Vol. 29, issue 02, article # 7

Ivanov N. G., Losev V. F., Prokop'ev V. E., Sitnik K. A. Superradiance on ions of molecular nitrogen in filaments. // Optika Atmosfery i Okeana. 2016. V. 29. No. 02. P. 128–132. DOI: 10.15372/AOO20160207 [in Russian].
Copy the reference to clipboard

Abstract:

The experimental results of the study of population inversion in the resonant electronic transition B3Пg-A3u+ of nitrogen ions by optical pump of air and pure nitrogen by a femtosecond laser pulse at a wavelength of 950 nm are presented. It is shown that the inversion results from selective settling of N2+ (B2u+,ν´=0) excited state during multiphoton excitation of the autoionization state of the nitrogen molecule with energy of 18.7 eV. Seed photons for superradiance at transitions of molecular nitrogen ions are photons of the axial supercontinuum occurring in a filament at the corresponding wavelengths. The mode of the superradiance at the wavelength λ = 358.4 nm, referred to the transition of the CN molecules, was implemented.

Keywords:

filament, population inversion, femtosecond laser pulse, multiphoton ionization, molecule, ions

References:

  1. Heard H.G. Ultra-violet Gas Laser at Room Temperature // Nature. 1963. V. 200. P. 667–672.
  2. Svedberg A., Hogborg L., Nilssоn R. Observation of superradiant laser action in spark discharges in air at atmospheric pressure // Appl. Phys. Lett. 1968. V. 12, N 3. P. 102–108.
  3. Antonov V.C., Knyazev I.N., Movshev V.G. Generation UV nitrogen laser in the open air of the cuvette with transverse excitation // Quantum Electron. 1974. V. 1, N 2. P. 433–435.
  4. Searles S.K. Superfluorescent laser emission from electron-beam pumped Ar + N2 mixtures // Appl. Phys. Lett. 1974. V. 25, N 12. P. 735–737.
  5. Collins C.B., Conningham A.J., Curry S.M. Stimulated emission from charge-transfer reactions in the afterglow of an e-beam discharge in N2 + He high pressure mixtures // Appl. Phys. Lett. 1974. V. 24, N 10. P. 477–478.
  6. Ishchenko V.N., Lisitsyn V.N., Razhev A.M., Starinsky V.N., Chapovsky P.L. The N2+ Laser // Opt. Commun. 1975. V. 13, N 3. P. 231–234.
  7. Luo Q., Lu W., Chin S.L. Lasing action in air induced by ultra-fast laser filamentation // Appl. Phys. B. 2003. V. 76, N 3. P. 337–340.
  8. Kartashov D., Alisauskas S., Andriukaitis G., Pugzlys A., Shneider M., Zheltikov A., Chin S.L., Baltuška A. Free-space nitrogen gas laser driven by a femtosecond filament // Phys. Rev. A. 2012. V. 86. 033831.
  9. Shneider M.N., Bakuška A., Zheltikov A.M. Population inversion of molecular nitrogen in an Ar : N2 mixture by selective resonance-enhanced multiphoton ionization // J. Appl. Phys. 2011. V. 110. 083112.
  10. Yao J., Zeng B., Xu H., Li G., Chu W., Ni J., Zhang H., Chin S.L., Cheng Y., Xu Z. High-brightness switchable multiwavelength remote laser in air // Phys. Rev. A. 2011. V. 84, N 5. 051802.
  11. Ni J., Chu W., Jing C., Zhang H., Zeng B., Yao J., Li G., Xie H., Zhang C., Xu H., Chin S.L., Cheng Y., Xu Z. Identification of the physical mechanism of gene-ration of coherent N2 emissions in air by femtosecond laser excitation // Opt. Express. 2013. V. 21, N 7. P. 8746–8752.
  12. Yao J., Li G., Jing C., Zeng B., Chu W., Ni J., Zhang H., Xie H., Zhang C., Li H., Xu H., Chin S.L., Cheng Y., Xu Z. Remote creation of coherent emissions in air with two-color ultrafast laser pulses // New J. Phys. 2013. V. 15, N 2. 023046.
  13. Prokopiev V.E., Ivanov N.G., Krivonosenko D.A., Losev V.F. A study of elementary physical processes in the plasma regions filamentation and optical breakdown in the propagation of fs laser pulses with a wavelength of 950 nm in air at atmospheric pressure // Program of V Russian Conference «The interaction of highly concentrated flows of energy materials in advanced technology and medicine». Novosibirsk, 26–29 March 2013. Новосибирск: Изд-во ООО «Параллель», 2013. P. 6.
  14. Prokopev V.E., Ivanov N.G., Krivonosenko D.A., Losev V.F. Iinvestigation of the elementary physical processes in plasma of filamentation and optical breakdown regions accompanying the propagation of the femtosecond laser pulse with wavelength of 950 nm in air at atmospheric pressure // Russian Phys. J. 2014. V. 56, N 11. P. 1274–1280.
  15. Liu Yi., Brelet Y., Point G., Houard A., Mysyrowicz A. Self-seeded lasing in ionized air pumped by 800 nm femtosecond laser pulses // Opt. Express. 2013. V. 21, N 19. P. 22791–22798.
  16. Wang Tie-Jun, Ju Jingjing, Daigle Jean-Francois, Yuan Shuai, Li Ruxin, See Leang Chin. Self-seeded forward lasing action from a femtosecond Ti:Sapphire laser filament in air // Laser Phys. Lett. 2013. V. 10, N 12. P. 1–4.
  17. Tie-Jun Wang, Jean-Francois Daigle, Jingjing Ju, Shuai Yuan, Ruxin Li, See Leang Chin. Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air // Phys. Rev. A. 2013. V. 88, iss. 5. 053429 (5 p).
  18. Alekseev S.V., Ivanov N.G., Koval'chuk B.M., Losev V.F., Mesjac G.A., Miheev L.D., Panchenko Ju.N., Ratahin N.A., Jastremskij A.G. Teravattnaja gibridnaja lazernaja sistema THL-100 na baze fotodissocionnogo XeF(S–A) usilitelja // Optika atmosf. i okeana. 2012. V. 25, N 3. P. 221–225.
  19. Alekseev S.V., Aristov A.I., Ivanov N.G., Kovalchuk B.M., Losev V.F., Mesyats G.A., Mikheev L.D., Panchenko Yu.N., Ratakhin N.A. Multiterawatt femtosecond laser system in the visible with photochemically driven XeF(C–A) boosting amplifier // Laser Part. Beams. 2013. V. 31, N 1. P. 17–21.
  20. Alekseev S.V., Ivanov M.V., Ivanov N.G., Losev V.F., Mesjac G.A., Panchenko Ju.N., Ratahin N.A. Parametry gibridnoj femtosekundnoj lazernoj sistemy THL-100 posle modernizacii // Izv. vuzov. Fiz. 2015. V. 58, N 8. P. 50–54.
  21. Madden R.P., Parr A.G. Resonance phenomena in molecular photoionization: Impact of synchrotron radiation // Appl. Optics. 1982. V. 21, N 2. P. 179–188.