Title :
Relativistic theory of frequency blue-shift of an intense ionizing laser beam in a plasma
Author :
Hizanidis, K. ; Vomvoridis, J.L. ; Mendonca, J.T. ; Frantzeskakis, D.J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece
fDate :
4/1/1996 12:00:00 AM
Abstract :
Frequency up-conversion of a laser beam causing gas ionization in a cavity is considered in a fully relativistic fashion. A simple ionization model, based on one-photon and multiphoton processes is used. A Vlasov fully nonlinear and ionization-model independent description is used in calculating the current which drives the wave equation for the electric field. The evolution of the wave frequency and its upshift are contrasted with those obtained in the nonrelativistic limit. It is found that the nonrelativistic treatment overestimates the frequency upshift by a factor more than two. Purely relativistic effects, such as a significant frequency modulation and a respective temporal pulse compression, are observed in the exact case
Keywords :
Vlasov equation; ionisation; multiphoton processes; plasma light propagation; relativistic plasmas; spectral line shift; wave equations; Vlasov description; electric field; frequency blue-shift; frequency up-conversion; gas ionization; intense ionizing laser beam; multiphoton processes; one-photon processes; plasma; relativistic theory; temporal pulse compression; wave equation; Frequency modulation; Gas lasers; Ion beams; Ionization; Laser beams; Laser modes; Laser theory; Partial differential equations; Pulse compression methods; Relativistic effects;
Journal_Title :
Plasma Science, IEEE Transactions on
