Modes and beams

Tunable astigmatic π/2 converter of laser modes with a fixed distance between input and output planes

A. A. Malyutin

Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow

Abstract: The scheme of a tunable astigmatic π/2 mode converter is proposed in which the distance between input and output planes is fixed. The converter is tuned only by rotating the cylindrical components of optical quadrupoles used in the converter around its optical axis. The Gouy phase difference in the orthogonal planes of the astigmatic π/2 converter required for mode conversion was achieved for the first time by using the scaled fractional Fourier transforms of the appropriate orders.

PACS: 42.15.Dp, 42.30.Va

Received: 01.02.2005
Revised: 29.11.2005

 English version: Quantum Electronics, 2006, 36:1, 76–78

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