CAJ | 학술논문

半导体光放大器以其良好的非线性在全光网络中具有广泛应用,但较长的载流子恢复时间一直是制约其用于超快全光信号处理的速率瓶颈,基于包含自发辐射噪声的半导体光放大器模型,探讨了提高半导体光放大器增益恢复时间的有效途径,通过对制约透明波长移动,增益饱和与有效载流子寿命的相关因素进行数值分析,得出以下结论:与单辅助光相比,采用双辅助光可以在不牺牲信号增益的前提下进一步缩短载流子寿命,因而是提高半导体光放大器增益恢复时间的有效途径,这一点对工程设计和应用具有一定的指导意义.
반도체광방대기이기량호적비선성재전광망락중구유엄범응용,단교장적재류자회복시간일직시제약기용우초쾌전광신호처리적속솔병경,기우포함자발복사조성적반도체광방대기모형,탐토료제고반도체광방대기증익회복시간적유효도경,통과대제약투명파장이동,증익포화여유효재류자수명적상관인소진행수치분석,득출이하결론:여단보조광상비,채용쌍보조광가이재불희생신호증익적전제하진일보축단재류자수명,인이시제고반도체광방대기증익회복시간적유효도경,저일점대공정설계화응용구유일정적지도의의.
A theory model was presented,which account for the impacts of amplified spontaneous emission and double continuous-wave assist light beams on the carrier dynamics in a semiconductor optical amplifier (SOA),and was used to numerically simulate transparency wavelength shift,gain saturation and effective carrier lifetime variation.Firstly,as a verification of the model,the dependence of transparency wavelength on both probe wavelength and probe power was provided.This numerical result was in agreement with the previous experiment.Secondly,based on this temporal gain dynamics model,the SOA behaviors of gain saturation and effective carrier lifetime under double assist light beams separately near material and device transparency wavelengths were investigated.It is demonstrated that the saturation output power and the gain recovery time can be greatly improved by using double assist light injection without sacrificing the available SOA gain compared with the scheme of single assist light injection.These simulation results suggest that using double assist light beams near transparency wavelength are useful for improving SOA performance in ultrafast photonic networks.