Vol. 30, issue 04, article # 5

Apeksimov D.V., Zemlyanov A.A., Kabanov A.M., Stepanov A.N. Post-filamentation light channels in air. // Optika Atmosfery i Okeana. 2017. V. 30. No. 04. P. 291–295 [in Russian].
Copy the reference to clipboard

The results are presented of experimental studies of spatial characteristics of postfilamentation light channels in air formed by femtosecond pulses of Ti:Sapphire laser with different energy for focused and collimated beams. It was found that for a focused beam in the far zone from the filamentation region, the angular divergence of channels is dozens of times lower than the angular divergence of the beam as a whole. The angular divergence of the channels is first significantly reduced with an increase of the pulse energy, then goes into a saturation mode. For collimated beams, at a fixed distance from the source, an increase in the pulse energy also leads to stabilization of the transverse dimension of the channel.


laser radiation, femtosecond pulse, filamentation, post-filamentation light channel, focusing, air


  1. Self-focusing: Past and present. Fundamentals and prospects // Topics in Appl. Phys. / Eds. R.W. Boyd et al. Berlin: Springer, 2009. V. 114. P. 3–19.
  2. Chekalin S.V., Kandidov V.P. Ot samofokusirovki svetovyh puchkov – k filamentacii lazernyh impul'sov // Uspehi fiz. nauk. 2013. V. 183, N 2. P. 133–152.
  3. Mehain G., Couairon A., Andre Y.-B., D'Amico C., Franco M., Prade B., Tzortzakis S., Mysyrowicz A., Sauerbrey R. Long-range self-channeling of infrared laser pulses in air: A new propagation regime without ionization // Appl. Phys. B. 2004. V. 79. P. 379–382.
  4. Daigle J.-F., Kosareva O., Panov N., Wang T.-J., Hosseini S., Yuan S., Roy G., Chin S.L. Formation and evolution of intense, post-filamentation, ionization-free low divergence beams // Opt. Commun. 2011. V. 284. P. 3601–3606.
  5. Hui Gao, Weiwei Liu, See Leang Chin. Post-filamentation multiple light channel formation in air // Laser Phys. 2014. V. 24. Р. 055301. DOI: 10.1088/1054-660X/24/5/055301.
  6. Zemljanov A.A., Bulygin A.D., Gejnc Ju.Je., Minina O.V. Dinamika svetovyh struktur pri filamentacii femtosekundnyh lazernyh impul'sov v vozduhe // Optika atmosf. i okeana. 2016. V. 29, N 5. P. 359–368; Zеmlyanov А.А., Bulygin А.D., Gеints Yu.E., Мininа О.V. Dynamics of light structures during filamentation of femtosecond laser pulses in air // Atmos. Ocean. Opt. 2016. V. 29, N 5. P. 395–403.
  7. Gejnc Ju.Je., Zemljanov A.A., Kabanov A.M., Matvienko G.G., Stepanov A.N. Formirovanie filamenta femtosekundnogo lazernogo impul'sa v vozduhe posle fokusa opticheskoj sistemy // Optika atmosf. i okeana. 2012. V. 25, N 9. P. 745–752; Gеints Yu.E., Zеmlyanov А.А., KаbаnоА.М., Маtvienkо G.G., StеpаnоА.N. Filament formation beyond linear focus during femtosecond laser pulse propagation in air // Atmos. Ocean. Opt. 2013. V. 26, N 2. P. 96–103.
  8. Gejnc Ju.Je., Apeksimov D.V., Afonasenko A.V. Programmno-vychislitel'nyj kompleks dlja analiza poperechnyh profilej lazernyh puchkov (profilometr): Svidetel'stvo o gosudarstvennoj registracii programmy dlja JeVM N 2014616871 ot 07.07.2014. Pravoobladatel': ИОА СО РАН (RU).
  9. Bochkarev N.N., Kabanov A.M., Stepanov A.N. Prostranstvennaja lokalizacija oblasti filamentacii vdol' trassy rasprostranenija sfokusirovannogo femtosekundnogo lazernogo izluchenija v vozduhe // Optika atmosf. i okeana. 2007. V. 20, N 10. P. 861–865.