FSR优化后的DPSK解调的研究  

Study on FSR optimized DPSK demodulation

作　　者：曹云[1] 杨壮[1] 陈德华[1] 叶荣富[1] 

机构地区：[1]光纤通信技术和网络国家重点实验室烽火通信科技股份有限公司,湖北武汉430074

出　　处：《光通信研究》2009年第3期18-19,34,共3页Study on Optical Communications

摘　　要：文章仿真验证了在差分相移键控(DPSK)解调时,通过调整延时线干涉仪(DLI)两臂的相对延迟来优化自由光谱范围(FSR),使其大于传输比特率,能够获得比传统1 bit延迟更好的传输性能,并得到了FSR的最优值。优化FSR后的DPSK解调系统对光信噪比(OSNR)灵敏度和色度色散容限范围均有改善,对偏振模色散(PMD)的容忍度没有明显提高。In this paper, simulations verify that when DPSK demodulation is conducted, better transmission performances can be achieved and the optimal FSR value obtained by adjusting the relative delay of the two arms of the Delay Line Interferometer （DLI） for optimizing the Free Spectrum Range （FSR） so as to make it greater than the transmission bit rate, than those by the conventional 1 bit delay. Besides, the DPSK system after FSR optimization is improved in both OSNR sensitivity and dispersion tolerance. However, its suppression effect on PMD is not obviously enhanced.

关 键 词：差分相移键控 延时线干涉仪 自由光谱范围 光信噪比 

分 类 号：TN915[电子电信—通信与信息系统]