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- Published
- By Maria Callier
- AF Office of Scientific Research
In an article published in Science magazine, Dr. Moloney--who conducted his research in collaboration with Professor Demetrios Christodoulides and others at the University of Central Florida--explains laser beam bending as a process involving a combination of waves, where one wave leads (carrying most of the beam's intensity) and many, smaller waves trail the leader. Interference occurring among these trailing waves is such that the leading wave curves in one direction while the tail bends the opposite way.
When powerful laser pulses reach sufficient intensity, they form filaments (i.e., peculiar, self-guiding beams of light). The utility of these filaments relies on a means to control their varying locations and shapes. For instance, some laser beams (termed Bessel beams) produce longer, plasma channels, whereas self-bending Airy beams generate curved light filaments and plasma channels in the air. Airy beams also exhibit a self-healing property; their capacity for quickly reassembling themselves after being blocked or distorted translates to distortion-free propagation through turbulence and fog.
The primary challenges for the physicists pertain to ensuring that beam-curving effects are useful in real-life remote applications. Accordingly, they are focused on devising an innovative mechanism for extending light filaments and plasma channels over distances. The scientists also plan further examination of the physics underlying the creation of light filaments and plasma channels in environments where they can successfully duplicate varying atmospheric conditions. To this end, AFRL-provided expertise will assist the university scientists in gaining a more complete understanding of this complex phenomenon and its manipulation.
