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We report an experimental study of pulsed Raman gain in As2Se3 chalcogenide fiber, for pump pulses between 1470 nm and 1560 nm, achieving the highest Raman gain at the longest pump wavelength, where two-photon absorption is lowest.
We demonstrate broadband spectral phase conjugation based on temporal imaging via four-wave mixing and show for the first time compensation of pulse distortions due to second- and third-order dispersion and self-phase modulation.
The polarization evolution of stimulated Brillouin scattering amplified signals in the presence of fiber birefringence is examined in analysis, simulation and experiment. The signal polarization is drawn towards the conjugate of the pump polarization.
Four-wave mixing between a coherent laser signal and incoherent pump in highly nonlinear fiber are investigated theoretically and experimentally, and the effect of incoherence pump on signal is studied.
A novel Er:fiber/Ti:sapphire hybrid laser generates phase-locked few-cycle terahertz transients tunable from 1 to 107 THz and electric fields of up to 108 MV/cm. 8-fs pulses from the fiber laser serve as electro-optic probe.
We report the experimental demonstration of pulsed-pump wavelength exchange for all-optical time de-multiplexing of 160-Gb/s RZ signals. Power penalty les 2.7 dB at 10-9 was achieved for all de-multiplexed 10-Gb/s RZ signals.
We report on a fiber CPA system producing 100 muJ energy pulses with quasi transform limited duration of 267 fs at a repetition rate of 300 kHz leading to a peak power of 345 MW.
We demonstrate a Fabry-Perot cavity, passively saturable-absorber-modelocked Yb-fiber femtosecond oscillator with up to 1.04 GHz fundamental repetition rate, enabling octave spanning continuum generation and self-referenced fCEO stabilization.
By exploiting optical parametric generation in periodically poled lithium niobate driven by a Yb:KYW laser, we realized a two-colour pump-probe system in the near- and mid-infrared with 1-MHz repetition rate, 300-fs resolution and 10-5 sensitivity.
We demonstrate a high-peak-power, 1-kHz, 2.2-mum OPCPA for long-wavelength-driven high harmonic generation that produces 9-GW, 3-optical-cycle, CEP-stabilized pulses, allowing tunneling-ionization-threshold intensity with low Guoy phase shift.
Based on coupled-mode equations, we develop a pump interaction model for two-pump phase sensitive optical amplifiers. This model takes dominant pump-pump and signal-pump four-wave mixing sidebands into account, and can be used to determine the optimal wavelength separation when amplifiers' parameters such as pump power, fiber nonlinearity coefficient, length, and dispersion profile are given.
Single 4-mJ supercontinuum filaments supporting 8-fs pulses are generated by focusing ultrashort pulses from a four-stage KTP-OPCPA into a noble-gas cell. The use of a 1.6-mum wavelength permits efficient energy scaling in the single-filament regime.
We present two scaling concepts for fiber based system. Ultrashort pulses with high peak power are generated while maintaining the advantages of fiber laser systems such as high repetition rate and good beam quality.
We demonstrate a mid-infrared optical parametric chirped-pulse amplifier with a pulse energy of 1 muJ at 100 kHz repetition rate. Its output is compressed to 92 fs by a prism compressor and characterized by SHG-FROG.
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