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Optical wavepackets (optical bullets): a new diffraction free form of light211 travel

机译：光学包（光学子弹）：一种新的差分自由形式的光211行进

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This is the final report of a three-year, Laboratory-Directed Research and211u001eDevelopment (LDRD) project at the Los Alamos National Laboratory (LANL). We 211u001econducted studies of the propagation of self-confined packets of light or 211u001e'Optical Bullets' through air. These packets are self-forming and require no 211u001eactive optics. At the present time, theoretical explanations provide an 211u001eincomplete description of this process. Generation of these pulses requires a 211u001elight source of sufficient energy and with a short enough pulse-width that the 211u001eintensity exceeds a critical wavelength dependent value. We used a Ti:Sapphire 211u001ebased system to generate the pulses and we observed pulse-splitting and chirp-211u001edependent control of the formation of these filaments. In addition, we developed 211u001ea novel algorithm for extracting the phase and electric field of these pulses 211u001eusing Frequency Resolved Optical Gating coupled to genetic algorithms for pulse 211u001eretrieval.

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