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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 7 — Apr. 8, 2013
  • pp: 8746–8752

Identification of the physical mechanism of generation of coherent N2+ emissions in air by femtosecond laser excitation

Jielei Ni, Wei Chu, Chenrui Jing, Haisu Zhang, Bin Zeng, Jinping Yao, Guihua Li, Hongqiang Xie, Chaojin Zhang, Huailiang Xu, See-Leang Chin, Ya Cheng, and Zhizhan Xu  »View Author Affiliations

Optics Express, Vol. 21, Issue 7, pp. 8746-8752 (2013)

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Recently, amplification of harmonic-seeded radiation generated through femtosecond laser filamentation in air has been observed, giving rise to coherent emissions at wavelengths corresponding to transitions between different vibrational levels of the electronic B2Σu+ and X2Σg+ states of molecular nitrogen ions [Phys. Rev. A. 84, 051802(R) (2011)]. Here, we carry out systematic investigations on its physical mechanism. Our experimental results do not support the speculation that such excellent coherent emissions could originate from nonlinear optical processes such as four-wave mixing or stimulated Raman scattering, leaving stimulated amplification of harmonic seed due to the population inversion generated in molecular nitrogen ions the most likely mechanism.

© 2013 OSA

OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(260.5950) Physical optics : Self-focusing

ToC Category:
Nonlinear Optics

Original Manuscript: February 6, 2013
Revised Manuscript: March 13, 2013
Manuscript Accepted: March 25, 2013
Published: April 2, 2013

Jielei Ni, Wei Chu, Chenrui Jing, Haisu Zhang, Bin Zeng, Jinping Yao, Guihua Li, Hongqiang Xie, Chaojin Zhang, Huailiang Xu, See-Leang Chin, Ya Cheng, and Zhizhan Xu, "Identification of the physical mechanism of generation of coherent N2 + emissions in air by femtosecond laser excitation," Opt. Express 21, 8746-8752 (2013)

