Article
Optics
Jiahao Zhi, Bo Hu, Yuncheng Guo, Zhitong Sun, Xiaogang Wang, Zhifang Qiu, Hao Ying, Bijun Xu
Summary: This study introduces a method for generating non-diffractive Lommel beams based on all-dielectric metasurfaces, with good focal depth and broadband characteristics, demonstrating excellent self-healing properties. By combining the phase of the Dammann grating, a metasurface capable of producing a Lommel beam array is successfully created.
Article
Multidisciplinary Sciences
Huu Dat Nguyen, Enrique Moreno, Anton Rudenko, Nicolas Faure, Xxx Sedao, Cyril Mauclair, Jean-Philippe Colombier, Razvan Stoian
Summary: A highly efficient drilling process is achieved in non-transparent metallic materials using non-diffractive ultrafast Bessel beams. Compared to Gaussian beams, the Bessel beams demonstrate twofold higher drilling efficiency due to their ability to self-replicate and reconstruct along the axis, bypassing potential obstacles.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Menyang Gong, Yupei Qiao, Zhonghan Fei, Yuanyuan Li, Jiehui Liu, Yiwei Mao, Aijun He, Xiaozhou Liu
Summary: This study proposed a prediction method for generating negative acoustic radiation force using non-diffractive acoustic beam, and analyzed its underlying physical mechanism. By analyzing energy flux density, the analytical region of negative radiation generated by non-diffractive beam was completely solved. This lays the foundation for realizing acoustic tweezers and designing devices that produce negative ARFs.
Article
Optics
Huiyu Qi, Guangyue Shen, Zhaohui Li, Haotian Shi, Chao Hang, Guoxiang Huang, Guang Wu
Summary: A 3D imager using pulsed Bessel beams is developed to reconstruct high-resolution 3D profiles of target objects in high-noise environments. The diffraction-free and self-healing properties of Bessel beams enable high-quality imaging even with opaque scatters.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Reza Aghbolaghi, Habib Sahebghoran Charehjaloo, Mohammad Hossein Daemi
Summary: Nondiffracting modes were experimentally generated in an end-pumped thin-disk laser with a new kind of axicon-based stable laser resonator. The eigenvalue and eigenvector of the resonator were investigated based on the geometrical optics view. Ytterbium ions doped in the YAG crystal as an active medium were then utilized in this configuration. The experimental generation of Mathieu-Gauss and Ince-Gauss modes was performed and also discussed during the thin-disk deformation.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Optics
Yanping Lan, Juntao Hu, Wenni Ye, Peiqi Zeng, Yixian Qian
Summary: We propose a universal approach to design and generate non-diffracting structured light beams with arbitrary shapes. A practical spectral superposition algorithm is developed to discuss the non-diffracting properties and experimental results confirm the numerical findings. These structured beams differ from classical non-diffracting beams and have the potential for new applications in optical micromachining.
Article
Optics
Yuriy Egorov, Alexander Rubass
Summary: We investigated the value of spin-orbit coupling as the energy efficiency of energy transfer between orthogonal components. The energy efficiency changes as the beam propagates through the crystal. For different types of beams, such as Gaussian, Hermite-Gaussian, Laguerre-Gaussian, the energy efficiency varies, with higher orders of complex argument beams having a higher efficiency. We found that zero-order Bessel-Gauss beams can achieve close to 100% energy efficiency when generating an axial vortex in the orthogonal component, while polychromatic Laguerre-Gauss or Hermite-Gauss beams have a reduced energy efficiency not exceeding 50%.
Review
Optics
Abdelghani Chafiq, Abdelmajid Belafhal
Summary: This study investigates the generation of Fourier transforms of nondiffracting beams modulated by Gaussian envelopes and their propagation through free space. The research demonstrates that by selecting appropriate parameters, the Fourier transform can be related to the image of the angular spectrum of nondiffracting beams, such as circular rings for Bessel beams or two light points for cosine beams. Additionally, results show that the Fourier transform beams diffract after the focal plane due to the presence of Gaussian envelopes.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Optics
Edgar Medina-Segura, Leonardo Miranda-Culin, Valeria Rodriguez-Fajardo, Benjamin Perez-Garcia, Carmelo Rosales-Guzman
Summary: In this work, a new family of vector beams called helico-conical vector beams (HCVBs) is proposed and experimentally demonstrated. The spatial degree of freedom of the beams is encoded in the helico-conical optical beams. The study finds that the transverse polarization distribution of the beams evolves from nonhomogeneous to quasihomogeneous during propagation. The Hellinger distance metric is used to quantitatively verify this behavior. HCVBs are the second family of vector beams to exhibit this behavior, which opens up possibilities for applications in optical tweezing or information encryption.
