Effects of astigmatic aberration in holographic generation of Laguerre-Gaussian beam

Atsushi Wada; Yoko Miyamoto; Takumi Ohtani; Noboru Nishihara; Mitsuo Takeda

doi:10.1117/12.427088

8 May 2001 Effects of astigmatic aberration in holographic generation of Laguerre-Gaussian beam

Atsushi Wada, Yoko Miyamoto, Takumi Ohtani, Noboru Nishihara, Mitsuo Takeda

Proceedings Volume 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001); (2001) https://doi.org/10.1117/12.427088
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '01), 2001, Yokohama, Japan

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.

Citation Download Citation

Atsushi Wada, Yoko Miyamoto, Takumi Ohtani, Noboru Nishihara, and Mitsuo Takeda "Effects of astigmatic aberration in holographic generation of Laguerre-Gaussian beam", Proc. SPIE 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001), (8 May 2001); https://doi.org/10.1117/12.427088

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