Applied Physics B

, Volume 112, Issue 1, pp 105–114 | Cite as

Characterization of sub-two-cycle pulses from a hollow-core fiber compressor in the spatiotemporal and spatiospectral domains

  • Benjamín Alonso
  • Miguel Miranda
  • Francisco Silva
  • Vladimir Pervak
  • Jens Rauschenberger
  • Julio San Román
  • Íñigo J. Sola
  • Helder Crespo


We have post-compressed 25 fs (Fourier limit) amplified pulses in an argon-filled hollow-core fiber. The output pulses were compressed using a pair of wedges and chirped mirrors down to 4.5 fs (Fourier limit of 4.1 fs), which corresponds to less than two optical cycles. We then performed the characterization of the pulses by combining the d-scan and the STARFISH techniques. The temporal (and spectral) measurement of the pulses is done with d-scan, which is used as the reference to extend the characterization to the spatiotemporal (and spatiospectral) amplitude and phase of the pulses by means of STARFISH. The post-compressed pulses at the output of the hollow-fiber had an energy of 150 μJ. The analysis of the pulses revealed larger spectral broadening and blue-shift, and shorter duration at the center of the beam. For the first time, we demonstrate the complete characterization of intense ultra-broadband pulses in the sub-two-cycle regime, which provides an improved insight into the properties (space–time and space–frequency) of the pulses and is highly relevant for their applications.


Second Harmonic Generation Spectral Phase Attosecond Pulse Reference Pulse Second Harmonic Generation Signal 
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We acknowledge support from Spanish Ministerio de Ciencia e Innovación (MICINN) through the Consolider Program SAUUL (CSD2007-00013), Research projects FIS2009-09522, and grant programs Formación de Profesorado Universitario (No. AP2007-00236 for B. Alonso) and Ramón y Cajal (for I.J. Sola); and from the Junta de Castilla y León through the Program for Groups of Excellence (GR27). H. Crespo acknowledges Fundos FEDER, through Programa Operacional Factores de Competitividade–COMPETE, and Fundação para a Ciência e a Tecnologia (FCT) under grants No. PTDC/FIS/115102/2009 and PTDC/FIS/122511/2010. M. Miranda and F. Silva acknowledge FCT and FEDER grants No. SFRH/BD/37100/2007 and SFRH/BD/69913/2010, respectively. M. Miranda also acknowledges support from the European Research Council (grant ALMA) and the Swedish Research Council. We also acknowledge support from Centro de Láseres Pulsados (CLPU), Salamanca, Spain.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Benjamín Alonso
    • 1
  • Miguel Miranda
    • 2
    • 3
  • Francisco Silva
    • 2
  • Vladimir Pervak
    • 4
    • 5
  • Jens Rauschenberger
    • 4
  • Julio San Román
    • 1
  • Íñigo J. Sola
    • 1
  • Helder Crespo
    • 2
  1. 1.Grupo de Investigación en Óptica Extrema (GIOE)Universidad de SalamancaSalamancaSpain
  2. 2.IFIMUP-IN and Departamento de Física e AstronomiaUniversidade do PortoPortoPortugal
  3. 3.Department of PhysicsLund UniversityLundSweden
  4. 4.UltraFast Innovations GmbHGarchingGermany
  5. 5.Department für PhysikLudwig-Maximilians-Universität MünchenGarchingGermany

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