基于掺铒光纤单光子源的研究

发布时间：2018-04-14 16:04

本文选题：单光子源 + 掺铒光纤　；参考：《聊城大学》2017年硕士论文

【摘要】：单光子源在量子物理学和量子通信中有着极其重要的作用,在量子光学所涉及到的光源中是一种很基本的光源,有着很普遍的应用。自研究人员发现单光子源的重要性,量子信息科学领域中对于单光子源和单光子探测器的研究出现爆发式增长。量子信息科学涉及到编码、通信、处理和利用量子力学粒子测量信息。研究表明量子计算中利用量子比特比经典粒子有着更高的安全性。单光子源的制备已经在很多材料或系统中实现:单原子、单分子、量子点和色心等,单光子源在量子力学基础实验和量子计算以及光量子信息处理中有着很重要的应用。每一种制备方法有它的优点,但同时也有相应的缺陷限制着它的使用。具有高效率和高度不可区分性的单光子源在半导体量子点中已经被发现,但是其需要的很低的温度成为了其商用化的主要障碍。为此本文提出一种可以工作在室温环境条件下,具有高度不可区分性,波长可调的确定性的单光子源,这种单光子源是基于掺杂铒(3(10)Er)粒子的掺铒光纤的,由于掺杂了铒粒子,使得光纤具有自发辐射特性。在分析各种单光子源的制备方法和优缺点以及单光子源理论基础后,提出基于掺铒光纤的单光子源,并搭建实验系统测量其主要的性能指标:不可区分性和二阶相关函数,利用单光子源探测器进行符合探测,通过实验测量和计算,最终测量得到的不可区分性高达99%,显示了基于掺铒光纤的单光子源在量子通信中的潜在应用。通过单光子探测器探测,单光子探测器通道1和通道2在零延时处的符合计数为零,这一实验结果掺铒光纤经过衰减之后,是可以制备单光子源的,而且很是接近理想的单光子源。
[Abstract]:Single photon source plays an extremely important role in quantum physics and quantum communication. It is a very basic light source in quantum optics and has a very common application.Since researchers have discovered the importance of single photon sources, the research of single photon sources and single photon detectors in the field of quantum information science has increased explosively.Quantum information science involves coding, communication, processing and using quantum mechanical particles to measure information.It is shown that the use of quantum bits in quantum computation is more secure than that of classical particles.The preparation of single photon source has been realized in many materials or systems: single atom, single molecule, quantum dot and color center, etc. Single photon source has important applications in quantum mechanics basic experiments, quantum calculation and optical quantum information processing.Each preparation method has its own advantages, but at the same time, there are corresponding defects to limit its use.Highly efficient and indistinguishable single photon sources have been found in semiconductor quantum dots, but their low temperature is the main obstacle to their commercialization.In this paper, a deterministic single-photon source with highly indistinguishable and tunable wavelength is proposed, which is based on erbium-doped erbium-doped fiber with Erbium ~ (3 +) ~ (10) er) particles, because it is doped with er ~ (3 +) particles.The fiber has spontaneous emission characteristics.After analyzing the preparation methods, advantages and disadvantages of various single photon sources and the theoretical basis of single photon sources, a single photon source based on erbium-doped fiber is proposed, and the main performance indexes are measured by an experimental system: indiscernibility and second-order correlation function.The coincidence detection with single photon source detector is carried out. Through experimental measurement and calculation, the indiscernibility of the final measurement is as high as 99%, which shows the potential application of single photon source based on erbium doped fiber in quantum communication.Through single photon detector detection, the coincidence counting of channel 1 and channel 2 at zero delay is zero. After attenuation of erbium doped fiber, single photon source can be prepared.And very close to the ideal single photon source.
【学位授予单位】：聊城大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN253

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