小芯径光子晶体光纤中基于前向受激布里渊散射的超光速传输特性（英文）
发布时间：2021-08-25 01:32
理论研究了小芯径光子晶体光纤中基于前向受激布里渊散射的快光.利用前向受激布里渊散射三波耦合方程,通过傅里叶变换,计算小芯径光子晶体光纤中的群折射率和增益系数.用有限元法模拟了声场和光场的分布、信号光时间提前量和展宽因子.小芯径光子晶体光纤中光场与声场可以有效地重叠在纤芯中,增强了它们之间的非线性相互作用,导致强的受激布里渊散射和大的时间提前量.随着信号光传输距离的增加,时间提前量成非线性增长,与此同时,信号光被压缩.随着初始脉冲的增大,脉冲展宽因子逐渐趋于平稳.当传输距离为70 m,初始脉冲宽度为200 ns,泵浦功率为600 mW,计算出时间提前量为21.76 ns和脉冲展宽因子为0.77.
【文章来源】：光子学报. 2020,49(07)北大核心EICSCD
【文章页数】：8 页
【文章目录】：
0 Introduction
1 Theory
1.1 The FSBS fast light
1.2 The FSBS acoustic field
2 Numerical simulation
2.1 The proposed small-core PCFs
2.2 The optical and acoustic field distribution
2.3 The gain coefficient,refractive index and group index with the frequency
2.4 Time advancement of the fast light
2.5 Distortion of optical pulses induced by the fast light
2.6 The normalized waveforms of output
3 Conclusion
本文编号：3361116
【文章来源】：光子学报. 2020,49(07)北大核心EICSCD
【文章页数】：8 页
【文章目录】：
0 Introduction
1 Theory
1.1 The FSBS fast light
1.2 The FSBS acoustic field
2 Numerical simulation
2.1 The proposed small-core PCFs
2.2 The optical and acoustic field distribution
2.3 The gain coefficient,refractive index and group index with the frequency
2.4 Time advancement of the fast light
2.5 Distortion of optical pulses induced by the fast light
2.6 The normalized waveforms of output
3 Conclusion
本文编号：3361116
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