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In 2011, Dual-chirped optical parametric amplification (DC-OPA) [1] had been proposed theoretically as one of the OPA method. Y. Fu et al. experimentally demonstrated DC-OPA in 2015 and generated 10-mJ IR pulses energy in 1–2 um region [2, 3]. At present, DC-OPA method is ready to extend up to THz region [4].
We present an energy-scaling experiment on a femtosecond infrared pulse using dual-chirped optical parametric amplification (DC-OPA). A total output energy exceeding 100 mJ with 36-fs pulse duration was achieved in the infrared region, which is the highest energy ever reported for an ultrafast optical parametric amplifier scheme. We also discuss the generation of high-energy 15–30–THz pulses through...
We generated 100 mJ infrared pulses using dual-chirped optical parametric amplification (DC-OPA), which is the highest energy ever reported for an infrared femtosecond laser source. These pulses are very useful for strong-field physics research and energy scaling of sub-keV soft X-rays by high-order harmonic generation.
We propose a method to monochromatize high-order harmonics to isolate a single beam of harmonic radiation comprising femtosecond pulses. This novel method uses a multilayer-mirror approach, and has broadband tunability and high reflectivity in the soft-x-ray region.
We proposed a new gating scheme, called infrared double optical gating for producing isolated attosecond pulses. It was shown that CEP stabilization is not required even though a multicycle driving pulse is used.
A dual-chirped optical parametric amplification scheme for generating ultrafast high-power IR pulse is proposed. Using this scheme, we can expect the generation of TW-class IR pulses in 1 ∼ 2 μm.
By mixing two infrared laser pulses of different wavelengths, we generate the continuum harmonic spectrum around a cut-off region. Our obtained harmonic spectra clearly show the possibility of generating isolated attosecond pulses from many-cylse laser pulse.
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