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Proceedings Paper

Optical system for Laguerre-Gaussian/Hermite-Gaussian mode conversion
Author(s): Aleksandr Bekshaev; Andriy Yurievich Popov
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Paper Abstract

A simple Laguerre-Gaussian (LG) -- Hermite-Gaussian (HG) mode converter structure is described that contains only flat mirrors and, possibly, transversely uniform phase correctors. Its action is grounded on the superposition of the initial beam with proper auxiliary beam, which is generated automatically by the corrector itself. In the case of lowest LG (HG) modes such auxiliary beam can be obtained by the initial beam reflection from the properly oriented flat mirror and uniform phase shift. The converter scheme has the interferometer-like structure, where the initial beam is splitted into two arms by the light magnitude divider. Within the first arm the beam retains its initial structure while the second arm allows preparing the auxiliary beam. Then two partial beams are re-coupled; in order to avoid irrelevant discrepancies between them proper shape-correcting and phase- shifting provisions should been made. The advantage of this converter system is the absence of focusing elements, simplicity of assemblage and practical arrangement. Instead, this method inevitably leads to energy losses and has rather specialized character: in general, for conversion of different modes different converter structures are necessary. Possible applications of such mode converters as interferometer devices are discussed.

Paper Details

Date Published: 30 May 2001
PDF: 6 pages
Proc. SPIE 4403, Second International Conference on Singular Optics (Optical Vortices): Fundamentals and Applications, (30 May 2001); doi: 10.1117/12.428283
Show Author Affiliations
Aleksandr Bekshaev, Univ. Instelling Antwerpen (Belgium)
Andriy Yurievich Popov, Odessa Univ. (Ukraine)


Published in SPIE Proceedings Vol. 4403:
Second International Conference on Singular Optics (Optical Vortices): Fundamentals and Applications
Marat S. Soskin; Mikhail V. Vasnetsov, Editor(s)

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