摘要
研究了不归零2DPSK和4DPSK系统的色度色散(CD)和一阶偏振模色散(PMD),综合放大器噪声、脉冲波形和光/电滤波器,以及系统存在的彩色色散和一阶偏振模式色散等因素,建立了DPSK系统模型,仿真计算了线性传输系统的光功率损耗,结果表明,4DPSK系统的色度色散和一阶偏振模色散的功率损耗比2DPSK系统更低。
This paper studies the impact of chromatic dispersion (CD) and first-order polarization-mode dispersion (PMD) on binary differential phase-shift keying (2DPSK) or quaternary DPSK (4DPSk) systems with nonretumto-zero (NRZ) formats. Taking account of amplifier noise, pulse shapes, optical and electrical filtering, CD, and PMD, a mathematical model is firstly established, then the simulation is made with a linear transmission system and optical power loss is evaluated. The results show that 4DPSK exhibits lower CD and PMD power loss than 2DPSK.
出处
《应用科技》
CAS
2005年第11期7-9,共3页
Applied Science and Technology