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1.7 W holmium-doped fluoroindate fiber laser at 3920 nm
Optics Letters- received 02/23/2024; accepted 04/09/2024; posted 04/10/2024; Doc. ID 522233
- Abstract: A monolithic fiber laser emitting 1.7 W at 3920 nm is experimentally demonstrated in a Ho3+:InF3 fiber. The cavity comprises a pair of highly reflective fiber Bragg gratings written in the active fiber with the femtosecond phase-mask scanning technique, and is spliced to the pump diode with a robust silica-to-fluoride fiber splice. This work is an important step towards high-power all-fiber laser operating in the vicinity of 4 μm.