光孤子在高斯变迹光栅中传输特性的数值分析  

Numerical analysis of transmission characteristic of optical solitons in Gaussian-apodized fiber Bragg gratings

作　　者：迎春[1,2] 贾维国[1] 敖特根[3] 周彦勇[1] 包红梅[1] 

机构地区：[1]内蒙古大学物理系 [2]内蒙古工业大学物理系 [3]内蒙古化工职业学院呼和浩特010010

出　　处：《激光技术》2009年第2期209-212,共4页Laser Technology

基　　金：国家自然科学基金资助项目(60468001)

摘　　要：为了研究光纤光栅中布喇格孤子的传输特性,基于耦合波理论采用有限差分法在孤子传播速度与传输距离无关的条件下,数值模拟了布喇格孤子在高斯变迹光纤光栅中的传输以及孤子之间的相互作用,得到一些有意义的结果。结果表明,输入功率和初始脉宽等初始条件的不同将导致孤子峰值强度的周期变化;具有初始频率啁啾时布喇格孤子在传输过程中被展宽(正啁啾)或被窄化(负啁啾),并始终受到高斯变迹光栅的制约。当输入两个孤子时,它们之间的相互作用对其相对相位和相对振幅参量敏感。Based on the framework of the coupled modes theory, transmission of the Bragg solitons and interaction of the Bragg solitons were simulated with the finite-difference scheme in Gaussian-apodized fiber Bragg gratings under the condition with the transmission speed irrelevant to the transmission distance. According to the numerical results, the peak power of Bragg solitons changes with different incident peak power and pulse width. And interaction of two solitons relies on their relative phase and amplitude. When the initial pulse is chirped, transmission of Bragg solitons is broadened （ positive chirp） or narrowed （ negative chirp） and restricted by Gaussian-apodized gratings all the time.

关 键 词：光纤光学 布喇格孤子 有限差分法 光纤光栅 反常色散区 

分 类 号：TN253[电子电信—物理电子学]