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
针对光栅尺、容栅尺等位移测量仪器不易于现场安装的缺点,提出一种基于图像处理的位移传感器装置,使其在满足分辨率与响应速度的条件下,最大限度降低安装要求。该传感器基于激光鼠标原理,通过改进光学组件,使得传感器与参照物可以保持比较长的非接触空间。同时根据不同场合的需求,换装不同放大率的光学组件,以得到不同工作距离、分辨率的传感器。实验表明,该传感器易于安装在多数平面运动的待测物上,具有成本低、精度高、线性度好的优点,可广泛用于普通机床的数显改造、机器人的精确定位等场合。
位移测量 速度测量 精确定位 激光鼠标传感器 机床数显改造 displacement measurement velocity measurement accurate positioning laser mouse sensor digital transformation of machine tool
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
1 西藏民族大学 信息工程学院, 陕西 咸阳 712082
2 西安石油大学 光电油气测井与检测教育部重点实验室, 陕西 西安 710065
3 上海理工大学 光电信息与计算机工程学院, 上海 200093
为了解决糖尿病人血糖检测的有创问题, 以生物特征检测技术为基础, 设计了一种近红外透射光谱法的多信息融合无创血糖检测系统, 并测试了系统性能。通过建立数学模型对该系统实测的数据进行处理, 得到人体的血糖值。试验结果表明, 本系统与传统血糖仪检测结果的相关系数达到了0.854 2。同时该系统可以对人体血糖变化趋势进行记录, 为连续监测血糖值提供了新方法。
多信息融合 无创 血糖检测 multi-information fusion noninvasive blood glucose meter STM32 STM32
