掺铒光纤中亚稳态粒子振荡和慢光时间延迟关系研究

Study on the relationship between the population of metastable state and time delay in an erbium-doped optical fiber

由于光纤慢光在实际中的应用价值引起广泛关注.技术手段上利用相干布居振荡效应实现光速可控更具有优势.本文主要介绍了利用相干布居振荡效应(CPO)实现掺铒光纤中的光速减慢传输,通过改变掺杂浓度、光纤长度、入射信号光及抽运光功率等参量,具体研究了亚稳态粒子振荡和时间延迟的关系.研究结果表明:选择高浓度光纤、增加光纤长度、关闭抽运光源,选择适当强度的信号光可以有效地增大时间延迟.

The slow light propagation in optical fiber has attracted much attention because of its practical applications. Use of coherent population oscillation to produce slow light propagation has many advantages over other methods. We investigate the reduction of the group velocity propagation by the coherent population oscillation in erbium-doped optical fiber, and also the relationship between the population of metastable state and the time delay by changing the doping concentration, the length of the fiber, the input power, and the pump power. The results show that we can select a high doping concentration of erbium in the fiber, increase the length of the fiber, decrease the pump power and select the appropriate power of the signal light to increases the time delay.