun Wu ◽  
Qian Zhang ◽  
Hao Guo ◽  
Yuzong Gu
Keyword(s):  
Beam Propagation ◽  
Atomic Vapors ◽  
Airy Beam

scholarly journals DISCRETE AIRY BEAM PROPAGATION IN DEEP OCEANS

2018 ◽  
Vol 36 (4) ◽  
pp. 1
Author(s):  
Marcelo Diniz Santa Marinha ◽  
Danian S. Oliveira ◽  
Paulo Eduardo Miranda Cunha ◽  
Luiz Gallisa Guimarães
Keyword(s):  
Wave Propagation ◽  
Quantum Mechanics ◽  
Wave Packet ◽  
Normal Modes ◽  
Beam Propagation ◽  
Acoustic Energy ◽  
Ocean Acoustics ◽  
Airy Beam ◽  
Airy Beams

ABSTRACT. In this work, based on the theory of modal propagation of acoustic energy in deep oceans and using the analogy between acoustics and quantum mechanics, we show that it is possible the existence of almost dispersionless Airy beams propagation at great distances with simultaneous wave packet shape preservation.Keywords: Normal modes, wave propagation, ocean acoustics, Airy beam.RESUMO. Neste trabalho, baseado na teoria de propagação da energia acústica por modos em oceanos profundos, mostraremos que é possível a existência de feixes de Airy que se propagam em grandes distâncias, com pouca dispersão da energia acústica e preservação de sua formaPalavras-chave: Modos normais, propagação de ondas, acústica oceanográfica, feixe de Airy.

Twitter Usage Using Common Reference to Tinnitus

2020 ◽  
Vol 29 (2) ◽  
pp. 206-217
Author(s):  
Jianyuan Ni ◽  
Monica L. Bellon-Harn ◽  
Jiang Zhang ◽  
Yueqing Li ◽  
Vinaya Manchaiah
Keyword(s):  
Nonprofit Organizations ◽  
Temporal Trends ◽  
Temporal Analysis ◽  
Cross Sectional ◽  
For Profit ◽  
Common Reference ◽  
Personal Experiences ◽  
Twitter Users ◽  
Sectional Analysis ◽  
Share Information

Objective The objective of the study was to examine specific patterns of Twitter usage using common reference to tinnitus. Method The study used cross-sectional analysis of data generated from Twitter data. Twitter content, language, reach, users, accounts, temporal trends, and social networks were examined. Results Around 70,000 tweets were identified and analyzed from May to October 2018. Of the 100 most active Twitter accounts, organizations owned 52%, individuals owned 44%, and 4% of the accounts were unknown. Commercial/for-profit and nonprofit organizations were the most common organization account owners (i.e., 26% and 16%, respectively). Seven unique tweets were identified with a reach of over 400 Twitter users. The greatest reach exceeded 2,000 users. Temporal analysis identified retweet outliers (> 200 retweets per hour) that corresponded to a widely publicized event involving the response of a Twitter user to another user's joke. Content analysis indicated that Twitter is a platform that primarily functions to advocate, share personal experiences, or share information about management of tinnitus rather than to provide social support and build relationships. Conclusions Twitter accounts owned by organizations outnumbered individual accounts, and commercial/for-profit user accounts were the most frequently active organization account type. Analyses of social media use can be helpful in discovering issues of interest to the tinnitus community as well as determining which users and organizations are dominating social network conversations.

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