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Proceedings Paper

Effects of astigmatic aberration in holographic generation of Laguerre-Gaussian beam
Author(s): Atsushi Wada; Yoko Miyamoto; Takumi Ohtani; Noboru Nishihara; Mitsuo Takeda
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Paper Abstract

The Laguerre-Gaussian (LG) beam is an optical beam with a phase singularity that propagates along its axis. We have previously reported the fabrication of blazed transmission phase holograms to generate beams with phase singularities. A common problem encountered in the generation of a phase singularity with high charge is that the singularity tends to split into m individual charge 1 singularities, where m is the charge of the original singularity. We have found through numerical simulation that astigmatic aberration can cause a higher-charge phase singularity to split. We have also found that strong astigmatic aberrations make the resulting beam close to a Hermite-Gaussian beam rather than an LG beam. Experimental investigation of these phenomena agree with the numerical simulation.

Paper Details

Date Published: 8 May 2001
PDF: 4 pages
Proc. SPIE 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001), (8 May 2001); doi: 10.1117/12.427088
Show Author Affiliations
Atsushi Wada, Univ. of Electro-Communications (Japan)
Yoko Miyamoto, Univ. of Electro-Communications (Japan)
Takumi Ohtani, Univ. of Electro-Communications (Japan)
Noboru Nishihara, Univ. of Electro-Communications (Japan)
Mitsuo Takeda, Univ. of Electro-Communications (Japan)


Published in SPIE Proceedings Vol. 4416:
Optical Engineering for Sensing and Nanotechnology (ICOSN 2001)
Koichi Iwata, Editor(s)

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