Abstract
An equation is derived for analyzing the self-action of wave packets with few optical cycles in multicore fibers (MCFs). A class of stable out-of-phase spatiotemporal solitons with few-cycle durations in the MCF with cores located in a ring is found and analyzed. The stability boundary of the obtained solutions is determined. As an example of using such solitons, we considered the problem of their self-compression in the process of multisoliton dynamics in the MCF. The formation of laser pulses with a duration of a few optical cycles at the output of a 10-core MCF is shown.
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