CAJ | 학술논문

文中提出了一种基于半导体光放大器(SOA)中交叉增益调制(XGM)效应的超宽带(UWB)脉冲振幅调制(PAM)方案。并利用Optisystem7.0软件对其进行仿真。首先研究了超宽带PAM信号对光源功率、调制速率、光源波长的敏感度，结果表明该方案可以通过设置合适的光源功率和调制速率产生较好的PAM信号，并且对光源波长变化不敏感；另外分析了在光纤中PAM信号的传输特性，结果表明PAM格式的调制信号受色散和衰减影响较大，传输距离较短。
문중제출료일충기우반도체광방대기(SOA)중교차증익조제(XGM)효응적초관대(UWB)맥충진폭조제(PAM)방안。병이용Optisystem7.0연건대기진행방진。수선연구료초관대PAM신호대광원공솔、조제속솔、광원파장적민감도，결과표명해방안가이통과설치합괄적광원공솔화조제속솔산생교호적PAM신호，병차대광원파장변화불민감；령외분석료재광섬중PAM신호적전수특성，결과표명PAM격식적조제신호수색산화쇠감영향교대，전수거리교단。
In this paper,an improved UWB Pulse Amplitude Modulation ( PAM) scheme based on cross-gain modulation ( XGM) in SOA is presented,and use the software of Optisystem7. 0 to simulate. The influence of source power,modulation rate and source wave-length on the PAM signal is firstly investigated,and the results show that by appropriately setting light source power and modulation rate, the scheme can generate better PAM signal and is not sensitive to light wavelength change. In addition,the transmission characteristics of PAM signal in the optical fiber are analyzed,and the results show that modulation signal in PAM formats is greatly influenced by the dis-persion and attenuation,and the transmission distance is short.