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Nonlinear propagation of chirped laser pulses through a dispersive and turbulent atmosphere

Journal Article · · Journal of the Optical Society of America. Part B, Optical Physics
DOI:https://doi.org/10.1364/josab.515777· OSTI ID:2372911
 [1];  [2];  [3];  [2]
  1. Naval Research Laboratory, Washington, DC (United States); Laboratory for Laser Energetics, University of Rochester
  2. Naval Research Laboratory, Washington, DC (United States)
  3. University of Rochester, NY (United States)

The evolution of ultrashort laser pulses in dispersive, turbulent, nonlinear, and dissipative media is discussed in connection with nonlinear self-focusing collapse and the onset of laser filamentation. In quiescent air, a laser pulse propagating with a peak power greater than a critical power for self-focusing will undergo a catastrophic, transverse collapse until the intensity is large enough for photoionization. At this point, self-focusing is arrested and balanced by plasma refraction, forming a laser filament. By applying an appropriate chirp, the dispersive properties of the medium can be used to enhance this process and control its onset, and to counter dissipative effects such as molecular absorption and atmospheric scattering. This paper presents an analysis of the effect of atmospheric turbulence on the propagation of nonlinear pulses with dispersion compensation (chirp). Furthermore, the analytical results are compared with wave optics simulations and found to be in reasonable agreement as long as the pulse maintains a near-Gaussian spatiotemporal profile.

Research Organization:
University of Rochester, NY (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003856
OSTI ID:
2372911
Alternate ID(s):
OSTI ID: 2369100
Journal Information:
Journal of the Optical Society of America. Part B, Optical Physics, Journal Name: Journal of the Optical Society of America. Part B, Optical Physics Journal Issue: 6 Vol. 41; ISSN 0740-3224
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English

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