上海理工大学光电信息与计算机工程学院，上海 200093
为研究艾里光束的聚焦特性，基于几何相位推导出了圆柱坐标系下聚焦区域附近电磁强度矢量和能量通量的理论公式，并利用矢量衍射理论对其可行性进行了验证。结果表明：几何相位调制参数可以显著改变艾里光束的主瓣尺寸、光瓣间距和能量分布；通过在艾里光束原立方相位基础上引入涡旋相位，有效地转换了光束主瓣的能量和相位，且光束主瓣不再保持原有形态。本研究为艾里光束在光学采样与操作、光通信、数据存储和成像等领域中的应用提供了一定的基础。
衍射 几何相位 矢量衍射理论 艾里光束 能量分布 光学学报
2022, 42(14): 1405006
上海理工大学光电信息与计算机工程学院，上海 200093
近些年来，涡旋光束特有的相位结构和携带轨道角动量（OAM）特性，使其在光通信、光操纵、成像、传感到量子信息等领域具有广泛的应用前景。但这些应用都必须依赖于高质量涡旋光束的产生，因此光学微腔凭借自身结构紧凑、品质因子高、元件体积小等优点，研制出的新型集成光学器件能够发射出高质量涡旋光束，在现代光电子器件制造中占据十分重要的地位。综述了光学微腔产生OAM光束的原理、研究进展、设计方案以及实验生成，同时对已有的OAM激光器性能进行分析，最后对集成光学器件应用领域面临的挑战和进一步改进方向进行展望。
集成光学 集成光学器件 涡旋光束 轨道角动量 回音壁模式微腔 光子晶体微腔 激光与光电子学进展
2022, 59(1): 0100002
Author Affiliations
Abstract
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
The unevenly distributed Lorentz–Gaussian beams are difficult to reproduce in practice, because they require modulation in both amplitude and phase terms. Here, a new linearly polarized Lorentz–Gauss beam modulated by a helical axicon (LGB-HA) is calculated, and the two various experimental generation methods of this beam, Fourier transform method (FTM) and complex-amplitude modulation (CAM) method, are depicted. Compared with the FTM, the CAM method can modulate the phase and amplitude simultaneously by only one reflection-type phase-only liquid crystal spatial light modulator. Both of the methods are coincident with the numerical results. Yet CAM is simpler, efficient, and has a higher degree of conformance through data comparison. In addition, considering some barriers exist in shaping and reappearing the complicated Lorentz–Gauss beam with heterogeneous distribution, the evolution regularities of the beams with different parameters (axial parameter, topological charge, and phase factor) were also implemented.
Lorentz-Gauss beams Fourier transform method complex-amplitude modulation spatial light modulator Chinese Optics Letters
2021, 19(2): 022602
Author Affiliations
Abstract
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
In this Letter, vortex phase and sinusoidal phase modulations of Hermite–Gaussian beams are studied theoretically and experimentally. The coding method of the experiment is introduced in detail, and the evolution law of focus under different beam order (m, n) and topological charge (l) is given. In order to verify the accuracy of the generation experiment, the optical field distribution under sinusoidal vortex modulation is analyzed deeply. The relevant analysis and methods provided in this Letter have certain practical significance for the development of laser mode analysis, optical communication, and other fields.
Hermite–Gaussian beams phase modulation sinusoidal vortex phase modulation spatial light modulator focus mode Chinese Optics Letters
2020, 18(4): 042601
上海理工大学 光电信息与计算机工程学院, 上海 200093
评述了近十几年来K原子磁力仪的研究进展,介绍了K原子磁力仪的工作原理、优缺点,以及相关的应用。提出了一种新型的脑磁图检测装置以及一种全新的基于K原子磁力仪的脑磁场检测方法。最后,在综述K原子磁力仪的基础上,对其应用前景进行了展望。
碱金属原子 磁力计 K原子 无自旋交换弛豫 灵敏度 alkali metal atomic magnetometer K atoms free-exchange spin relaxation sensitivity
上海理工大学 光电信息与计算机工程学院, 上海 200093
以生物特征检测技术为基础,基于已经构建的无创血糖检测系统进行血糖检测数据分析。以光电检测技术为主,结合其他人体特征信息检测,对人体进行无创血糖测试得到大量数据,建立数学模型并利用算法来计算血糖浓度。与一种常用有创血糖仪检测数据进行对比,有创与无创检测结果的相关系数达到了85.4%,为多信息融合无创血糖检测系统提供了一种有效的数据处理方法。
多信息融合 无创 血糖检测 multi-information fusion non-invasive blood glucose detection
