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Comparison of infrared laser beam shaping by diffractive and refractive methods

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dc.contributor.author Forbes, A
dc.contributor.author Du Plessis, A
dc.contributor.author Rohwer, EG
dc.date.accessioned 2007-07-17T10:25:18Z
dc.date.available 2007-07-17T10:25:18Z
dc.date.issued 2005-08
dc.identifier.citation Forbes, A, Du Plessis, A and Rohwer, EG. 2005. Comparison of infrared laser beam shaping by diffractive and refractive methods. Proceedings of SPIE, vol. 5876 en
dc.identifier.issn 0277-786X
dc.identifier.uri http://hdl.handle.net/10204/1005
dc.description Copyright: 2005 The International Society for Optical Engineering en
dc.description.abstract Infra-red laser beam shaping has the inherent difficulty that simple ray tracing methods often yield anomalous results, due primarily to the propagation effects at longer wavelengths. Techniques based on diffraction theory have been developed to overcome this, with associated parameters to determine when one approach is needed versus another. In this paper, infra-red (IR) beam shaping by diffractive methods is investigated and compared to refractive methods. Theoretical results on the beam shapers are calculated through a combination of analytical and numerical techniques, and using both ideal and non-ideal inputs. The authors show that the diffractive optical element (DOE) is remarkably resilient to input errors of wavelength and beam quality, while the refractive shaper is found to be difficult to model. Optical elements based on the two approaches were designed, and then fabricated from ZnSe. A comparison between the fabricated elements and the designed elements is presented, and some of the findings on practical problems in having such elements fabricated are highlighted. en
dc.language.iso en en
dc.publisher The International Society for Optical Engineering en
dc.subject DOEs en
dc.subject Refractive shaping en
dc.subject Infra-red laser beams en
dc.subject Beam propagation en
dc.subject Beam shaping en
dc.title Comparison of infrared laser beam shaping by diffractive and refractive methods en
dc.type Conference Presentation en
dc.identifier.apacitation Forbes, A., Du Plessis, A., & Rohwer, E. (2005). Comparison of infrared laser beam shaping by diffractive and refractive methods. The International Society for Optical Engineering. http://hdl.handle.net/10204/1005 en_ZA
dc.identifier.chicagocitation Forbes, A, A Du Plessis, and EG Rohwer. "Comparison of infrared laser beam shaping by diffractive and refractive methods." (2005): http://hdl.handle.net/10204/1005 en_ZA
dc.identifier.vancouvercitation Forbes A, Du Plessis A, Rohwer E, Comparison of infrared laser beam shaping by diffractive and refractive methods; The International Society for Optical Engineering; 2005. http://hdl.handle.net/10204/1005 . en_ZA
dc.identifier.ris TY - Conference Presentation AU - Forbes, A AU - Du Plessis, A AU - Rohwer, EG AB - Infra-red laser beam shaping has the inherent difficulty that simple ray tracing methods often yield anomalous results, due primarily to the propagation effects at longer wavelengths. Techniques based on diffraction theory have been developed to overcome this, with associated parameters to determine when one approach is needed versus another. In this paper, infra-red (IR) beam shaping by diffractive methods is investigated and compared to refractive methods. Theoretical results on the beam shapers are calculated through a combination of analytical and numerical techniques, and using both ideal and non-ideal inputs. The authors show that the diffractive optical element (DOE) is remarkably resilient to input errors of wavelength and beam quality, while the refractive shaper is found to be difficult to model. Optical elements based on the two approaches were designed, and then fabricated from ZnSe. A comparison between the fabricated elements and the designed elements is presented, and some of the findings on practical problems in having such elements fabricated are highlighted. DA - 2005-08 DB - ResearchSpace DP - CSIR KW - DOEs KW - Refractive shaping KW - Infra-red laser beams KW - Beam propagation KW - Beam shaping LK - https://researchspace.csir.co.za PY - 2005 SM - 0277-786X T1 - Comparison of infrared laser beam shaping by diffractive and refractive methods TI - Comparison of infrared laser beam shaping by diffractive and refractive methods UR - http://hdl.handle.net/10204/1005 ER - en_ZA


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