Smallest flattop focus by polarization engineering
Applied Optics, Vol. 47, Issue 16, pp. 2931-2940 (2008)
http://dx.doi.org/10.1364/AO.47.002931
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Abstract
Spatial engineering of polarization as a new method of beam shaping is analyzed by using scalar diffraction theory. For the one-dimensional case, it is shown that the smallest flattop far-field distribution can be obtained by adopting a linear polarization that changes direction as a linear function of location in the pupil plane. The resulting light field is functionally equivalent to a cosinusoidal function modulation of the wavefront but maintains high efficiency. This polarization beam shaping technique proves to be highly useful in applications where diffraction effects need to be taken into account. The extension of this technique to two-dimensional beam shaping is also demonstrated.
© 2008 Optical Society of America
OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(140.3300) Lasers and laser optics : Laser beam shaping
(220.2560) Optical design and fabrication : Propagating methods
(220.2740) Optical design and fabrication : Geometric optical design
(260.1960) Physical optics : Diffraction theory
(260.5430) Physical optics : Polarization
ToC Category:
Physical Optics
History
Original Manuscript: February 11, 2008
Revised Manuscript: April 18, 2008
Manuscript Accepted: April 19, 2008
Published: May 21, 2008
Citation
Bing Hao, Jordan Burch, and James Leger, "Smallest flattop focus by polarization engineering," Appl. Opt. 47, 2931-2940 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-16-2931
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