Advanced Light Scattering in Fiber: Theory and Applications

传统的电信光纤在许多其他应用领域中有着广泛的用途。在这项研究计划中，先进的光散射物理研究的目的是产生转换的应用程序。当光被注入光纤时，它可以通过量子声能单元（声子）散射，使得出射光的能量相应地发生变化。两个具有适当能量和动量的量子入射光子可以同时与一对相干的量子声子相互作用，从而产生一对量子纠缠光子。该光纤兼容量子纠缠光子对源可用于建立量子力学通信协议下的绝对安全的通信信道。政府机构、金融机构和其他具有高度社会重要性的组织之间的安全通信将使公众更加安全。利用光纤的色散和非线性特性，构造频谱放大显微镜是本研究计划的另一个方向。就像普通的显微镜，放大空间特征，否则无法用肉眼看到。这种频谱显微镜将使科学家能够研究生物细胞生命周期和化学反应等系统的精细动态特性。这种类型的时间分辨频谱显微镜将为科学家提供新的工具来寻找治疗各种疾病的方法，甚至发现更有效的控制化学反应的方法。本文还提出了一种基于随机瑞利散射的超窄线宽光纤激光器，可用于光学计量领域。在正常色散光纤和反常色散光纤中研究了通过反斯托克斯荧光实现光纤激光器冷却。

The conventional telecom fibers can find vast usages in many other areas of applications. In this research program advanced light scattering physics is investigated for the purpose of generating transforming applications. When a light is injected into a fiber it can be scattered via the quantum acoustic energy unit (phonons) such that outgoing lights are correspondingly shifted in their energies. Two quantum incident photons possessing the right energy and momentum they could simultaneously interact with a coherent quantum pair of phonons thus giving rise a pair of quantum entangled photons. This fiber compatible quantum entangled photon pair source can be used to build communication channels with absolute security according to quantum mechanics communication protocol. Secure communication between government agencies, financial institutions and other organizations of high societal importance will make public more safe. Another direction of this research program is to construct frequency spectrum magnifying microscope via fiber's dispersion and nonlinear properties. Like usual microscope that magnifies spatial features otherwise unable to be seen with naked eye. This kind of frequency spectrum microscope will enable scientists to investigate fine dynamic properties of systems like biological cell life cycles and chemical reactions. This type of time resolved frequency spectral microscope will give scientists new tools to find methods to treat various diseases, and even to discover more efficient ways of control chemical reactions. An ultra-narrow linewidth fiber laser based on random Rayleigh scattering is also proposed for this program which can be used in the area of optical metrology. Optical fiber laser cooling via anti-Stokes fluorescence will be investigated in normal and anomalous dispersive fibers.