CAJ | 학술논문

根据皮秒光脉冲在光纤中传输时所满足的非线性薛定谔方程,利用数值模拟方法,研究了利用准连续波作为初始输入脉冲、利用单模光纤中的调制不稳定性和光子晶体光纤的高非线性效应产生超连续激光光谱(SC)的新方法,探讨了SC的形成机理,研究了不同条件下SC的形成过程,研究结果表明:准连续波光脉冲峰值功率越高、初始脉宽越宽,越有利于SC的产生;超连续谱向长波长方向的展宽要受到光子晶体光纤长度的影响,要想获得平坦的宽带SC,必须采用合适的光子晶体光纤长度.
근거피초광맥충재광섬중전수시소만족적비선성설정악방정,이용수치모의방법,연구료이용준련속파작위초시수입맥충、이용단모광섬중적조제불은정성화광자정체광섬적고비선성효응산생초련속격광광보(SC)적신방법,탐토료SC적형성궤리,연구료불동조건하SC적형성과정,연구결과표명:준련속파광맥충봉치공솔월고、초시맥관월관,월유리우SC적산생;초련속보향장파장방향적전관요수도광자정체광섬장도적영향,요상획득평탄적관대SC,필수채용합괄적광자정체광섬장도.
From the nonlinear Schrodinger equation that governs propagation of picosecond optical pulses in fibers, by using simulation method, quasi-continuous-wave supercontinuum generation by using the modulation instability of single mode fibers and the high nonlinearity of the photonic crystal fiber are investigated.The forming mechanism of supercontinuum generation by using quasi-continuous-wave as the incident source was also studied. It is shown that the higher pump power and wider pulse width generate wider supercontinuum. In addition, the widening at the longer wavelengths of the supercontinuum is limited by the length of the supercontinuum, that is to say, in order to obtain a smoother and broader supercontinuum, one must use an optimal fiber length.