光学
脉冲压缩
材料科学
光子晶体光纤
底座
色散(光学)
脉搏(音乐)
超短脉冲
自相位调制
光纤
非线性光学
物理
激光器
电信
雷达
考古
探测器
计算机科学
历史
作者
A Esther Lidiya,R. Vasantha Jayakantha Raja,Shailendra K. Varshney
出处
期刊:Journal of Optics
[IOP Publishing]
日期:2021-10-29
卷期号:23 (12): 125503-125503
被引量:2
标识
DOI:10.1088/2040-8986/ac34e8
摘要
Abstract We propose a realistic numerical model based on cascaded self-similar pulse compression to generate low pedestal ultrashort pulses at 2.5 µ m. Self-similarity in photonic crystal fibers (PCFs) has been attained by modelling exponentially dispersion decreasing and exponentially nonlinearity increasing chalcogenide PCFs. The tapered PCF (TPCF) model is theoretically designed using the fully vectorial effective index method (FVEIM) to obtain accurate effective refractive index, group velocity dispersion (GVD), and Kerr nonlinearity values with low computation time. Initially, fundamental soliton compression in As 2 S 3 tapered PCF is being investigated for the pedestal-free reduction of the pulse width. Subsequently, the compression factor is further enhanced in the As 2 Se 3 PCF-based nonlinear optical loop mirror. The numerical outcomes reveal a compression of 1 ps pulse down to a pulse width of 16.6 fs with a peak power of 116 W in a total fiber length of L = 61 cm.
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