All-fiber source of 20-fs pulses at 1550 nm using two-stage linear-nonlinear compression of parabolic similaritons

Abstract

Parabolic pulses from a similariton amplifier at 1550 nm are compressed using a two-stage fiber compressor employing linear compression in photonic bandgap fiber and soliton effect compression in highly nonlinear fiber. Precise optimization of the compressor design using frequency resolved optical gating allows the generation of minimally chirped pulses as short as 20 fs. This duration corresponds to only four optical cycles of the underlying electric field at this wavelength.

Optical Parabolic Pulse Generation and Applications

“…Additional nonlinear higher-order soliton compression has enabled the generation of pulses with temporal durations as short as 20 fs (i.e. four optical cycles at 1550 nm) [77]. If the primary goal is not to reach high peak powers, a length of anomalously dispersive fiber can be used [60,62,64,69].…”

Tailoring the Nonlinear Response of Hollow-core Photonic Bandgap Fibres

“…However, the 10 |im 3-cell fibre has a much higher dispersion (180 ps/nm/km) than the 7-cell fibre (20 ps/nm/km). The low dispersion slope of these fibres means that they could be used for re-compression of amplified pulses in all-fibre laser systems [7]. We anticipate that the larger nonlinearity of the 3-cell fibre will allow for the propagation of lower-energy solitons than previously [8], notwithstanding the higher dispersion.…”

“…Their low nonlinearity combined with their dispersion properties make them ideal for the delivery and manipulation of ultrashort pulses [7][8][9]. These emerging applications will benefit from the development of fibres with tailored nonlinear response and dispersion properties.…”

Self-similar amplification in fiber Bragg gratings written in fiber amplifiers

“…Therefore, it does not require pulse prestretching to reduce nonlinearity [5]. Because of the chirp that is added during the amplification, it is possible to compress the amplified pulse to a pulse duration much shorter than the initial pulse duration [6].…”