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  1. A. Couairon and A. Mysyrowicz, “Femtosecond filamention in transparent media,” Phys. Rep.441(2-4), 47–189 (2007). [CrossRef]
  2. S. L. Chin, S. A. Hosseini, W. Liu, Q. Luo, F. Théberge, N. Aközbek, A. Becker, V. P. Kandidov, O. G. Kosareva, and H. Schroeder, “The propagation of powerful femtosecond laser pulses in optical media: physics, applications, and new challenges,” Can. J. Phys.83(9), 863–905 (2005). [CrossRef]
  3. L. Bergé, S. Skupin, R. Nuter, J. Kasparian, and J.-P. Wolf, “Ultrashort filaments of light in weakly ionized, optically transparent media,” Rep. Prog. Phys.70(10), 1633–1713 (2007). [CrossRef]
  4. M. Rodriguez, R. Bourayou, G. Méjean, J. Kasparian, J. Yu, E. Salmon, A. Scholz, B. Stecklum, J. Eislöffel, U. Laux, A. P. Hatzes, R. Sauerbrey, L. Wöste, and J.-P. Wolf, “Kilometer-range nonlinear propagation of femtosecond laser pulses,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys.69(3), 036607 (2004). [CrossRef] [PubMed]
  5. K. Stelmaszczyk, P. Rohwetter, G. Mejean, J. Yu, E. Salmon, J. Kasparian, R. Ackermann, J. P. Wolf, and L. Woste, “Long-distance remote laser-induced breakdown spectroscopy using filamentation in air,” Appl. Phys. Lett.85(18), 3977–3979 (2004). [CrossRef]
  6. H. Xu, H. Xiong, R. Li, Y. Cheng, Z. Xu, and S. L. Chin, “X-shaped third harmonic generated by ultrashort infrared pulse filamentation in air,” Appl. Phys. Lett.92(1), 011111 (2008). [CrossRef]
  7. M. Kolesik, E. M. Wright, and J. V. Moloney, “Dynamic nonlinear X waves for femtosecond pulse propagation in water,” Phys. Rev. Lett.92(25), 253901 (2004). [CrossRef] [PubMed]
  8. N. Aközbek, A. Iwasaki, A. Becker, M. Scalora, S. L. Chin, and C. M. Bowden, “Third-harmonic generation and self-channeling in air using high-power femtosecond laser pulses,” Phys. Rev. Lett.89(14), 143901 (2002). [CrossRef] [PubMed]
  9. F. Théberge, N. Aközbek, W. Liu, A. Becker, and S. L. Chin, “Tunable ultrashort laser pulses generated through filamentation in gases,” Phys. Rev. Lett.97(2), 023904 (2006). [CrossRef] [PubMed]
  10. J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multiwavelength remote laser in air,” Phys. Rev. A84(5), 051802 (2011). [CrossRef]
  11. Q. Luo, W. Liu, and S. L. Chin, “Lasing action in air induced by ultra-fast laser filamentation,” Appl. Phys. B76(3), 337–340 (2003). [CrossRef]
  12. A. Dogariu, J. B. Michael, M. O. Scully, and R. B. Miles, “High-gain backward lasing in air,” Science331(6016), 442–445 (2011). [CrossRef] [PubMed]
  13. D. Kartashov, S. Ališauskas, G. Andiukaitis, A. Pugžlys, M. Shneider, A. Zheltikov, S. L. Chin, and A. Baltuška, “Free-space nitrogen gas laser driven by a femtosecond filament,” Phys. Rev. A86(3), 033831 (2012). [CrossRef]
  14. L. Yuan, K. E. Dorfman, A. M. Zheltikov, and M. O. Scully, “Plasma-assisted coherent backscattering for standoff spectroscopy,” Opt. Lett.37(5), 987–989 (2012). [CrossRef] [PubMed]
  15. W. Chu, B. Zeng, J. Yao, H. Xu, J. Ni, G. Li, H. Zhang, F. He, C. Jing, Y. Cheng, and Z. Xu, “Multiwavelength amplified harmonic emissions from carbon dioxide pumped by mid-infrared femtosecond laser pulses,” Europhys. Lett.97(6), 64004 (2012). [CrossRef]
  16. J. Ni, W. Chu, H. Zhang, C. Jing, J. Yao, H. Xu, B. Zeng, G. Li, C. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “Harmonic-seeded remote laser emissions in N₂-Ar, N₂-Xe and N₂-Ne mixtures: a comparative study,” Opt. Express20(19), 20970–20979 (2012). [CrossRef] [PubMed]
  17. S. L. Chin, H. Xu, Y. Cheng, Z. Xu, and K. Yamanouchi, “Natural population inversion in a gaseous molecular filament,” Chin. Opt. Lett.11(1), 013201–013203 (2013). [CrossRef]
  18. J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of strong and coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys.15(2), 023046 (2013). [CrossRef]
  19. A. H. Chin, O. G. Calderón, and J. Kono, “Extreme midinfrared nonlinear optics in semiconductors,” Phys. Rev. Lett.86(15), 3292–3295 (2001). [CrossRef] [PubMed]
  20. S. L. Chin, Femtosecond Laser Filamentation (Springer, Berlin, 2010).
  21. R. W. Boyd, M. G. Raymer, P. Narum, and D. J. Harter, “Four-wave parametric interactions in a strongly driven two-level system,” Phys. Rev. A24(1), 411–423 (1981). [CrossRef]
  22. A. S. Kwok and R. K. Chang, “Stimulated resonance Raman scattering of Rhodamine 6G,” Opt. Lett.18(20), 1703–1705 (1993). [CrossRef] [PubMed]
  23. I. M. Littlewood and C. E. Webb, “Excitation mechanisms of the N2+ laser,” J. Phys. D Appl. Phys.14(7), 1195–1206 (1981). [CrossRef]

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