Abstract

We present experimental results, which show that the up-chirp of dispersively stretched femtosecond pulses decreases linearly with increasing pulse energy after amplification in Erbium-doped fibers. For 6 μJ output pulses a nonlinear dispersion of -4 • 106 fs2 was measured. This nonlinear dispersive effect is attributable to the resonant dispersion of the Erbium-ions and the decrease of the inversion during pulse amplification and was about one order of magnitude larger than predicted by the literature. Most likely this deviation is attributable to the complex population dynamics of the Er3+-ions during pulse amplification, since in the literature the relation between the refractive index and Er3+-inversion was described for a quasi-static population distribution. Due to the high resonant dispersion the required compressor dispersion for minimum output pulse duration depends strongly on the output pulse energy in Erbium-doped fiber-based chirped-pulse-amplifier set-ups.

© 2005 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |

  1. M. F. Fermann, A. Galvanauskas, G. Sucha, Ultrafast Lasers, Marcel Dekker, New York (2003)
  2. C. J. S. de Matos and J. R. Taylor, "Multi-kilowatt, all-fiber integrated chirped-pulse amplification system yielding 40× pulse compression using air-core fiber and conventional erbium-doped fiber amplifier," Opt. Express 12, 405 (2004), <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-3-405">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-3-405</a>
    [CrossRef] [PubMed]
  3. M. B. Hoffmann, J. A. Buck, "Erbium resonance-based dispersion effects on subpicosecond pulse propagation in fiber amplifiers: analytical studies," J. Opt. Soc. Am. B 13, 2012 (1996)
    [CrossRef]
  4. K. Tamura, L. E. Nelson, H. A. Haus, E. P. Ippen, "Soliton versus nonsoliton operation of fiber ring lasers," Appl. Phys. Lett. 64, 149 (1994)
    [CrossRef]
  5. P. Adel, Pulsed fiber lasers, (Cuvillier, Göttingen, 2004), ISBN: 3865371469
  6. G. P. Agrawal, Nonlinear Fiber Optics, Academic Press, San Diego, Second Edition (1995), ISBN: 0120451433
  7. J. Diels, Ultrashort laser pulse phenomena, (Academic Press, San Diego,1995) ISBN: 0122154924
  8. A. Liem, J. Limpert, H. Zellmer, A. Tünnermann, D. Nickel, U. Griebner, G. Korn, S. Unger, "High Energy Ultrafast Fiber-CPA System," OSA Trends in Optics and Photonics Vol. 50, Advanced Solid State Lasers, 111-113 (2001)
  9. J. C. M. Diels, J. J. Fontaine, I. C. McMichael, F. Simoni, "Control and measurement of ultrashort pulse shapes (in amplitude and phase) with femtosecond accuracy," Appl. Opt. 24, 1270 (1985)
    [CrossRef] [PubMed]
  10. O. L. Antipov, O. E. Eremykin, A. P. Salvikin, V. A. Vorob'ev, D.V. Bredikhin, M. S. Kuznetsov, "Electronic Changes of Refractive Index in Intensively Pumped Nd:YAG Laser Crystals," IEEE J. Quantum Electron. 39, 910 (2003)
    [CrossRef]
  11. J. W. Arkwright, P. Elango, G. R. Atkins, T. Whitbread, M. J. F. Digonnet, "Experimental and Theoretical Analysis of the Resonant Nonlinearity in Ytterbium-Doped Fiber," J. Lightwave Technol. 16, 798 (1998)
    [CrossRef]

Appl. Opt. (1)

Appl. Phys. Lett. (1)

K. Tamura, L. E. Nelson, H. A. Haus, E. P. Ippen, "Soliton versus nonsoliton operation of fiber ring lasers," Appl. Phys. Lett. 64, 149 (1994)
[CrossRef]

IEEE J. Quantum Electron. (1)

O. L. Antipov, O. E. Eremykin, A. P. Salvikin, V. A. Vorob'ev, D.V. Bredikhin, M. S. Kuznetsov, "Electronic Changes of Refractive Index in Intensively Pumped Nd:YAG Laser Crystals," IEEE J. Quantum Electron. 39, 910 (2003)
[CrossRef]

J. Lightwave Technol. (1)

J. Opt. Soc. Am. B (1)

Opt. Express (1)

OSA Trends in Optics and Photonics (1)

A. Liem, J. Limpert, H. Zellmer, A. Tünnermann, D. Nickel, U. Griebner, G. Korn, S. Unger, "High Energy Ultrafast Fiber-CPA System," OSA Trends in Optics and Photonics Vol. 50, Advanced Solid State Lasers, 111-113 (2001)

Other (4)

M. F. Fermann, A. Galvanauskas, G. Sucha, Ultrafast Lasers, Marcel Dekker, New York (2003)

P. Adel, Pulsed fiber lasers, (Cuvillier, Göttingen, 2004), ISBN: 3865371469

G. P. Agrawal, Nonlinear Fiber Optics, Academic Press, San Diego, Second Edition (1995), ISBN: 0120451433

J. Diels, Ultrashort laser pulse phenomena, (Academic Press, San Diego,1995) ISBN: 0122154924

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (3)

Fig. 1.
Fig. 1.

Schematic set-up of the two-stage Erbium-doped fiber amplifier and the grating compressor.

Fig. 2.
Fig. 2.

Left diagram: Compressor dispersion for pulse compression versus amplifier output pulse energy for three different pulse repetition rates. The compressor dispersion was measured relative to the setting for the asymptotic limit for 0 μJ pulse energy. Right diagram: Amplifier output spectrum for output pulse energies of 0.9 μJ, 3.7 μJ and 6.3 μJ (200 kHz repetition rate).

Fig. 3.
Fig. 3.

Left diagram: Interferometric autocorrelation for an output pulse energy of 0.9 μJ. The compressor was adjusted for a dispersion slope of -28.9 fs and minimum pulse duration. Right diagram: Pulse duration versus pulse energy.

Metrics