Long range robust multi-terawatt MWIR and LWIR atmospheric light bullets
| Autor: | Moloney, Jerome V., Schuh, Kolja, Panagiotopoulos, Paris, Kolesik, M., Koch, S. W. |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Druh dokumentu: | Článek |
| ISSN: | 0277-786X 1996-756X |
| DOI: | 10.1117/12.2262142 |
| Popis: | There is a strong push worldwide to develop multi-Joule femtosecond duration laser pulses at wavelengths around 3.5-4 and 9-11 mu m within important atmospheric transmission windows. We have shown that pulses with a 4 mu m central wavelength are capable of delivering multi-TW powers at km range. This is in stark contrast to pulses at near-IR wavelengths which break up into hundreds of filaments with each carrying around 5 GW of power per filament over meter distances. We will show that nonlinear envelope propagators fail to capture the true physics. Instead a new optical carrier shock singularity emerges that can act to limit peak intensities below the ionization threshold leading to low loss long range propagation. At LWIR wavelengths many-body correlations of weakly-ionized electrons further suppress the Kerr focusing nonlinearity around 10 mu m and enable whole beam self-trapping without filaments. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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