Seed source for plasma compression in the long wavelength infrared
| Autor: | Luke Johnson, Daniel Gordon, Antonio Ting, Marcus Babzien, Patrick Grugan, A. A. Mamonau, Rotem Kupfer, Yu-hsin Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Raman amplification
Infrared Physics::Optics FOS: Physical sciences Radiation 01 natural sciences 010305 fluids & plasmas law.invention Optics law 0103 physical sciences Chirp Physics::Atomic Physics 010306 general physics Physics business.industry Pulse duration Condensed Matter Physics Laser Physics - Plasma Physics Pulse (physics) Plasma Physics (physics.plasm-ph) Infrared window business Physics - Optics Optics (physics.optics) |
| DOI: | 10.48550/arxiv.2009.13481 |
| Popis: | Two color laser pulses are used to form an air plasma and generate broadband infrared radiation suitable as a seed for backward Raman amplification of CO2 laser pulses. Broadband radiation in the atmospheric window from 8-14 microns is observed. The infrared radiation is characterized using a long wavelength grating spectrometer specially designed to accept an ionizing laser filament at its input plane. The LWIR yield is greatly enhanced by chirping the drive pulse. Unidirectional pulse propagation simulations suggest that this is due in part to the dependence of the nonlinear refractive index on the pulse duration. Comment: 7 pages, 8 figures |
| Databáze: | OpenAIRE |
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