Programmable high-order mode control method based on acoustically induced fiber grating

We demonstrate a programmable high-order mode control method that can be implemented in high-power fiber lasers. 2 W average-power mode-locked pulses are obtained based on a mode-locked fiber laser working in dissipative soliton resonance regime. The fundamental mode (LP01) is fully or partially converted to the high-order modes (LP11a/b), acoustically-induced fiber grating. The mode-superposition fields are recorded using an optical 4f system, and mode components are subsequently analyzed by a mode decomposition algorithm. Our experiments suggest that the mode patterns are stable and dynamically switchable. The method is expected to possess good application value in optical tweezers, fiber communication, laser material processing and other research fields. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

We demonstrate a programmable high-order mode control method that can be implemented in high-power fiber lasers. By working in the regime of dissipative soliton resonance, we achieve 2 W average-power mode-locked pulses using a mode-locked fiber laser. The fundamental mode (LP01) is converted to high-order modes (LP11a/b) using an acoustically-induced fiber grating. The mode superposition fields are recorded and analyzed using an optical 4f system and a mode decomposition algorithm, respectively. Our experiments show stable and dynamically switchable mode patterns. This method is expected to have significant application value in optical tweezers, fiber communication, laser material processing, and other research fields.