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9 October 2021 Generating elliptical zero-order Bessel beams with a tilted diffraction grating
Paz Victoria T. Ramos, Raphael A. Guerrero
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Proceedings Volume 11898, Holography, Diffractive Optics, and Applications XI; 1189826 (2021) https://doi.org/10.1117/12.2602714
Event: SPIE/COS Photonics Asia, 2021, Nantong, Jiangsu, China
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Abstract
Our current work discusses an alternative cost-effective method for producing elliptical zero-order Bessel beams with a simple optical system based on a commercially available transmission grating. A zero-order Bessel beam is made to pass through a diffraction grating with a groove density of 600 lines per mm. An elliptical Bessel beam intensity profile is obtained with the 1st-order (m = 1) diffracted beam when the grating is rotated about an axis parallel to the grating vector. For a grating tilted by 20 deg from the vertical, non-diffraction of the elliptical Bessel beam is observed over a propagation range from 10 to 95 cm with an average core diameter of 404 um. The elliptical Bessel beam at m = 1 has an eccentricity of 0.6 for a grating tilt of 20 deg.
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Paz Victoria T. Ramos and Raphael A. Guerrero "Generating elliptical zero-order Bessel beams with a tilted diffraction grating", Proc. SPIE 11898, Holography, Diffractive Optics, and Applications XI, 1189826 (9 October 2021); https://doi.org/10.1117/12.2602714
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KEYWORDS
Bessel beams
Diffraction gratings
Beam propagation method
Diffraction
Axicons
Optical micromanipulation
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