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The powerful technique of optical parametric amplification (OPA) experienced a huge advance with the invention of optical parametric chirped pulse amplification (OPCPA) and later noncollinear OPA. In this paper, we describe a radically different approach of performing parametric interaction in the frequency domain instead of the time domain. The frequency domain is reached via optical Fourier transformation,...
By employing hollow-core fiber compression using a stretched flexible fiber, we achieved 2-cycles pulses centered on 1.8μm with more than 5mJ energy per pulse.
We investigate the behavior of resonant-induced harmonics from tin using driving lasers with tunable wavelengths. The intensity of the resonant harmonic is suppressed by the tuning laser wavelength around 1.8μm to understand the interaction dynamics of continuum electron with the autoionizing states.
Carbon molecules are used to generate intense high-order harmonics using driving lasers with 0.8 μm–1.71 μm wavelengths. By driving plasma of reduced size (∼200μm) with 1.71μm laser, we could extend the cutoff to ∼70eV, while reducing the peak intensity by only ∼31%.
Intense, few-cycle infrared laser pulses centered at 1.8 µm wavelength, coupled to a new gas cell design, are employed to drive high harmonic generation with high flux down to the soft X-ray regime.
800nm, nJ level pulses are amplified >2.000 times in a single 2mm BBO crystal, pumped by picosecond 400nm pulses. Experiments evidence that the picosecond pulse contrast within the pump window remains unchanged upon amplification.
Interferometric CEP control in a white light seeded optical parametric amplifier is demonstrated by relative phase shifting between white light and pump beam prior to their difference frequency generation, resulting in CEP controlled Idler pulses.
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