Applied Physics B

, Volume 85, Issue 4, pp 525–529

The generation of intense, transform-limited laser pulses with tunable duration from 6 to 30 fs in a differentially pumped hollow fibre

  • J.S. Robinson
  • C.A. Haworth
  • H. Teng
  • R.A. Smith
  • J.P. Marangos
  • J.W.G. Tisch
Article

Abstract

We have investigated experimentally the energy transmission and spectral broadening of 30-fs, 700-μJ laser pulses in a neon-filled, 250-μm inner diameter hollow fibre. We implement a differentially pumped fibre, where a vacuum is maintained at the fibre entrance, and compare this to a statically filled fibre. We obtain significantly higher transmission and increased spectral broadening in the differentially pumped case due to a reduction of ionisation defocusing at the fibre entrance. This arrangement provides a method for the generation of near-transform- limited pulses with smoothly varying pulse duration whilst maintaining constant pulse energy, by simple adjustment of the gas pressure. Compression of ∼450-μJ pulses from the differentially pumped fibre to a duration of 6.5 fs has been achieved for pulses with spectra spanning 650–900 nm, by use of negatively dispersive chirped mirrors.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • J.S. Robinson
    • 1
  • C.A. Haworth
    • 1
  • H. Teng
    • 1
  • R.A. Smith
    • 1
  • J.P. Marangos
    • 1
  • J.W.G. Tisch
    • 1
  1. 1.Blackett LaboratoryImperial College LondonLondonUK

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