通过系统分析光纤光栅的耦合模理论,探索、优化光纤光栅的制作过程,研制了满足ITU-T建议波长的优质光纤光栅。用双透镜和扫描移动平台结合相位掩膜板研制的光纤光栅分别成功实现了4×10 Gb/s-400 km和4×10 Gb/s-800 km普通单模光纤传输系统的色散补偿,功率代价均小于2 dB,且最佳功率代价为负值。同时对4×10 Gb/s-800 km普通单模光纤传输系统的偏振模色散实施长时间的监测,系统偏振模色散小于10 ps,提出了发展10 Gb/s的光通信系统更符合目前我国国情的见解。

The coupled mode theory of fiber Bragg grating (FBG) is analyzed. The fabrication course of FBG is explored and optimized, and the good quality FBGs with the wavelengths that fit the ITU-T criterion are made. The 4×10 Gb/s-400 km and 4×10 Gb/s-800 km transmission systems on G.652 fiber with dispersion compensation by FBGs are implemented. The FBGs are made by double lens and scanning stage with phase mask, respectively. The power penalty is less than 2 dB in each channel, and the best power penalty is negative. And the polarization mode dispersion (PMD) of 4×10 Gb/s-800 km transmission system is monitored for a long time. The result shows that in 10 Gb/s system, the PMD compensation is not needed. Developing the 10 Gb/s transmission system fits the situation of China.