INVESTIGADORES
AMAYA ROBAYO Dafne Cecilia
artículos
Título:
Description of a multifocal arrangement of asymmetric Kummer-beam optical vortices
Autor/es:
LONDOÑO, NATALIA; RUEDA, EDGAR; GÓMEZ, JORGE A.; AMAYA, DAFNE; LENCINA, ALBERTO
Revista:
OPTICS AND LASERS IN ENGINEERING
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2020 vol. 130
ISSN:
0143-8166
Resumen:
In this work,we derived ananalytic expresión for the optical field generated by an off-axis Gaussian beam diffracted by a Discretized Vortex-Producing Lens. With this system, a multifocal arrangement of asymmetric opticalvorticesisobtainedwhosetopologicalchargevalueschangewiththepositionalongtheopticalaxis.This schemeallowsboth,obtainingaprincipalasymmetricvortexcorrespondingwiththe topological charge value ofthephasemask,andotherasymmetricvorticeswithchargesdifferentfromthephasemaskcharge.Withtheanalyticalexpression,theeffectsinducedbythediscretizationandmisalignmentontheirradianceandphaseof eachvortexcanbesimultaneouslystudied.Asignal-to-noiseratioexpressionis derived to verify if the noise of themultifocalsystemmightaffecttheopticalvorticesofinterestinasignificantway:Wefoundthatnoiseisnot a problem. In conclusion,aDiscretizedVortexProducingLenscanbeusedasacontinuousSpiralPhasePlate.Finally,weexploredthefeasibilitythatthevortexphasecouldbeemployedasadisplacementestimator
