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The amplified model of erbium-doped fiber amplifier (EDFA) with cross-phase modulation (XPM) |
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| Authors: | Huang Jing Yao Jianquan Liang Ruisheng |
| Institution: | a School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tian Jin 300072, China b School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510631, China |
| Abstract: | Based on the rate equations and the power propagation equations, the amplified model is obtained which considers the cross-phase modulation (XPM)-induced intensity fluctuation between pump power and signal power in erbium-doped fiber amplifier (EDFA). Simulation results show: a higher nonlinear coefficient and a stronger pump power cause a stronger XPM in EDFA. Before the optimal length of EDF, the intensity caused by XPM increases with the increasing length, but after the optimal length, the XPM presents saturation. A bigger nonlinear coefficient γ corresponds to a smaller optimal length and gain, and makes gain saturation more easy. XPM effect will decrease EDFA’s amplified efficiency. |
| Keywords: | XPM EDFA Small-signal gain |
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