在零散波长附近的色散缓变光纤及其调制不稳定性  

DispersionDecreasing Slowly Optical Fiber Near the Zero Dispersion and Modoulational Instability

作　　者：刘秀敏[1] 杨性愉[1] 王晶[1] 冯启元[1] 李建新[1] 

机构地区：[1]内蒙古大学物理学系,内蒙古师范大学物理学系

出　　处：《内蒙古大学学报（自然科学版）》1998年第1期31-34,共4页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家自然科学基金

摘　　要：利用准非线性薛定谔方程，得出在零色散波长处光脉冲在色散缓变光纤里无畸变传输所满足的色散和损耗的关系．分析了色散缓变光纤调制不稳定性，由于四阶色散的存在，在二阶色散等于零时，仍然存在调制不稳定性． The relation between the dispersion and the loss for optical pulse propagating without distortion near the zero dispersion point in the fiber with slowly decreasing dispersion is obtained by means of an extended nonlinear Schrodinger equatiton.Modulational instability in the fiber with slowly decreasing dispersion is analyzed.Because of the fourthorder dispersion,modulational instability is still existed when secondorder dispersion equals to zero.The gain spectrum of the fiber with slowly decreasing dispersion is compared with that of the ideal optical fiber.

关 键 词：零色散 色散缓变光纤 四阶色散 调制不稳定性 

分 类 号：O437[机械工程—光学工程] TN253[理学—光学]