Selective Excitation and Amplification of Peak-Power-Scalable Out-of-Phase Supermode in Yb-Doped Multicore Fiber

• DOI: 10.1109/jlt.2020.2966025
• Publication Date: 2020-01-14T22:52:14Z
• Authors: Alexey V. Andrianov; Nikolay A. Kalinin; Elena A. Anashkina; Olga N. Egorova; Denis S. Lipatov; Arkady V. Kim; Sergei L. Semjonov; Alexander G. Litvak
• Keywords: Picosecond; Multi-core processor

We demonstrate selective excitation and coherent amplification in the multicore fiber of out-of-phase supermode that has equal intensities but interleaved 0/π phases neighboring cores. The is beneficial due to its stability at arbitrary high powers, whereas fundamental becomes unstable relatively powers. fabricated a double-clad all solid silica with six highly Yb-doped coupled cores arranged ring structure. obtained 50 picosecond chirped pulses up ~1 μJ energy measured content mode >80%. experimental results were supported by 3D numerical simulation demonstrating possibility fibers real parameters without degradation composition for powers damage threshold glass.