High localization, focal depth and contrast by means of nonlinear Bessel beams

Polesana, P., Faccio, D. , Di Trapani, P., Dubietis, A., Piskarskas, A., Couairon, A. and Porras, M. A. (2005) High localization, focal depth and contrast by means of nonlinear Bessel beams. Optics Express, 13(16), pp. 6160-6167. (doi:10.1364/OPEX.13.006160) (PMID:19498627)

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Abstract

We show an experimental and computational comparison between the resolution power, the contrast and the focal depth of a nonlin-early propagated diffraction-free beam and of other beams (a linear and a nonlinearly propagated Gaussian pulse): launching a nondiffractive Bessel pulse in a solution of Coumarine 120 in methanol creates a high contrast, 40 mm long, 10 μm width fluorescence channel excited by 3-photon absorption process. This fluorescence channel exhibits the same contrast and resolution of a tightly focused Gaussian pulse, but reaches a focal depth that outclasses by orders of magnitude that reached by an equivalent Gaussian pulse.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Faccio, Professor Daniele
Authors: Polesana, P., Faccio, D., Di Trapani, P., Dubietis, A., Piskarskas, A., Couairon, A., and Porras, M. A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN:1094-4087
ISSN (Online):1094-4087

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