量子光场的关联性质是量子光学研究的一个重要主题。在对其深入挖掘的过程中, 人们在经典光场关联性质方面的研究也取得了一系列重要进展。尤其是结合近二十年来在光信息处理方面备受关注的轨道角动量自由度, 观察到许多与高维量子光关联性质相对应的现象。本综述对轨道角动量光束中的经典光关联相关研究进行了总结, 介绍了轨道角动量光束中的局域不可分离性及其应用, 对空间可分离轨道角动量光束中的经典光关联也做了讨论。特别地, 作为一种潜在的量子过程研究平台, 还对基于轨道角动量光束的随机行走研究作了介绍。
傅里叶光学 轨道角动量光关联 光学相干 量子模拟 Fourier optics correlation of orbital angular momentum light optical coherence quantum simulation
Author Affiliations
Abstract
1 School of Physics and Key Laboratory of Weak-Light Nonlinear Photonics, Nankai University, Tianjin 300071, China
2 National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
In free-space or in optical fibers, orbital angular momentum (OAM) multiplexing for information transmission has been greatly developed. The light sources used were well coherent communication bands, and the fibers used were customized. Here, we use an 810 nm femtosecond laser to generate optical vortices carrying OAM and then feed them into two kinds of commercial step-index few-mode fibers to explore the transmission characteristics of OAM modes. We also propose a method without multiple-input multiple-output digital signal processing to identify the input OAMs. It is of great guiding significance for high-dimensional quantum information experiments via the OAMs as a degree of freedom, using the light generated by the spontaneous parametric down-conversion as the source and the commercial fibers for information transmission.
060.2310 Fiber optics 050.4865 Optical vortices 080.4865 Optical vortices Chinese Optics Letters
2019, 17(12): 120601
Author Affiliations
Abstract
1 MOE Key Laboratory of Weak Light Nonlinear Photonics and School of Physics, Nankai University, Tianjin 300071, China
2 National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China
3 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
Transporting information is one of the important functions of photons and is also the essential duty of information science. Here, we realize multiple imaging by detecting photons with changeable wavelengths based on time-resolved correlation measurements. In our system, information from multiple objects can be transported. During this process, the wavelength of the photons illuminating the objects is different from the wavelength of the photons detected by the detectors. More importantly, the wavelength of the photons that are utilized to record images can also be changed to match the sensitive range of the used detectors. In our experiment, images of the objects are reconstructed clearly by detecting the photons at wavelengths of 650, 810, and 1064 nm, respectively. These properties should have potential applications in information science.
110.4190 Multiple imaging 110.6915 Time imaging Chinese Optics Letters
2017, 15(8): 081101
1 上海出版印刷高等专科学校, 上海 200093
2 上海理工大学出版印刷与艺术设计学院, 上海 200093
对印刷清晰度视觉感知质量的检测算法及其评价模型进行了研究。通过对印刷清晰度影响因素的分析，设计了一个含倾斜刃边的印刷清晰度测试靶标，提出了一种优化的基于截断频带的印刷清晰度质量指标检测算法；对26个具有不同清晰度效果的数字印刷品开展了清晰度的客观测量和主观评价，基于主客观数据耦合构建了一种新的印刷清晰度感知质量评价模型。另抽取20个数字印刷品进行验证，对印刷清晰度感知质量的预测得分与主观评价得分的相关性进行了分析，结果显示两者间具有很好的一致性,相关系数达到0.9916,说明印刷清晰度感知质量的定量测评方法可行、有效，可解决印刷业长期以来只能依靠人眼进行主观目测评价印刷清晰度的问题。
视觉光学 印刷清晰度 倾斜刃边 视觉感知质量 评价模型
中国计量学院光学与电子科技学院, 浙江 杭州 310018
基于法布里珀罗（FP）结构的光纤光栅功能型器件的研制和应用是近年来光纤光栅领域研究方向细化后的一个热点，其在光纤通信、光纤传感等领域都具有重要的应用。综述了近几年FP结构光纤光栅功能型器件的研究进展，其中包括多波长滤波器、可调谐色散补偿器、分布布拉格反射（DBR）激光器、多参数传感器和高灵敏度超声水听器等。
光纤光学 光纤布拉格光栅 法布里珀罗干涉仪 滤波器 光纤传感 水听器 激光与光电子学进展
2011, 48(12): 120604
