Small Beam Nonparaxiality Arrests Self-Focusing of Optical Beams
- 3 June 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 76 (23) , 4356-4359
- https://doi.org/10.1103/physrevlett.76.4356
Abstract
A new equation for self-focusing in the presence of small beam nonparaxiality is derived. Analysis of this equation shows that nonparaxiality remains small as the beam propagates. Nevertheless, nonparaxiality arrests self-focusing when the beam width becomes comparable to its wavelength. A series of focusing-defocusing cycles of decreasing magnitude follows, ending with a final defocusing stage.Keywords
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