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

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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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Authors and Affiliations

  1. Blackett Laboratory, Imperial College London, London, SW7 2BW, UK

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

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  1. J.S. Robinson
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  2. C.A. Haworth
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  3. H. Teng
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  4. R.A. Smith
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  5. J.P. Marangos
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  6. J.W.G. Tisch
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Correspondence to J.S. Robinson.

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PACS

42.65.Re; 42.65.Jx; 42.65.-k

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Robinson, J., Haworth, C., Teng, H. et al. The generation of intense, transform-limited laser pulses with tunable duration from 6 to 30 fs in a differentially pumped hollow fibre. Appl. Phys. B 85, 525–529 (2006). https://doi.org/10.1007/s00340-006-2390-z

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  • DOI: https://doi.org/10.1007/s00340-006-2390-z

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