High-power dual-wavelength Ho-doped fiber laser at 2?μm tandem pumped by a 1.15?μm fiber laser

摘要

We demonstrated a high-power continuous-wave (CW) dual-wavelength Ho-doped fiber laser (HDFL) at 2049?nm and 2153?nm with a simple coupled-cavity configuration. A ~100?W laser diode-pumped fiber laser at 1150?nm served as the pump source. The maximum output power reached ~22.3?W and the slope efficiency was 23%. By altering the incident pump power, the power ratio of two signal wavelengths could be tuned in a large range due to gain competition. As far as we know, this is the first CW dual-wavelength HDFL with the power exceeding ten-watt-level, and the first dual-wavelength HDFL with the central wavelengths exceeding 2.0?μm and 2.15?μm respectively.