對不同光纖色散系數、任意光纖條數、任意長度組成的多級聯光傳輸系統，推導了由自相位調制引起的光功率傳遞函數，并對此進行了仿真計算。結果表明，自相位調制引起的功率變化與系統的光纖損耗、色散系數、非線性系數、調制頻率等參數有關，并且隨調制頻率增加成波動性變化，從而證明了理論分析的正確性。
關 鍵 詞 自相位調制; 多級聯光纖傳輸系統; 色散; 光纖通信系統

Abstract The self-phase modulation induced optical power transfer function is analyzed in cascaded optical fiber communication system in terms of different chromatic dispersion, arbitrary fiber numbers and lengths. Computer simulations are also done. The results of simulations show that the power change of self-phase modulation (SPM) relates to fiber loss, nonlinear coefficient and modulation frequency of system and fluctuates with change of modulation frequency. The simulations are well accordance with the analytical result.
Key words self-phase modulation; cascaded optical transmission system; chromatic dispersion; optical communication system