论文部分内容阅读
分析了高速ＩＭ／ＤＤ光纤通信系统的传输特性，对光通道色散影响和光源相位噪声影响进行了分析，结果表明当光源相位噪声较大时，系统的误码率－平均接收光功率曲线将出现“饱和”现象。对高速光发射机、光接收机技术等进行了深入的研究，通过选择激光器最佳工作状态，设计并完成了２．５Ｇｂ／ｓ光发射与光接收模块，并对２．５Ｇｂ／ｓ光纤传输实验系统的测试结果进行了分析。实现了１０９ｋｍ常规单模光纤的无中继传输，工作波长为１５５０ｎｍ，采用内强度调制／直接检测（ＩＭ／ＤＤ）方式，误码率为１－１０时接收机灵敏度为－３１．５ｄＢ（以１ｍＷ为零电平）。利用ＥＤＦＡ克服光纤的损耗后，无再生中继传输距离达到１８０ｋｍ。
The transmission characteristics of the high speed IM / DD optical fiber communication system are analyzed. The influence of the dispersion of the optical channel and the phase noise of the light source are analyzed. The results show that when the phase noise of the light source is large, the BER of the system - average received light power curve will appear “Saturated” phenomenon. The high-speed optical transmitter and receiver technology are studied deeply. By choosing the best working condition of the laser, a 2.5Gb / s optical transmitter and receiver module is designed and completed. The 2.5Gb / s optical fiber transmission The experimental system test results were analyzed. The 109km conventional single-mode optical fiber is transmitted without relays. The operating wavelength is 1550nm. The IM / DD mode is adopted. When the bit error rate is 1-10, the receiver sensitivity is -31.5dB 1mW is zero level). After using EDFA to overcome the loss of optical fiber, no regenerative relay transmission distance up to 180km.