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设计了一种新颖的、低开关功率的全光开关.将高非线性光子晶体光纤和双向抽运掺饵光纤放大器引入agnac环形镜内,破坏了环形镜的对称性,利用交叉相位调制作用使反向传输的两路信号光产生非线性相移,从而实现开关效应.理论分析表明:开关功率与放大器的增益倍数和光子晶体光纤非线性系数的积成反比,在实验中所得开关功率约40mW,消光比约为15.9dB,并且信号光透过率随脉冲控制光峰值功率呈余弦变化,实验结果与理论分析相吻合.
A novel all-optical switch with low switching power is designed.The high-nonlinear photonic crystal fiber and the bidirectional fiber-lugged fiber amplifier are introduced into the agnac ring lens, which destroys the symmetry of the ring lens and makes use of the cross-phase modulation The reverse transmission of the two signal light to produce nonlinear phase shift in order to achieve the switching effect.The theoretical analysis shows that: the switching power and amplifier gain multiples and photonic crystal fiber nonlinear coefficient of the product is inversely proportional to the switching power obtained in the experiment about 40mW , The extinction ratio is about 15.9dB, and the signal light transmittance changes with cosine of pulse-controlled peak power. The experimental results are in good agreement with the theoretical analysis.