国产25/400μm掺镱双包层光纤实现2.2 kW窄线宽单模激光输出

Based on the self-developed uniformly doped ytterbium-doped double-clad fiber with a 25/400 μm diameter and a low thermo-optic coefficient, an all-fiber high-power narrow-linewidth fiber laser amplification experiment was carried out. The laser system achieved a single-mode laser output with a central wavelength of 1060.3 nm, a linewidth of 25 GHz, and a maximum power of 2.2 kW. Its slope efficiency reached 78%, and the beam quality factor M²≈1.2. Its power is the highest single-mode laser output power of a narrow-linewidth amplifier based on a domestic 25/400 μm ytterbium-doped double-clad fiber reported so far.

基于自主研制的均匀掺杂低热光系数25/400μm掺镱双包层光纤,开展了全光纤高功率窄线宽光纤激光放大实验。激光系统实现了中心波长为1060.3 nm、线宽为25GHz、最高功率为2.2 kW的单模激光输出,其斜率效率达78%,光束质量因子M~2≈1.2,其功率是目前报道的基于国产25/400μm掺镱双包层光纤窄线宽放大器单模激光输出的最高功率。