Dynamic behavior of postfilamentation Raman pulses

作者：Daigle Jean Francois^*; Wang Tie Jun; Hosseini Sima; Yuan Shuai; Roy Gilles; Chin See Leang

来源：Applied Optics, 2011, 50(33): 6234-6238.

DOI：10.1364/AO.50.006234

• Dynamic behaviors
• Filamentation
• Pulse propagation
• Raman pulse
• Red-shifted
• Stokes pulse
• Systematic analysis
• Third-order non-linearity

We report on the postfilamentation behavior of a Stokes pulse created from intense and collimated ultrashort pulses propagating in air. A systematic analysis of the pulse propagation revealed that the redshifted Raman pulse produced during filamentation had a larger divergence than the postfilamentation intense pump pulse. Also, the analysis of the far-field Stokes transverse ring revealed that the intensity in this ionization-free light channel is still sufficiently high to induce stimulated Raman scattering after ionization had ended. This behavior further extends the potential of filamentation to remotely induce third-order nonlinearities.

• 出版日期2011-11-20