Generation of 12.8-fs Pulses With 1.3-MW Peak Power at 1550 nm in Conventional Single-Mode Fiber

We present a simple and efficient method for generating high-peak-power few-cycle pulses directly in conventional single-mode fibers (SMFs) by synergistically combining soliton self-compression with optimal pre-chirping of the input pulse. 255 fs pulses at 1550 nm is compressed to 12.8 fs over only 17 cm-long SMF without any additional phase compensation. The compressed pulses reach energies up to 16.7 nJ and peak power of 1.3 MW. To our knowledge, this is the highest pulse energy achieved for two-cycle pulses at 1550 nm from conventional SMF. Numerical simulations confirm the experimental results and elucidate the synergistic coupling between pre-chirp management and soliton dynamics. This work provides a robust and practical route to few-cycle pulse generation directly from standard optical fibers.