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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 16,
  • Issue 7,
  • pp. 073201-
  • (2018)

Polarization-dependent femtosecond laser filamentation in air

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Abstract

We report on a systematic study of the laser polarization effect on a femtosecond laser filamentation in air. By changing the laser’s ellipticity from linear polarization to circular polarization, the onset position of laser filament formation becomes farther from the focusing optics, the filament length is shorter, and less laser energy is deposited. The laser polarization effect on air filaments is supported by a simulation and analysis of the polarization-dependent critical power and ionization rates in air.

© 2018 Chinese Laser Press

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