Vol. 33, issue 09, article # 4

Abstract:

The conditions for the occurrence of two pump beams propagating at an angle to each other, in which highly directed white SC beams are formed, are investigated and analyzed. The beams are formed due to aberration focusing of a femtosecond radiation pulse with a wavelength of 940 nm. It is shown that the mechanism of their formation is related to the diffraction of the pump beam on the filament plasma in the meridional focus region and Kerr self-focusing of radiation. The dynamics of development of these beams is demonstrated.

Keywords:

ultrashort laser pulses, filamentation, laser plasma

Figures:

References:

1. Zemlyanov A.A., Bulygin A.D., Gejnts Yu.E., Minina O.V. Dinamika svetovyh struktur pri filamentatsii femtosekundnyh lazernyh impul'sov v vozduhe // Optika atmosf. i okeana. 2016. V. 29, N 5. P. 359–368; Zemlyanov A.A., Bulygin A.D., Geints Yu.E., Minina O.V. Dynamics of light structures during filamentation of femtosecond laser pulses in air // Atmos. Ocean. Opt. 2016. V. 29, N 5. P. 395–403.
2. Apeksimov D.V., Zemlyanov A.A., Kabanov A.M., Stepanov A.N. Postfilamentatsionnye svetovye kanaly v vozduhe // Optika atmosf. i okeana. 2017. V. 30, N 4. P. 291–295; Apeksimov D.V., Zemlyanov A.A., Kabanov A.M., Stepanov A.N. Post-filamentation light channels in air // Atmos. Ocean. Opt. 2017. V. 30, N 5. P. 451–455.
3. Apeksimov D.V., Gejnts Yu.E., Zemlyanov A.A., Kabanov A.M., Matvienko G.G., Oshlakov V.K. Upravlenie harakteristikami mnozhestvennoj filamentatsii femtosekundnyh lazernyh impul'sov v vozduhe // Optika atmosf. i okeana. 2019. V. 32, N 9. P. 717–725; Apeksimov D.V., Geints Yu.E., Zemlyanov A.A., Kabanov A.M., Matvienko G.G., Oshlakov V.K. Control of multiple filamentation of femtosecond laser pulses in air // Atmos. Ocean. Opt. 2020. V. 33, N 01. P. 42–50.
4. Braun A., Korn G., Liu X., Du D., Squier J., Mourou G. Self-channeling of high-peak-power femtosecond laser pulses in air // Opt. Lett. 1995. V. 20, N 1. P. 73–75.
5. Wille H., Rodriguez M., Kasparian J., Mondelain D., Yu J., Mysyrowicz A., Sauerbrey A.R., Wolf J.-P., Wöste L. Teramobile: A mobile femtosecond-terawattlaser and detection system // Eur. Phys. J.: Appl. Phys. 2002. V. 20. P. 183–190.
6. Kasparian J., Rodriguez M., Mejean G., Yu J., Salmon E., Wille H., Bourayou R., Frey S., André Y.B., Mysyrowicz A., Sauerbrey A.R., Wolf J.P., Wöste L. White-light filaments for atmospheric analysis // Sci. 2003. V. 301, N 5629. P. 61–64.
7. Theberge F., Liu W., Luo Q., Chin S.L. Ultrabroadband continuum generated in air (down to 230 nm) using ultrashort and intense laser pulses // Appl. Phys. B. 2005. V. 80, N 2. P. 221–225.
8. Bejot P.O., Bonacina L., Extermann J., Moret M., Wolf J.-P., Ackermann R., Lascoux N., Salamé R., Salmon E., Kasparian J., Berge L., Champeaux S., Guet C., Blanchot N., Bonville O., Boscheron A.C.L., Canal P., Castaldi M., Hartmann O., Lepage C., Marmande L., Mazataud E., Mennerat G., Patissou L., Prevot V., Raffestin D., Ribolzi J. 32 TW atmospheric white-light laser // Appl. Phys. Lett. 2007. V. 90. 151106. Р. 1–3.
9. Méchain G., Couairon A., Franco M., Prade B., Mysyrowicz A. Organizing multiple femtosecond filaments in air // Phys. Rev. Lett. 2004. V. 93, N 3. P. 1–4.
10. Fibich G., Eisenmann Sh., Ilan B., Zigler A. Control of multiple filamentation in air // Opt. Lett. 2004. V. 29, N 15. P. 1772–1774.
11. Kamali Y., Sun Q., Daigle J.-F., Azarm A., Bernhardt J., Chin S.L. Lens tilting effect on filamentation and filament-induced fluorescence // Opt. Commun. 2009. V. 282, iss. 5. P. 950–954.
12. Alonso B, Borrego-Varillas R., Sola Í.J., Varela Ó., Villamarín A., Collados V.M., San Román J., Bueno J.M., Roso L. Enhancement of filamentation postcompression by astigmatic focusing // Opt. Lett. 2011. V. 36, N 19. P. 3867–3869.
13. Fu Y., Gao H., Chu W., Ni J., Xiong H., Xu H., Yao J., Zeng B., Liu W., Cheng Y., Xu Z., Chin S.L. Control of filament branching in air by astigmatically focused femtosecond laser pulses // Appl. Phys B. 2011. V. 103. P. 435–439.
14. Dergachev A.A., Ionin A.A., Kandidov V.P., Mokrousova D.V., Seleznev L.V., Sinitsyn D.V., Sunchugasheva E.S., Shlenov S.A., Shustikova A.P. Plazmennye kanaly pri filamentatsii v vozduhe femtosekundnogo lazernogo izlucheniya s astigmatizmom volnovogo fronta // Kvant. elektron. 2014. V. 44, N 12. P. 1085–1093.
15. Apeksimov D.V., Gejnts Yu.E., Zemlyanov A.A., Kabanov A.M., Matvienko G.G., Oshlakov V.K. Filamentatsiya femtosekundnyh lazernyh impul'sov v vozduhe. Tomsk: IOA SO RAN, 2017. 161 p.
16. Xu Z., Zhu X., Yu Y., Zhang N., Zhao J. Super-luminescent jet light generated by femtosecond laser pulses // Sci. Rep. 2014. V. 4. 3892. Р. 1–7.
17. Ivanov N.G., Losev V.F., Prokop’ev V.E., Sitnik K.A. Generation of a highly directional supercontinuum in the visible spectrum range // Opt. Commun. 2017. V. 387. P. 322–327.
18. Ivanov N.G., Losev V.F., Lubenko D.M., Prokopiev V.E., Sitnik K.A. Forming of supercontinuum in the visible upon filamentation of a femtosecond pulse in air // Proc. SPIE. 2017. V. 10228. Р. 1–9.
19. Ivanov N.G., Losev V.F. Vliyanie kerrovskoj nelinejnosti na filamentatsiyu femtosekundnogo impul'sa izlucheniya v vozduhe // Optika atmosf. i okeana. 2017. V. 30, N 3. P. 198–203; Ivanov N.G., Losev V.F. Kerr nonlinearity effect on femtosecond pulse radiation filamentation in air // Atmos. Ocean. Opt. 2017. V. 30, N 4. P. 331–336.
20. Ivanov N.G., Losev V.F., Lubenko D.M., Prokop'ev V.E. Features of laser air filamentation at aberration focusing // Proc. SPIE. 2018. V. 10614. 06141D.
21. Theberge F., Liu W., Simard P.T., Becker A., Chin S.L. Plasma density inside a femtosecond laser filament in air: Strong dependence on external focusing // Phys. Rev. 2006. V. E74. P. 036406-1–7.