Wang Ning, Zacarias J C Alvarado, Antonio-Lopez J Enrique, Eznaveh Z Sanjabi, Gonnet Cedric, Sillard Pierre, Leon-Saval Sergio, Schülzgen Axel, Li Guifang, Amezcua-Correa Rodrigo
Opt Express. 2018 Dec 10;26(25):32777-32787. doi: 10.1364/OE.26.032777.
We propose and experimentally demonstrate an intra-cavity transverse mode-switchable fiber laser based on a mode-selective photonic lantern and a few-mode Er-doped fiber amplifier. The six lowest-order LP modes can lase independently and are switchable by changing the input port of the photonic lantern. We measured the slope efficiency, mode intensity profile, and optical spectrum of each lasing mode. In addition, we demonstrate donut-shaped LP and LP modes using incoherent superposition and simultaneous lasing of the two degenerate modes.
我们提出并通过实验证明了一种基于模式选择光子灯笼和少模掺铒光纤放大器的腔内横向模式可切换光纤激光器。六个最低阶的LP模式可以独立激射，并且可以通过改变光子灯笼的输入端口来切换。我们测量了每个激射模式的斜率效率、模式强度分布和光谱。此外，我们利用两个简并模式的非相干叠加和同时激射展示了甜甜圈形状的LP和LP模式。
