Abstract
Group-velocity matched cross-phase modulation between a fundamental soliton and a dispersive wave packet has been previously suggested for optical switching applications similar to an optical transistor. Moreover, the nonlinear interaction in the resulting group-velocity horizon can be exploited for adiabatic compression of the soliton down into the few-cycle regime. Here, we study the delicate phase- and frequency-matching mechanism of soliton/dispersive wave interaction by controlling the input chirp of the dispersive wave. We demonstrate that such a modification of the dispersive wave can significantly alter the soliton dynamics. In particular, we show that it allows a decrease of the fiber length needed for the best compression and, to some extent, control of the trajectory of the soliton. The mechanism of such an influence is related to the modification of the phase-matching condition between the soliton and dispersive wave.
Highlights
The study and generation of light pulses that encompass only a few cycles of the electric field is a major topic in ultrafast optics, and nowadays, ultrashort pulses can be generated in a wide spectral range
We study the delicate phase- and frequencymatching mechanism of soliton/dispersive wave interaction by controlling the input chirp of the dispersive wave. We demonstrate that such a modification of the dispersive wave can significantly alter the soliton dynamics
We have studied the dynamics of a short soliton resonantly interacting with a chirped dispersive wave packet in an endlessly single-mode (ESM) photonic crystal fiber
Summary
The study and generation of light pulses that encompass only a few cycles of the electric field is a major topic in ultrafast optics, and nowadays, ultrashort pulses can be generated in a wide spectral range. The collision may alternatively be understood as scattering or reflection of the dispersive radiation at the refractive index barrier created by the soliton [3]–[5] These kinds of XPM interactions are known as the optical push broom effect [6], and there is a noteworthy analogy to the so-called optical event horizon, see [7], [8]. The compression scheme, as suggested in [23] and released in [24], has its practical limitations Given both a certain fiber GVD profile and a certain soliton to compress, one has to employ a group velocity matched second pulse. Note that use of longer dispersive pulses seems to be impractical, because the compressed soliton quickly changes its carrier frequency destroying the velocity matching condition. We show that both effects play a noticeable role and may be used as a mean to control the trajectory of the soliton, as well as compression dynamics
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