掺铒环形光纤激光器中暗孤子族的演化  

Evolution of dark soliton trains in erbium-doped fiber ring laser

作　　者：杨玲珍[1] 岳宝花 

机构地区：[1]太原理工大学物理与光电工程学院,光电工程研究所,太原030024

出　　处：《深圳大学学报（理工版）》2013年第6期598-602,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(61107033);山西省高等学校优秀青年学术带头人支持计划资助项目(2012lfjyt05)~~

摘　　要：基于非线性耦合薛定谔方程和非线性偏转锁模技术,理论研究掺铒光纤环形激光器产生暗孤子族的演化规律.结果表明,当小信号增益保持不变,环形光纤激光器的锁模透过率函数影响构成暗孤子族中暗孤子数目,暗孤子族中暗孤子的数目与暗孤子受到扰动时色散波的不同强度与损耗分布不同有关.由自相位调制和互相位调制产生的非线性相移导致的相同频率不同相位的光波发生相长和相消干涉,这种干涉的结果导致暗孤子族光谱旁瓣的产生.Based on the coupled complex nonlinear Schr^dinger equations, the evolvement of dark soliton trains is numerically investigated in erbium-doped fiber ring mode-locked laser by means of the nonlinear polarization rotation technique. The results show that the transmittance function of the mode-locked fiber ring laser can affect the number of dark solitons when the small signal gain is fixed. The number of dark soliton trains is related to different loss dis- tribution of the different intensity of dispersive waves generate in the disturbed dark soliton. The self-phase modula- tion and the cross-phase modulation generate the nonlinear phase. The nonlinear phase can cause the interference of the relative phase. The interference of the relative phase of the wave with the same frequency the different phase leads to the generation of the optical spectrum sideband.

关 键 词：光纤激光器 暗孤子 非线性偏转 铒光纤 锁模 自相位调制 互相位调制 非线性薛定谔方程 

分 类 号：TN248[电子电信—物理电子学]