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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CG_2_2

Passive coherent combining of CEP-stable few-cycles pulses from a temporally divided hollow fiber compressor

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Abstract

One of the most popular techniques used for producing high spatial quality few-cycle pulses is nonlinear spectral broadening of many-cycle pulses in a gas-filled hollow-core fiber (HCF) followed by temporal compression with chirped mirrors [1]. However, as the input pulse energy approaches the mJ level, the transmission of hollow fibers rapidly drops with the onset of self-focusing and ionization so efficient scaling of this technique beyond the mJ still remains a challenge. As shown by a recent theoretical study [2], a way to overcome this limitation is to divide the input pulse into several lower energy replicas that can be subsequently recombined after independent spectral broadening in the HCF. To date, the shortest pulse duration obtained by coherent combining is 23 fs [3].

© 2015 IEEE

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