Deng Zhixiang, Chen Yu, Liu Jun, Zhao Chujun, Fan Dianyuan
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, IFSA Collaborative Innovation Center, School of Physics and Electronics, Hunan University, Changsha 410082, China.
Chaos. 2021 Jan;31(1):013109. doi: 10.1063/5.0028713.
The spectral analysis of the light propagating in normally dispersive graded-index multimode fibers is performed under initial noisy conditions. Based on the obtained spectra with multiple simulations in the presence of noise, we investigate the correlation in energy between the well-separated spectral sidebands through both the scattergrams and the frequency-dependent energy correlation map and find that conjugate couples are highly correlated while cross-combinations exhibit a very poor degree of correlation. These results reveal that the geometric parametric instability processes associated with each sideband pair occur independently from each other, which can provide significant insights into the fundamental dynamical effect of the geometric parametric instability and facilitate the future implementation of high-efficiency photon pair sources with reduced Raman decorrelations.
在初始噪声条件下，对在正常色散渐变折射率多模光纤中传播的光进行光谱分析。基于在存在噪声的情况下通过多次模拟获得的光谱，我们通过散点图和频率相关能量关联图研究了分离良好的光谱边带之间的能量相关性，发现共轭对具有高度相关性，而交叉组合的相关性非常低。这些结果表明，与每个边带对相关的几何参数不稳定性过程彼此独立发生，这可以为几何参数不稳定性的基本动力学效应提供重要见解，并有助于未来实现具有降低拉曼去相关的高效光子对源。
