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dc.contributor.author Naidoo, Darryl
dc.contributor.author Godin, T
dc.contributor.author Fromager, M
dc.contributor.author Aït-Ameur, K
dc.contributor.author Forbes, A
dc.date.accessioned 2014-08-19T06:38:50Z
dc.date.available 2014-08-19T06:38:50Z
dc.date.issued 2014-02
dc.identifier.citation Naidoo, D, Godin, T, Fromager, M, Aït-Ameur, K and Forbes, A. 2014. Spatial superpositions of Gaussian beams. In: Proceedings of SPIE, Volume 8999, Complex Light and Optical Forces VIII, San Francisco, California, 1 February 2014 en_US
dc.identifier.uri http://spie.org/Publications/Proceedings/Paper/10.1117/12.2039033
dc.identifier.uri http://hdl.handle.net/10204/7609
dc.description Proceedings of SPIE, Volume 8999, Complex Light and Optical Forces VIII, San Francisco, California, 1 February 2014 en_US
dc.description.abstract We explore an interferometric beam shaping technique that considers the coaxial superposition of two Gaussian beams. This technique is traditionally implemented in a Mach-Zehnder interferometer; however, to avoid phase shift drift due to vibrations and thermal effects we employ amplitude and phase modulation with a spatial light modulator (SLM) to achieve the beam shaping. We consider two Gaussian beams of equal but opposite curvature that possess the same phase and width incident on a focusing lens. At the plane of the lens we obtain a multi-ringed beam with a central intensity maximum which develops into a multi-ringed beam with a central null at the focal plane of the lens. The interesting feature of this beam is that it possesses two focal spots on either side of the focal plane of the lens. We investigate obstructing the beam at the focal plane of the lens and by carefully selecting the free parameters we obtain an unobstructed second focus while the equivalent Gaussian beam is sufficiently obstructed. en_US
dc.language.iso en en_US
dc.publisher SPIE Proceedings en_US
dc.relation.ispartofseries Workflow;13117
dc.subject Cosine-Gaussian beam en_US
dc.subject Optical bottle beam en_US
dc.subject Bi-axial focusing en_US
dc.subject Beam shaping technique en_US
dc.title Spatial superpositions of Gaussian beams en_US
dc.type Presentation en_US


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