【作者】 张小燕； 李齐良； 夏清清；

【Author】 Zhang Xiaoyan Li Qiliang Xia Qingqing (Institute of Communication and Information System,College of Communications,Hangzhou Dianzi University,Hangzhou,310018,China)

【机构】 杭州电子科技大学通信工程学院通信与信息系统研究所；

【摘要】 在保偏非线性双折射光纤的末端加上检偏器能实现对脉冲进行整形。论文从非线性薛定谔耦合方程出发,考虑了非线性双折射光纤两个模式的耦合,利用分步傅立叶方法得到了脉冲的动力学方程。研究结果表明:光脉冲的透射率与瞬时脉冲强度、脉冲初始功率及检偏器与双折射光纤的快慢轴夹角即偏振角有关,检偏器检偏方向越靠近快轴透射光脉冲透射率越大;研究还表明只有选择适当的初始能量,才能得到较好的整形效果。这样,只要检偏器的检偏方向靠近非线性双折射光纤的快轴,同时选择适当初始脉冲能量,才能使脉冲中心部分的透射率大于两翼透射率,使得边缘部分得到衰减,从而使脉冲得到整形。更多还原

【Abstract】 We present the analytical study of using polarizer at the end of nonlinear birefringent fiber to achieve the signal pulse reshape.In this paper,stemming from the coupled nonlinear Schr dinger equation,we use the splitting-step Fourier transform(SSFT) to study the factors which influence the signal pulse’s transmission.The results from the technique indicate that the transmission of pulse relies on the instantaneous intensity,and the initial power of pulse as well as the angle between the fiber’s principle axe and the polarizer.It has been noticed that,choosing a proper the initial energy of signal pulse and the angle between the polarizer as well as the fiber’s principle axe,one can lead to the higher transmission of the pulse in the central part than in the tails of pulse for realization of all-optical pulse compressing and pulse reshaping.更多还原