CAJ | 학술논문

从光脉冲在光纤中传输演变所满足的基本方程出发，深入研究了超高斯光脉冲在普通单模光纤中的传输特性，理论分析了影响最窄脉冲宽度位置的不同因素，仿真得到了最窄脉冲宽度位置与初始脉冲宽度、二阶群速度色散系数所符合的近似分布函数。仿真结果表明，无初始啁啾超高斯脉冲入射单模光纤后脉冲波形将不再保持单峰结构，而是经历一个从近平顶到多峰再到单峰的演变过程；脉冲宽度在色散的作用下将经历一个先窄化后变宽的过程。最窄脉冲宽度位置的研究对于实际光通信和光传感中色散补偿位置的确定具有一定的指导意义。
종광맥충재광섬중전수연변소만족적기본방정출발，심입연구료초고사광맥충재보통단모광섬중적전수특성，이론분석료영향최착맥충관도위치적불동인소，방진득도료최착맥충관도위치여초시맥충관도、이계군속도색산계수소부합적근사분포함수。방진결과표명，무초시조추초고사맥충입사단모광섬후맥충파형장불재보지단봉결구，이시경력일개종근평정도다봉재도단봉적연변과정；맥충관도재색산적작용하장경력일개선착화후변관적과정。최착맥충관도위치적연구대우실제광통신화광전감중색산보상위치적학정구유일정적지도의의。
On the basis of the basic equations describing the propagation variation of optical pulses in optical fibers,this paper first investigates in depth the characteristics of super-Gaussian pulses propagating in conventional single-mode fibers.Then it theoretically analyzes the different factors affecting the position of the narrowest pulse width in the fibers and obtains by simu-lation the approximate distribution functions of the position of the narrowest pulse width,the initial pulse width,and second-order group velocity dispersion coefficient.The results indicate that the pulse shape of the incident super-Gaussian pulses with-out initial chirps into the fiber will no longer remain a single-peak structure,but undergoes a variation from near-rectangular, multi-peak,and finally to single-peak and that the pulse width influenced by chromatic dispersion will go through a process of first narrowing and then broadening.The research on the position of the narrowest pulse width in a fiber is instructive to deter-mining the dispersion compensation position in practical optical communication and optical sensing.