Doctoral thesis
OA Policy
English

Optomechanical Clearing of Aerosols for Free-Space Optical Telecommunication

Number of pages129
Imprimatur date2023-03-15
Defense date2023-03-15
Abstract

Aerosol clearing via optomechanical displacement through the use of ultrafast laser pulses has been shown as an effective method for the enhancement of free-space optical telecommunication through turbid media like fog and clouds. This work represents a step towards a better understanding of the fundamental physical principles behind the clearing mechanism and improving the applicability of the technique. The overarching goal was to bring it from a laboratory setting closer to real-life application. To this end, the effect of a laser-induced shockwave in the air on an ensemble of droplets and single microspheres is demonstrated in several experiments. Additionally, an alternative way of laser-based shockwave generation in the air via the coherent rotational excitation of nitrogen molecules is demonstrated. Lastly, the use of beam-shaping techniques to generate complex, extended plasma structures in the air and their benefits are explored.

Keywords
  • Free-space optical telecommunication
  • Laser
  • Ultrafast laser pulses
  • Cloud
  • Fog
  • Cloud clearing
  • Aerosol clearing
  • Filamentation
  • Plasma
  • Filament
  • Shockwave
  • FSO
Research groups
Citation (ISO format)
SCHROEDER, Malte Christian. Optomechanical Clearing of Aerosols for Free-Space Optical Telecommunication. Doctoral Thesis, 2023. doi: 10.13097/archive-ouverte/unige:167917
Main files (1)
Thesis
accessLevelPublic
Secondary files (1)
Imprimatur
accessLevelPublic
Identifiers
652views
727downloads

Technical informations

Creation03/27/2023 3:03:17 PM
First validation04/03/2023 5:41:32 AM
Update time04/03/2025 4:25:56 PM
Status update04/03/2025 4:25:56 PM
Last indexation05/13/2025 9:08:22 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack