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Title: Tunable astigmatic {pi}/2 converter of laser modes with a fixed distance between input and output planes

Abstract

The scheme of a tunable astigmatic {pi}/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 {pi}/2 converter required for mode conversion was achieved for the first time by using the scaled fractional Fourier transforms of the appropriate orders. (laser modes and beams)

Authors:
 [1]
  1. A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
21464460
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 36; Journal Issue: 1; Other Information: DOI: 10.1070/QE2006v036n01ABEH003572
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CYLINDRICAL CONFIGURATION; DISTANCE; FOURIER TRANSFORMATION; LASERS; MODE CONVERSION; QUADRUPOLES; TUNING; CONFIGURATION; INTEGRAL TRANSFORMATIONS; MULTIPOLES; TRANSFORMATIONS

Citation Formats

Malyutin, A A. Tunable astigmatic {pi}/2 converter of laser modes with a fixed distance between input and output planes. United States: N. p., 2006. Web. doi:10.1070/QE2006V036N01ABEH003572.
Malyutin, A A. Tunable astigmatic {pi}/2 converter of laser modes with a fixed distance between input and output planes. United States. doi:10.1070/QE2006V036N01ABEH003572.
Malyutin, A A. Tue . "Tunable astigmatic {pi}/2 converter of laser modes with a fixed distance between input and output planes". United States. doi:10.1070/QE2006V036N01ABEH003572.
@article{osti_21464460,
title = {Tunable astigmatic {pi}/2 converter of laser modes with a fixed distance between input and output planes},
author = {Malyutin, A A},
abstractNote = {The scheme of a tunable astigmatic {pi}/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 {pi}/2 converter required for mode conversion was achieved for the first time by using the scaled fractional Fourier transforms of the appropriate orders. (laser modes and beams)},
doi = {10.1070/QE2006V036N01ABEH003572},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 1,
volume = 36,
place = {United States},
year = {Tue Jan 31 00:00:00 EST 2006},
month = {Tue Jan 31 00:00:00 EST 2006}
}
  • It is shown theoretically and experimentally that the transformation of modes by an astigmatic {pi}/2 converter is invariant with respect to the input-beam displacement and tilt. The possibility is considered of using this property for manipulating microobjects and simultaneous generation of Laguerre-Gaussian modes of different orders with the help of the same astigmatic {pi}/2 converter. (laser modes and beams)
  • The scheme of a tunable astigmatic {pi}/2 mode converter is described. The converter provides the use of input beams with the twofold variable Rayleigh length, while variations in the optical length of the converter itself do not exceed 1/6. (laser beams)
  • The properties of the astigmatic {pi}/2 converter are analysed upon the transformation of eigen- and non-eigenmodes, and beams of arbitrary type. It is shown that the action of the converter can be reduced to even and odd numbers of Fourier transforms performed independently in two orthogonal planes containing the optical axis of the converter. The operation of two arbitrary oriented {pi}/2 converters in tandem is described. This scheme permits obtaining at the same plane alternatively either the object image or its Fourier transform. Examples of the numerical simulation of the radiation propagation through the examined optical schemes are presented. (lasermore » beams)« less
  • A simple astigmatic scheme for obtaining focused Laguerre-Gaussian beams upon the {pi}/2 conversion of Hermite-Gaussian radiation modes is described. A zone in the vicinity of the focal region of a lens is estimated where the beam satisfies the conditions for the capture and confinement of microparticles. It is shown that this optical scheme uses the fractional Fourier transform, whose application in the {pi}/2 converter is demonstrated for the first time. (control of laser radiation parameters)