Wavelength-independent laser beam shaping

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dc.contributor.authorDegama M.P.
dc.contributor.authorForbes A.
dc.date.accessioned2011-05-15T16:00:21Z
dc.date.available2011-05-15T16:00:21Z
dc.date.issued2010
dc.description.abstractThis paper presents a beam shaping device namely, a Diffractive Optical Element (DOE), which is used to change a beam having a Gaussian intensity profile into a beam with a uniform intensity profile. The DOE used in this work was fabricated from ZnSe and its performance was evaluated using a cw CO 2 laser. In most cases such elements are effective only at a specific design wavelength. However, in this paper we report on the design conditions which allow for wavelength independent elements. It was found that the DOE was able to successfully transform a Gaussian beam into a flattop beam for four different wavelengths in the range 9.2 μm to 10.6 μm. We also present experimental results on misalignment effects and it was found that small radial offsets of the incident beam on the DOE had a significant disruptive effect on the flattop beam profile. © 2010 SPIE.
dc.description.versionConference Paper
dc.identifier.citationProceedings of SPIE - The International Society for Optical Engineering
dc.identifier.citation7789
dc.identifier.issn0277786X
dc.identifier.other10.1117/12.862922
dc.identifier.urihttp://hdl.handle.net/10019.1/11653
dc.subjectBeam-shaping
dc.subjectDesign condition
dc.subjectDisruptive effects
dc.subjectFlat top beam
dc.subjectGaussian intensity profile
dc.subjectIncident beams
dc.subjectLaser beam shaping
dc.subjectMisalignment effects
dc.subjectSpecific design
dc.subjectUniform intensity
dc.subjectDensity (optical)
dc.subjectDiffractive optical elements
dc.subjectDiffractive optics
dc.subjectLaser beam welding
dc.subjectLaser beams
dc.subjectWavelength
dc.subjectGaussian beams
dc.titleWavelength-independent laser beam shaping
dc.typeConference Paper
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