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Doughnut laser beam as an incoherent superposition of two petal beams

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dc.contributor.author Litvin, IA
dc.contributor.author Ngcobo, Sandile
dc.contributor.author Naidoo, Darryl
dc.contributor.author Ait-Ameur, K
dc.contributor.author Forbes, A
dc.date.accessioned 2017-01-17T09:02:00Z
dc.date.available 2017-01-17T09:02:00Z
dc.date.issued 2014-02
dc.identifier.citation Litvin, I.A., Ngcobo, S., Naidoo, D., Ait-Ameur, K. and Forbes, A. 2014. Doughnut laser beam as an incoherent superposition of two petal beams. Optics Letters, 39, pp. 704-707 en_US
dc.identifier.issn 0146-9592
dc.identifier.uri http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-39-3-704
dc.identifier.uri http://hdl.handle.net/10204/8915
dc.description Copyright: 2014 Optical Society of America. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item.For access to the full text item, please consult the publisher's website. The definitive version of the work is published in the Journal of Optics Letters, 39, pp. 704-707. en_US
dc.description.abstract Laguerre–Gaussian beams with a nonzero azimuthal index are known to carry orbital angular momentum (OAM), and are routinely created external to laser cavities. The few reports of obtaining such beams from laser cavities suffer from inconclusive evidence of the real electromagnetic field. In this Letter we revisit this question and show that an observed doughnut beam from a laser cavity may not be a pure Laguerre–Gaussian azimuthal mode but can be an incoherent sum of petal modes, which do not carry OAM. We point out the requirements for future analysis of such fields from laser resonators. en_US
dc.language.iso en en_US
dc.publisher Optical Society of America en_US
dc.relation.ispartofseries Workflow;12859
dc.subject Laser resonators en_US
dc.subject Laser beam characterization en_US
dc.subject Coherence en_US
dc.title Doughnut laser beam as an incoherent superposition of two petal beams en_US
dc.type Article en_US
dc.identifier.apacitation Litvin, I., Ngcobo, S., Naidoo, D., Ait-Ameur, K., & Forbes, A. (2014). Doughnut laser beam as an incoherent superposition of two petal beams. http://hdl.handle.net/10204/8915 en_ZA
dc.identifier.chicagocitation Litvin, IA, Sandile Ngcobo, Darryl Naidoo, K Ait-Ameur, and A Forbes "Doughnut laser beam as an incoherent superposition of two petal beams." (2014) http://hdl.handle.net/10204/8915 en_ZA
dc.identifier.vancouvercitation Litvin I, Ngcobo S, Naidoo D, Ait-Ameur K, Forbes A. Doughnut laser beam as an incoherent superposition of two petal beams. 2014; http://hdl.handle.net/10204/8915. en_ZA
dc.identifier.ris TY - Article AU - Litvin, IA AU - Ngcobo, Sandile AU - Naidoo, Darryl AU - Ait-Ameur, K AU - Forbes, A AB - Laguerre–Gaussian beams with a nonzero azimuthal index are known to carry orbital angular momentum (OAM), and are routinely created external to laser cavities. The few reports of obtaining such beams from laser cavities suffer from inconclusive evidence of the real electromagnetic field. In this Letter we revisit this question and show that an observed doughnut beam from a laser cavity may not be a pure Laguerre–Gaussian azimuthal mode but can be an incoherent sum of petal modes, which do not carry OAM. We point out the requirements for future analysis of such fields from laser resonators. DA - 2014-02 DB - ResearchSpace DP - CSIR KW - Laser resonators KW - Laser beam characterization KW - Coherence LK - https://researchspace.csir.co.za PY - 2014 SM - 0146-9592 T1 - Doughnut laser beam as an incoherent superposition of two petal beams TI - Doughnut laser beam as an incoherent superposition of two petal beams UR - http://hdl.handle.net/10204/8915 ER - en_ZA


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