2008
DOI: 10.1364/oe.17.000062
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Generation of carrier-envelope-phase-stable 2-cycle 740-μJ pulses at 21-μm carrier wavelength

Abstract: We produce carrier-envelope-phase-stable 15.7-fs (2-cycle) 740-microJ pulses at the 2.1-microm carrier wavelength, from a three-stage optical parametric chirped-pulse amplifier system, pumped by an optically synchronized 49-ps 11-mJ Nd:YLF laser. A novel seed pulse spectral shaping method is used to ascertain the true amplified seed energy and the parametric superfluorescence levels.

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Cited by 126 publications
(100 citation statements)
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“…We mention that in addition to the rather clean temporal shape on the femtosecond time scale, the present approach is free of superfluorescence background as was reported in case of OPCPA. 5 When the seed is blocked in the OPA, no light is observed at the output of the fiber. FIG.…”
Section: Fig 1 ͑A͒mentioning
confidence: 99%
“…We mention that in addition to the rather clean temporal shape on the femtosecond time scale, the present approach is free of superfluorescence background as was reported in case of OPCPA. 5 When the seed is blocked in the OPA, no light is observed at the output of the fiber. FIG.…”
Section: Fig 1 ͑A͒mentioning
confidence: 99%
“…The key ingredient for reducing the pulse duration to few optical cycles at high power levels lies in additional spectral broadening through either (i) nonlinear propagation in hollow-core-fiber (HCF) [2] and laser-induced (co-)filaments [3][4][5] or (ii) ultrabroadband optical parametric amplification (OPA) [6] and OPCPA [7]. However, the main challenge remains in controlling the spectral phase of the ultrabroadband spectrum.…”
Section: Introductionmentioning
confidence: 99%
“…The generation of isolated attosecond pulses in the water window has an extremely vital significance for studying the ultrafast electronic dynamics of biological samples in water. With the rapid development in ultrafast laser technology, the intense ultrafast laser sources in the midinfrared region have been achieved [7][8][9][10] and have been employed experimentally [2,11], which makes it possible to realize the attosecond pulse generation in the water window. Several approaches have so far been proposed to achieve single attosecond pulses in this spectral region, including the detuned midinfrared two-color scheme [12], midinfrared polarization gating modulated by a weaker linearly polarized pulse [13,14], and the double optical gating with very high intensity [15].…”
Section: Introductionmentioning
confidence: 99%