论文部分内容阅读
根据一阶光学微分器的传递函数,理论分析了均匀长周期光纤光栅(LPFG)作为一阶瞬态光学微分器应满足的条件。周期压力产生的LPFG能够通过压力的控制加强光栅的模式耦合,因而得到大的光栅谐振损耗,实验证明了周期压力在细径光纤上产生的LPFG能够产生大于50dB的谐振损耗。数值模拟结果表明,此光栅光学微分器能够高精度地完成对高斯脉冲的微分运算,在超快全光信号处理、飞秒脉冲整形和任意光脉冲产生等领域中有宽广的应用前景。
According to the transfer function of the first order optical differentiator, the condition of uniform long period fiber grating (LPFG) as a first order transient optical differentiator should be theoretically analyzed. The LPFG generated by the periodic pressure can enhance the mode coupling of the grating through the control of the pressure, thereby obtaining a large grating resonant loss. The experiment proves that the LPFG produced by the periodic pressure on the narrow-diameter fiber can generate the resonance loss greater than 50 dB. The numerical simulation results show that the grating optical differentiator can finish the differential operation of Gaussian pulse with high precision and has wide application prospect in the field of ultrafast all-optical signal processing, femtosecond pulse shaping and arbitrary light pulse generation.