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light due [duty] 燈塔稅。

light echo

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 首先理論分析了當有源環形腔無注入光,且有源光纖環形腔在閾值以下時,由有源腔內ase輸出光表現出的腔輸出特性。