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Beam shaping with a laser amplifier
SPIE Proceedings, 2014We propose a new technique for laser beam shaping namely the reshaping of the laser beam into a desirable beam profile by the use of a laser amplifier with a pump beam that has a modified intensity profile. We developed the analytical formula which describes the transformation of the seed beam into the desired beam profile in the amplifiers small ...
Igor A. Litvin, Oliver J. P. Collett
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Laser heating with doughnut-shaped beams
Journal of Applied Physics, 2022Doughnut-shaped laser beams have applications in laser-based additive manufacturing, laser heating of diamond anvil cells, and optical super-resolution microscopy. In applications like additive manufacturing and heating of diamond anvil cells, a doughnut-shaped beam is frequently used to obtain a more uniform temperature profile relative to that ...
Chenhao Jian +2 more
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Technique for measuring the beam shape of pulsed lasers
Review of Scientific Instruments, 1979A simple technique for the measurement of the beam shape parameters of pulsed lasers, with just a single pulse of the laser is described. It involves the use of several beam dividers inclined at very small angles to the beam axis, reflecting the beam back to a screen or a phosphor placed near the exit of the laser.
Prasad, CR +3 more
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Model Predictive Control for Laser Beam Shaping
IEEE Latin America Transactions, 2017Adaptive Optics (AO) is a technique used to mitigate the effect of the atmosphere in the resolution of scientific images. The performance of an adaptive optics system strongly depends on the quality of the laser beam projected to the sky in terms of amplitude and phase. Currently, cumbersome procedures are carried out to optimize the laser beam.
Escarate, Pedro +3 more
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Mathematical Aspects of Laser Beam Shaping and Splitting
International Optical Design Conference and Optical Fabrication and Testing, 2010We will discuss general mathematical ideas arising in the problems of Laser beam shaping and splitting. We will be particularly concerned with questions concerning the scaling and symmetry of such systems.
L. A. Romero, F. M. Dickey
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Laser–particle interactions in shaped beams: Beam power normalization
Journal of Quantitative Spectroscopy and Radiative Transfer, 2013Abstract We present a semi-analytic theory for calculating light–particle interactions in shaped laser beams even when the paraxial beam description is invalid. It requires weighting the expressions for the cross sections with a beam normalization parameter, ϰ , associated with the incident power.
Stout, Brian +4 more
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Laser Beam Shaping and Spot Size
Current Protocols in Cytometry, 1997AbstractOne or more lasers are the source of illumination in the majority of fluorescence flow cytometers now in use. A typical laser emits a beam on the order of 1 mm in diameter. For efficient utilization this beam must be shaped and focused to a smaller size to illuminate the cell stream passing through the interrogation point.
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Micrograting-array beam-shaping technique for asymmetrical laser beams
Applied Optics, 2005A beam-shaping technique is presented for asymmetrical laser beams with different beam waists and divergences in both vertical and horizontal directions. We utilize a pair of two-dimensional micrograting arrays to equalize the beam parameter products of an asymmetrical beam in orthogonal directions by deflecting the appointed parts of the beam on the ...
Guoxing, Zheng +3 more
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Laser beam quality, entropy and the limits of beam shaping
Optics Communications, 1996Abstract The paper presents a thermodynamical and quantum-statistical analysis of the electromagnetic field with the aim of deriving the entropy of partially coherent thermal and laser beams. Together with the second law of thermodynamics the knowledge of the entropy allows the discussion of the limits of beam shaping.
Th. Graf, J.E. Balmer
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Application of Spiral Laser Beams for Beam Shaping Problem
2006 International Workshop on Laser and Fiber-Optical Networks Modeling, 2006Spiral beams are paraxial structurally stable rotating wavefields. For any planar curve there are such spiral beams, whose intensity shape is similar to the curve. The usage of Gerchberg?Saxton iterative algorithm and the initial data, based on spiral beam theory, provide an effective way for construction of specific vortical phase elements.
E.G. Abramochkin +2 more
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