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Journal of The Optical Society of America B-optical Physics最新文献

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Inverse Compton gamma-ray source driven by plasma flying mirror 由等离子体飞镜驱动的逆康普顿伽马射线源
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-31 DOI: 10.1364/josab.501658
Xiaolong Zheng
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引用次数: 0
Evaluation of beam shape coefficients in T-matrix methods using a finite series technique: on blowing-ups using hypergeometric functions and generalized Bessel polynomials 用有限级数技术计算t矩阵方法中的梁形系数:关于利用超几何函数和广义贝塞尔多项式的爆破
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-30 DOI: 10.1364/josab.505169
Gerard Gouesbet, Luiz Felipe Votto, Leonardo Ambrosio
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引用次数: 1
Detection and Classification of Radial Carpet Beams Propagating Through Underwater Medium 通过水下介质传播的径向地毯光束的探测与分类
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-30 DOI: 10.1364/josab.504960
Mohammad Reza Jafarfard, Mahdi Khodadadi Karahroudi
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.
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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引用次数: 0
Metamirror-based Quantum Well Infrared Photodetectors with non-uniform grating 基于超镜的非均匀光栅量子阱红外探测器
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-30 DOI: 10.1364/josab.504535
Hengrui Jiang, Jianlin Feng, Jun Zhao, Dayuan Xiong
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引用次数: 0
A Quantum Extension to the Semiclassical Theory of Electrical Susceptibility 半经典电敏感性理论的量子推广
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-30 DOI: 10.1364/josab.502568
Jairo David García, Boris A. Rodríguez
The semiclassical expressions for susceptibilities are inadequate when quantum aspects of light become prominent. A more appropriate formulation of the electrical susceptibility theory requires the quantization of the electromagnetic field. We show here a way to do this up to the second order, within a low-dimensional system. The generalized expressions reveal that susceptibilities depend on the quantum state of light. As experimentally verifiable consequences of this, we predict new phenomena such as photon number-dependent refractive index, even in the linear regime, and non-quadratic second harmonic generation, which should be appreciable when very low-intensity coherent light is involved. We also deduce when the semiclassical expressions, which happen to be particular cases of those derived here, can be used confidently.
当光的量子方面变得突出时,磁化率的半经典表达式是不充分的。一个更合适的电磁化率理论的表述需要电磁场的量子化。我们在这里展示了一种在低维系统中,达到二阶的方法。广义表达式表明,磁化率依赖于光的量子态。作为实验验证的结果,我们预测了新的现象,如光子数依赖的折射率,即使在线性体制,和非二次谐波产生,这应该是值得注意的,当非常低强度的相干光涉及。我们还推导出半经典表达式(碰巧是这里推导出的那些表达式的特殊情况)在什么时候可以自信地使用。
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引用次数: 0
Semiclassical calculation of the power-saturation of the Kerr effect in Rb vapor Rb蒸气中克尔效应功率饱和的半经典计算
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-30 DOI: 10.1364/josab.503903
Zachary Levine, Ziran Du
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引用次数: 0
Dispersion models exhibiting natural optical activity: application to tartaric acid solutions 显示天然光学活性的色散模型:在酒石酸溶液中的应用
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-27 DOI: 10.1364/josab.498720
Beáta Hroncová, Daniel Franta, Jan Dvorak, David Pavlinak
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引用次数: 0
Modified genetic algorithm for inverse design of anti-resonant hollow core fiber with low confinement loss 基于改进遗传算法的低约束损耗抗谐振空心光纤反设计
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-27 DOI: 10.1364/josab.506668
Chen Ruifeng, Feng Ye, Zimiao Wang, Jiayao Huang, Qian Li
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引用次数: 0
Switching and vector characteristics of bound-state solitons in graphene-based mode-locked fiber laser 石墨烯锁模光纤激光器中束缚态孤子的开关和矢量特性
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-25 DOI: 10.1364/josab.506760
Geng Li, Xingwei Li, Shuguang Li, jianshe li, ying Guo, Xiaojian Meng, MENGLEI PEI, Xingwang Cui, Ling Qin, Meng Li
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引用次数: 0
Focal-plane wavefront sensing with photonic lanterns II: numerical characterization and optimization 光子灯的焦平面波前传感II:数值表征与优化
4区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2023-10-25 DOI: 10.1364/josab.502962
Jonathan Lin, Michael Fitzgerald, Yinzi Xin, Yoo Jung Kim, Olivier Guyon, Sergio Leon-Saval, Barnaby Norris, Nemanja Jovanovic
We present numerical characterizations of the wavefront sensing performance for few-mode photonic lantern wavefront sensors (PLWFSs). These characterizations include calculations of throughput, control space, sensor linearity, and an estimate of maximum linear reconstruction range for standard and hybrid lanterns with 3 to 19 ports, at a wavelength of 1550 nm. We additionally consider the impact of beam-shaping optics and a charge-1 vortex mask, placed in the pupil plane. The former is motivated by the application of PLs to high-resolution spectroscopy, which could enable efficient injection into the spectrometer along with simultaneous focal-plane wavefront sensing; similarly, the latter is motivated by the application of PLs to vortex fiber nulling (VFN), which can simultaneously enable wavefront sensing and the nulling of on-axis starlight. Overall, we find that the PLWFS setups tested in this work exhibit good linearity out to ~0.25-0.5 radians of RMS wavefront error (WFE). Meanwhile, we estimate the maximum amount of WFE that can be handled by these sensors, before the sensor response becomes degenerate, to be around ~1-2 radians RMS. In the future, we expect these limits can be pushed further by increasing the number of degrees of freedom, either by adopting higher-mode-count lanterns, dispersing lantern outputs, or separating polarizations. Lastly, we consider optimization strategies for the design of the PLWFS, which involve both modification of the lantern itself and the use of pre- and post-lantern optics like phase masks and interferometric beam recombiners.
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引用次数: 0
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Journal of The Optical Society of America B-optical Physics
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