High-efficiency tunable femtosecond solitons generation from 1.9 to 2.35 µm in a thulium-doped fiber amplifier via precise seed-pulse management.

We demonstrate the tunable Raman femtosecond solitons generation with a record-breaking power of 1.2 W at 2.3 µm and an ever-reported highest Raman soliton energy conversion efficiency of 99% via precise seed-pulse management in the thulium-doped single-mode fiber amplifier.