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在忽略高能级的自发辐射和光纤损耗的情况下,利用速率方程和传输方程理论研究了高浓度Er3+/Yb3+共掺磷酸盐玻璃光纤放大器的增益特性,讨论了Er3+浓度、Yb3+浓度、抽运光功率、信号光功率、光纤长度对放大器增益的影响,并与单掺铒光纤放大器进行了比较.由于Yb3+的敏化作用降低了铒离子的团簇效应,减少了离子间相互作用,共掺光纤的增益和效率明显高于单掺光纤.数值计算表明,3.2cm长Er3+/Yb3+共掺光纤在980nm的20dBm(100mW)抽运功率下,1532nm处的增益可达10dB.
The gain characteristics of high concentration Er3 + / Yb3 + co-doped phosphate glass fiber amplifiers are studied by using the rate equation and transmission equation theory under the condition of ignoring the spontaneous emission and fiber loss of high energy level. The effects of Er3 + concentration, Yb3 + concentration, The influence of power, signal power and fiber length on amplifier gain is compared with that of single-doped erbium-doped fiber amplifier.As the sensitization of Yb3 + reduces the cluster effect of erbium ion and reduces the inter-ionic interaction, the co-doped fiber The gain and efficiency of the 3.2cm long Er3 + / Yb3 + co-doped fiber at 10dBm (100mW) pumping power at 980nm can reach 10dB gain at 1532nm.