通过水下介质传播的径向地毯光束的探测与分类

IF 1.8 4区 物理与天体物理 Q3 OPTICS Journal of The Optical Society of America B-optical Physics Pub Date : 2023-10-30 DOI:10.1364/josab.504960
Mohammad Reza Jafarfard, Mahdi Khodadadi Karahroudi
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引用次数: 0

摘要

径向地毯(RC)光束是一种结构光束,被归类为组合半整数类贝塞尔光束的一个亚族。考虑到这些结构模态的结构复杂性和在湍流环境中传播过程中模态质量的恶化,相干检测可能是困难的。本文首先研究了叉形衍射光栅对RC模态的检测,然后提出了一种基于DenseNet-201结构的卷积神经网络模型训练的非相干检测方法,对16类RC模态进行分类。该数据集包括在湍流水下环境中传播120厘米后RC模式的记录图像。正如评估表明的那样,分类器在识别中等湍流中测量的RC模式时具有98%的准确率,强度水平为c2 ~ 10−12 m−2/3。该方法消除了在衍射光栅等相干检测技术中使用多个光学元件所带来的困难。除了简化光学系统设置外,它还减少了实现的体积和成本,特别是在光通信应用中。
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Detection and Classification of Radial Carpet Beams Propagating Through Underwater Medium
A radial carpet (RC) optical beam is a type of structured light beam that is classified as a subfamily of combined half-integer Bessel-like beams. Coherent detection of such structured modes can be difficult given their structural complexity and the deterioration of the quality of modes during propagation in turbulent environments. In this paper, we first study the detection of RC modes by using fork-shaped diffraction gratings and then propose an incoherent detection approach to classify 16 classes of RC modes based on training a convolutional neural network model using DenseNet-201 architecture. The dataset comprises recorded images of RC modes after a 120 cm propagation length in a turbulent underwater environment. As the evaluations indicate, the classifier has an accuracy of 98% in identifying RC modes measured in moderate turbulence with a strength level of C n 2 ∼10 −12 m −2/3 . This method eliminates the difficulties caused by the use of multiple optical elements in coherent detection techniques such as diffraction gratings. Besides simplifying the optical system settings, it also reduces the volume and cost of implementation, especially in optical communication applications.
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来源期刊
CiteScore
4.00
自引率
5.30%
发文量
374
审稿时长
2.1 months
期刊介绍: The Journal of the Optical Society of America B (JOSA B) is a general optics research journal that complements JOSA A. It emphasizes scientific research on the fundamentals of the interaction of light with matter such as quantum optics, nonlinear optics, and laser physics. Topics include: Advanced Instrumentation and Measurements Fiber Optics and Fiber Lasers Lasers and Other Light Sources from THz to XUV Light-Induced Phenomena Nonlinear and High Field Optics Optical Materials Optics Modes and Structured Light Optomechanics Metamaterials Nanomaterials Photonics and Semiconductor Optics Physical Optics Plasmonics Quantum Optics and Entanglement Quantum Key Distribution Spectroscopy and Atomic or Molecular Optics Superresolution and Advanced Imaging Surface Optics Ultrafast Optical Phenomena Wave Guiding and Optical Confinement JOSA B considers original research articles, feature issue contributions, invited reviews and tutorials, and comments on published articles.
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