基于高非线性微结构光纤环镜的脉冲压缩与基座抑制

提出了利用一种高非线性微结构光纤构成非线性光纤环镜（NOLM）进行脉冲压缩和基座抑制的方案.所提出的微结构光纤具有高非线性系数和大反常色散.理论研究了基于这种微结构光纤的NOLM对脉冲的压缩效应，并分析了压缩的机制.数值结果表明，这种NOLM采用较短的光纤长度就能有效地压缩脉冲并明显抑制了基座.对于给定的输入脉冲，存在一个最优的环路长度，可以获得高质量的压缩脉冲.通过适当选择耦合比和环路长度，则可以完全消除脉冲的基座.

Nonlinear Optical Loop Mirror Based on Highly Nonlinear Microstructured Fiber for Pulse Compression with Pedestal Suppression

A highly nonlinear microstructured fiber is proposed to construct nonlinear optical loop mirrors(NOLMs) for pulse compression and pedestal suppression.The proposed fiber has high nonlinear coefficient and large anomalous dispersion.The compressions of pulses by the NOLMs are theoretically investigated and the compression mechanism is also discussed.It is shown from numerical results that the proposed NOLMs compress the pulses efficiently and significantly suppress the pedestals with a short loop length.For a given input pulse,there exists an optimal loop length at which the high quality compressed pulse can be obtained.By appropriately choosing the power-coupling ratio and loop length,the pedestal can be removed entirely.