Source: http://proxy.osapublishing.org/ol/abstract.cfm?uri=ol-42-10-2014
Timestamp: 2019-04-24 17:08:57+00:00

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We report on a multi-petawatt 3-cascaded all-optical parametric chirped-pulse amplification laser facility. The experimental results demonstrate that the maximum energy after the final amplifier and after the compressor is 168.7 J and 91.1 J, respectively. The pulse width (FWHM) is 18.6 fs in full width at half maximum after optimization of pulse compression. Therefore, 4.9 PW peak power has been achieved for the laser facility. To the best of our knowledge, this is the highest peak power reported so far for an all-optical parametric chirped-pulse amplification facility, and a compressed pulse shorter than 20 fs is achieved in a PW-class laser facility for the first time.
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Fig. 1. Schematic of the CAEP-PW laser facility.
Fig. 2. Typical output spectrum of three amplifiers.
Fig. 3. Amplified energies and conversion efficiency of OPA-2.
Fig. 4. Amplified energies and conversion efficiency of OPA-3.
Fig. 5. Near-field profile after OPA-3.
Fig. 6. Compressed duration of 18.6 fs (single-shot autocorrelation trace, by applying a Gaussian deconvolution factor).
Fig. 7. Temporal profile after the compressor measured by a single-shot third-order autocorrelator.
Fig. 8. Focal spot images before (a) and after correction (b).

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