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Updated: May 29, 2026
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
High-power diode-pumped fiber laser operating at 3 μm
Jianfeng Li1, Darren D Hudson, Stuart D Jackson
1Institute of Photonics and Optical Science and the Centre for Ultrahigh Bandwidth Devices for Optical Systems, School of Physics, University of Sydney, Camperdown, Australia.
Abstract:
A high-power diode-cladding-pumped Ho³⁺-doped fluoride glass fiber laser operating in cascade mode is demonstrated. The ⁵I₆→⁵I₇ and ⁵I₇→⁵I₈ laser transitions produced 0.77 W at a measured slope efficiency of 12.4% and 0.24 W at a measured slope efficiency of 5.2%, respectively. Using a long fiber length, which forced a large threshold for the ⁵I₇→⁵I₈ transition, a wavelength of 3.002 μm was measured at maximum output power, making this system the first watt-level fiber laser operating in the mid-IR.
