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掺铒光纤放大器(EDFA)可以采用可靠、低成本的800nm波长AlGaAs激光二极管激励.我们就如何解决受激态吸收(ESA)问题的有关方法,进行了综合性实验和理论分析.受激态吸收是该波长泵浦效率的主要障碍,采用双向泵浦或基态吸收(GSA)能带的长波长端泵浦的方法,以附加噪声的增加为代价,可以减小ESA对增益的影响.GSA和ESA的横截面谱取决于玻璃基质材料.我们对不同掺铒量的玻璃测量了GSA/ESA比值.在基于定量数值模型的详细分析中,对氟磷酸盐(最合适的基质材料之一)和Al/P石英作了比较,可以预料,获得同样性能的氟磷酸盐EDFA所需的泵浦功率约小2～3dB.就采用Al/P石英EDFA情况而言,对激励800nm与980nm和1480nm能带的泵浦功率要求作了比较,结果表明,800nm能带所需的泵浦功率约大7dB.
The erbium-doped fiber amplifier (EDFA) can be excited by a reliable, low-cost AlGaAs laser diode with a wavelength of 800 nm. We conducted comprehensive experiments and theoretical analyzes on how to solve the problem of excited-state absorption (ESA) Is a major obstacle to pump efficiency at this wavelength and the effect of ESA on gain can be reduced at the expense of additional noise using a long wave end pump of a bi-directional pump or ground state absorption (GSA) band. The GSA and The cross-sectional profile of the ESA is dependent on the glass matrix material. We measured GSA / ESA ratios for different erbium-doped glasses. In a detailed analysis based on a quantitative numerical model, fluorophosphate (one of the most suitable matrix materials) and Al / P quartz, it is expected that the pump power required to achieve the same performance for the fluorophosphate EDFA is approximately 2 to 3 dB.Because of the Al / P quartz EDFA case, for the excitation of 800 nm and 980 nm and 1480 nm energy Band pump power requirements were compared, the results show that the pump power required for 800nm band about 7dB.