Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Letter
  • Published:

A high-intensity highly coherent soft X-ray femtosecond laser seeded by a high harmonic beam

Abstract

Synchrotrons have for decades provided invaluable sources of soft X-rays, the application of which has led to significant progress in many areas of science and technology. But future applications of soft X-rays—in structural biology, for example—anticipate the need for pulses with much shorter duration (femtoseconds) and much higher energy (millijoules) than those delivered by synchrotrons. Soft X-ray free-electron lasers1 should fulfil these requirements but will be limited in number; the pressure on beamtime is therefore likely to be considerable. Laser-driven soft X-ray sources offer a comparatively inexpensive and widely available alternative, but have encountered practical bottlenecks in the quest for high intensities. Here we establish and characterize a soft X-ray laser chain that shows how these bottlenecks can in principle be overcome. By combining the high optical quality available from high-harmonic laser sources (as a seed beam) with a highly energetic soft X-ray laser plasma amplifier, we produce a tabletop soft X-ray femtosecond laser operating at 10 Hz and exhibiting full saturation, high energy, high coherence and full polarization. This technique should be readily applicable on all existing laser-driven soft X-ray facilities.

This is a preview of subscription content, access via your institution

Access options

Buy this article

Prices may be subject to local taxes which are calculated during checkout

Figure 1
Figure 2: Experimental spectra under various conditions.
Figure 3: Calculated line shapes for the HHG (seed), the ASE SXRL, and the seeded SXRL for two levels of seeding.
Figure 4: Three-dimensional images (false colour) of the seeded SXRL cross-section as recorded by the soft X-ray CCD detector after reflection on the monochromatic soft X-ray mirror.
Figure 5: Variation of the HHG (open diamond) and seeded SXRL (black square) intensities versus the angle of polarization.

Similar content being viewed by others

References

  1. Ayvazyan, A. et al. A new powerful source for coherent VUV radiation: Demonstration of exponential growth and saturation at the TTF free-electron laser. Eur. Phys. J. D 20, 149–156 (2002)

    Article  ADS  CAS  Google Scholar 

  2. Ditmire, T. et al. Amplification of xuv harmonic radiation in a gallium amplifier. Phys. Rev. A 51(6), R4337–R4340 (1995)

    Article  ADS  CAS  Google Scholar 

  3. Rus, B. et al. Demonstration of amplification of a polarized soft-x-ray laser beam in a neonlike germanium plasma. Phys. Rev. A 51(3), 2316–2327 (1995)

    Article  ADS  CAS  Google Scholar 

  4. Rocca, J. J. Table top soft x-ray lasers. Rev. Sci. Instrum. 70, 3799–3827 (1999)

    Article  ADS  CAS  Google Scholar 

  5. Daido, H. Review of soft x-ray laser researches and developments. Rep. Prog. Phys. 65, 1513–1575 (2002)

    Article  ADS  CAS  Google Scholar 

  6. Plowes, J. A., Pert, G. J. & Holden, P. B. Refraction compensation by target curvature in X-ray laser. Opt. Commun. 116, 260–268 (1995)

    Article  ADS  CAS  Google Scholar 

  7. Kazamias, S. et al. Global optimization of high harmonic generation. Phys. Rev. Lett. 90, 193901 (2003)

    Article  ADS  CAS  Google Scholar 

  8. Sebban, S. et al. Demonstration of a Ni-like Kr optical-field-ionization at 32.8 nm. Phys. Rev. Lett. 89, 253901 (2002)

    Article  ADS  CAS  Google Scholar 

  9. Sebban, S. et al. Saturated amplification of a collisionally pumped optical-field-ionization soft X-ray laser at 41.8 nm. Phys. Rev. Lett. 86, 3004–3007 (2001)

    Article  ADS  CAS  Google Scholar 

  10. Siegman, A. E. Lasers (Univ. Science Books, Mill Valley, California, 1986)

    Google Scholar 

  11. Sebban, S. et al. Investigations of collisionally pumped optical field ionization soft-x-ray lasers. J. Opt. Soc. Am. B 20(1), 195–202 (2003)

    Article  ADS  CAS  Google Scholar 

  12. Smith, R. et al. Longitudinal coherence measurements of the transient collisional X-ray laser. Opt. Lett. 28(22), 2261–2263 (2003)

    Article  ADS  Google Scholar 

  13. Casperson, L. W. & Yariv, A. Spectral narrowing in high-gain lasers. IEEE J. Quant. Electr. 8(2), 80–85 (1972)

    Article  ADS  Google Scholar 

  14. Lemoff, B. E., Barty, C. P. J. & Harris, S. E. Femtosecond-pulse-driven, electron-excited XUV lasers in eight-times-ionized noble gases. Opt. Lett. 19(8), 569–571 (1994)

    Article  ADS  CAS  Google Scholar 

  15. Mocek, T. et al. Characterization of collisionally pumped optical-field-ionization soft x-ray lasers. Appl. Phys. B 78, 939–944 (2004)

    Article  ADS  CAS  Google Scholar 

  16. Takahashi, E. et al. Generation of high-energy high-order harmonics by use of a long interaction medium. J. Opt. Soc. Am. B 20(1), 158–165 (2003)

    Article  ADS  CAS  Google Scholar 

  17. Mocek, T. et al. Significant improvement of the 41.8 nm Xe8+ laser using gas-filled capillary tubes. In Proc. 9th Int. Conf. on X-ray Lasers, 24–28 May 2004, Beijing, China (in the press).

  18. Gibson, E. et al. High-order harmonic generation up to 250 eV from highly ionized Argon. Phys. Rev. Lett. 92(3), 033001 (2004)

    Article  ADS  Google Scholar 

  19. McGowan, B. J. et al. Demonstration of x-ray amplifiers near the carbon K edge. Phys. Rev. Lett. 65, 420–423 (1990)

    Article  ADS  Google Scholar 

  20. Lee, D. G., Kim, J. H., Hong, K. H. & Nam, C. H. Coherent control of high-order harmonics with chirped femtosecond laser pulses. Phys. Rev. Lett. 87(24), 243902 (2001)

    Article  ADS  CAS  Google Scholar 

  21. Reitze, D. H. Enhancement of high-order harmonic generation at tuned wavelengths through adaptative control. Opt. Lett. 29(1), 86–88 (2004)

    Article  ADS  Google Scholar 

Download references

Acknowledgements

We thank J. L. Charles for technical support. T.M. was supported by the Marie Curie Individual Fellowship of the European Commission.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Ph. Zeitoun.

Ethics declarations

Competing interests

The authors declare that they have no competing financial interests.

Supplementary information

Supplementary Discussion

The choice of the Optical Field Ionisation amplifier among all the x-ray lasers developed up to now has been done according to several precise criteria, discussed in this text. (DOC 26 kb)

Supplementary Figure

This figure shows the amplification law as measured with plasma lenghts ranging from 0 up to 6 mm. Comparison between the ASE and the seeded x-ray laser intensities is shown. (DOC 161 kb)

Rights and permissions

Reprints and permissions

About this article

Cite this article

Zeitoun, P., Faivre, G., Sebban, S. et al. A high-intensity highly coherent soft X-ray femtosecond laser seeded by a high harmonic beam. Nature 431, 426–429 (2004). https://doi.org/10.1038/nature02883

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1038/nature02883

This article is cited by

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing