Dispersive wave generation by solitons in microstructured optical fibers

Abstract

We study the nonlinear propagation of femtosecond pulses in the anomalous dispersion region of microstructured fibers, where soliton fission mechanisms play an important role. The experiment shows that the output spectrum contains, besides the infrared supercontinuum, a narrow-band 430-nm peak, carrying about one fourth of the input energy. By combining simulation and experiments, we explore the generation mechanism of the visible peak and describe its properties. The simulation demonstrates that the blue peak is generated only when the input pulse is so strongly compressed that the short-wavelength tail of the spectrum includes the wavelength predicted for the dispersive wave. In agreement with simulation, intensity-autocorrelation measurements show that the duration of the blue pulse is in the picosecond time range, and that, by increasing the input intensity, satellite pulses of lower intensity are generated.

All-fiber femtosecond Cherenkov source

“…When the CR signals emitted in the output power range from 1 mW to 2.5 mW, the AC FWHM are in the range 145 -225 fs. From the simulations [8,9] we can also estimate the pulse duration of the CR output generated from 10 cm NL-3.0-850 to be on the order of hundreds of femtoseconds, which matches our experimental results.…”

Supercontinuum generation and carrier envelope offset frequency measurement in a tapered single-mode fiber

“…As the pulse energy increases, Raman perturbation will affect soliton production which will shift toward longer wavelengths, extending the spectrum from 1,100 to 1,400 nm [22]. On the other hand, visible components will gradually appear under the impact of dispersive wave radiation [23,24]. The discrete peak around 600 nm is first observed at a coupled energy of 1.6 nJ.…”

Regularizing Aperiodic Cycles of Resonant Radiation in Filament Light Bullets

“…Second, the global temporal and spectral dynamics bears a significant resemblance to the periodic excitation of RR [48][49][50] in guided wave nonlinear optics. In the case of propagation in a fiber, a higher-order soliton experiences periodic compression cycles, leading to a periodic overlap of the spectrum with a phase-matched component in the normal dispersion regime.…”