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Physical Review E
A nonlinear optical phenomenon, relativistic cross-phase modulation, is reported. A relativistically intense light beam ͑I = 1.3ϫ 10 18 W cm −2 , = 1.05 m͒ is experimentally observed to cause phase modulation of a lower intensity, copropagating light beam in a plasma. The latter beam is generated when the former undergoes the stimulated Raman forward scattering instability. The bandwidth of the Raman satellite is found to be broadened from 3.8-100 nm when the pump laser power is increased fromdoi:10.1103/physreve.74.046406 pmid:17155181 fatcat:awvoktz7g5fgtfdp5ajnjkr7ly