The generation of Bessel beams at millimetre-wave frequencies by use of an axicon.

Monk, S. and Arlt, J. and Robertson, D. A. and Courtial, J. and Padgett, M. J. (1999) The generation of Bessel beams at millimetre-wave frequencies by use of an axicon. Optics Communications, 170 (4-6). pp. 213-215. ISSN 0030-4018

Abstract

An axicon is used to generate a Bessel beam at 90 GHz in the millimetre-wave region of the spectrum. The Bessel beam has a central intensity maximum of approximately 4 mm in diameter that is maintained over a propagation distance greater than 60 mm. (C) 1999 Elsevier Science B.V. All rights reserved.