中文摘要：

为实现高速光纤通信系统中的偏振模色散（PMD）补偿,提出了基于高双折射线性啁啾光纤光栅（Hi-BiLCFBG）的线性应变梯度悬臂梁作为PMD补偿器,同时考虑到波分复用（WDM）系统中不同信道PMD值不同,提出了取样啁啾（CSP）与周期啁啾（CGP）的等效,利用带有CSP的高双折射取样光纤光栅（Hi-Bi SFBG）制成多信道PMD补偿器,不同信道等效的啁啾系数不同,从而可同时实现多个信道的PMD补偿。实验中,实现了40Gb/s的传输系统中最大58.6 ps的差分群时延（DGD）补偿,补偿后,信号眼图张开度有明显改善,从而证明了该PMD补偿器的有效性与可行性。

英文摘要：

To achieve the polarization mode dispersion（PMD） compensation in high-rate optical fiber communication systems,a structure of linearly strain gradient cantilever based on high-birefringence linearly chirped fiber Bragg grating（Hi-Bi LCFBG） is proposed as the PMD compensator.Considering that there are different PMD values in different channels in wavelength division multiplexing（WDM） system,it is proposed that the chirp in sample period（CSP） is equivalent to the chirp in grating period（CGP）.Using the Hi-Bi SFBG with CSP,the PMD compensator is fabricated to compensate various PMD values in different channels simultaneously.In PMD compensation experiment,58.6 ps maximum differential group delay（DGD） compensation is achieved,and after compensation,the opening of signal eye diagram is improved obviously,which demonstrates the effectiveness and feasibility of the PMD compensator.