CAJ | 학술논문

基于广义非线性薛定谔方程,通过数值计算对高非线性光纤正常色散区产生超连续谱进行了研究.结果表明,抽运脉冲的峰值功率、脉冲宽度以及脉冲初始啁啾对该光纤正常色散区超连续谱的形成有极其重要的影响;在高非线性光纤正常色散区产生超连续谱的过程中,三、四阶群速度色散甚至更高阶群速度色散对超连续谱的影响完全可以忽略,但与其他高非线性效应相比,自陡峭效应对超连续谱产生的影响更为明显.高功率超短光脉冲在高非线性光纤正常色散区,得到了没有泵浦成份残余、-20 dB谱宽达400 nm以上而频谱强度起伏小于10 dB的超宽而平坦超连续谱.
기우엄의비선성설정악방정,통과수치계산대고비선성광섬정상색산구산생초련속보진행료연구.결과표명,추운맥충적봉치공솔、맥충관도이급맥충초시조추대해광섬정상색산구초련속보적형성유겁기중요적영향;재고비선성광섬정상색산구산생초련속보적과정중,삼、사계군속도색산심지경고계군속도색산대초련속보적영향완전가이홀략,단여기타고비선성효응상비,자두초효응대초련속보산생적영향경위명현.고공솔초단광맥충재고비선성광섬정상색산구,득도료몰유빙포성빈잔여、-20 dB보관체400 nm이상이빈보강도기복소우10 dB적초관이평탄초련속보.
Based on the generalized nonlinear Schrdinger equation desiring pulse propagation in fiber,the supercontinuum generation in high nonlinear fiber pumped at the normal dispersion region was investigated.The results show that the pulse width,peak power and initial chirp of the pump pulse are very important to flat wideband supercontinuum generation. The supercontinuum generated in high nonlinear fiber with the normal dispersion,the effect of the third,fourth order dispersion even the higher-order dispersion on supercontinuum spectrum can be ignored,the self-steepening was effect on supercontinuum spectrum generation than other higher-order nonlinear effects. A broadband and flat supercontinuum is 400 nm at-20 dB,the spectral intensity fluctuation is 10 dB and without residual pump generated from high nonlinear fiber pumped at the normal dispersion region.