light dues meaning in English

灯标费
灯塔费灯标税
灯塔税；灯钞

Just below threshold , consistel1t to theoretical analysis , there are numbers of comb - like narrow linewidth lights due to resonating of ifltr8 - cavity ase light . novel experimental results of the erbium - doped - fiber ring resonator behaviors operating near threshold are reported in the chapter
首先理论分析了当有源环形腔无注入光，且有源光纤环形腔在阈值以下时，由有源腔内ase输出光表现出的腔输出特性。