Article
Thermodynamics
Xinli Xu, Chunwei Zhang, Afrasyab Khan, Tamer A. Sebaey, Mohammad Alkhedher
Summary: This research explores the first natural frequency of rotating nanocomposite beams, incorporating Reddy's third order shear deformation theory and discretizing motion equations in space using the Ritz technique. The study reveals qualitative discrepancies in the analyses of different types of beams, and deviations between the outcomes based on the Reddy's theory and Timoshenko beam theory for certain beam types.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Optics
Chengming Lyu, Milivoj R. Belic, Yongdong Li, Yiqi Zhang
Summary: In this paper, we investigate the generation and propagation of diffraction-free Bessel beams by combined axicons. Theoretical analysis and experimental results show that these beams can propagate up to 9.63 km in free space. By utilizing the angular spectrum reconstruction theory, the propagation distance can be extended up to 15 km. The self-healing property and outstanding performance of Bessel beams in weak to moderate turbulence atmosphere are also demonstrated.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Mathematics, Applied
Victor-Cristian Palea, Liliana Preda
Summary: The algorithm proposed is capable of generating non-diffractive and self-accelerating solutions, with local properties of the initial conditions being related to the shape of the solution's amplitude profile.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2021)
Article
Optics
Lyubomir Stoyanov, Maya Zhekova, Aleksander Stefanov, Boris Ivanov, Ivan Stefanov, Gerhard G. Paulus, Alexander Dreischuh
Summary: The research team demonstrated a novel approach to generate long-range Gauss-Bessel beams by imprinting a vortex in a Gaussian beam and focusing/Fourier-transforming the ring-shaped beam with a lens. This method can achieve divergence angles in the microradian range and Gauss-Bessel beam lengths up to 2.5 m.
OPTICS COMMUNICATIONS
(2021)
Article
Physics, Applied
Alessio Benedetti, Walter Fuscaldo, Davide Comite, Silvia Tofani, Paolo Baccarelli, Alessandro Galli, Paolo Burghignoli
Summary: This paper proposes a design technique using controlled spiral filaments with dynamic mechanical deformations to tune the size and shape of the non-diffractive region, instead of traditional metal ring designs. This alternative technological solution has inherent advantages and provides detailed guidelines and examples.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Optics
Hongmin Han, Jianqiang Ma, Bo Tao, Chao Xu, Yanlei Hu, Jiaru Chu
Summary: This paper successfully generates high-quality white-light Airy beams and Bessel beams using a deformable mirror by modulating the incident LED beam with tunable wavefronts. The generated white-light non-diffraction beams are not affected by chromatic dispersion during propagation, and the generation of white-light Bessel beams has higher requirements for spatial coherence.
Article
Physics, Applied
Yanwang Zhai, Shiyao Fu, Jianqiang Zhang, Yanlai Lv, Heng Zhou, Chunqing Gao
APPLIED PHYSICS EXPRESS
(2020)
Article
Optics
Yanwang Zhai, Shiyao Fu, Jianqiang Zhang, Xueting Liu, Heng Zhou, Chunqing Gao
Article
Optics
Shiyao Fu, Xu Han, Rui Song, Lei Huang, Chunqing Gao
Article
Optics
Hao Wang, Shiyao Fu, Chunqing Gao
Summary: This paper presents a new method for generating complex optical vortex (POV) arrays using combined phase-only holograms, enabling dynamically controllable multi-ring, TC, eccentricity, size, and the number of optical vortices. By setting up a beta(g) library to obtain optimized double-ring POV elements, a series of POV arrays are generated, demonstrating the versatility of the method and revealing analytical relationships between set parameters and intensity patterns.
Article
Optics
Kaixin Wang, Shiyao Fu, Kexin Zhang, Mingwei Gao, Chunqing Gao
Summary: A new slab configuration based on the traditional Yb:YAG TRAM slab laser is designed, with the grad-doping method proposed to improve pump uniformity and reduce thermal effects. The results show that the maximum temperature and stress decrease significantly with the grad-doping method, leading to better beam quality and potentially higher power output.
APPLIED PHYSICS B-LASERS AND OPTICS
(2021)
Article
Physics, Multidisciplinary
Shiyao Fu, Lan Hai, Rui Song, Chunqing Gao, Xiangdong Zhang
Summary: It has been confirmed that beams carrying total angular momentums (TAMs) consisting of spin angular momentums (SAMs) and orbital angular momentums (OAMs) are widely used in classical and quantum optics. A new four-parameter representation is proposed to describe TAM states of arbitrary beams, allowing convenient representation of various polarizations, scalar vortices, and complex vectorial vortex fields resulting from TAMs. The proposed representation can also reveal the internal change of TAMs between SAMs and OAMs, offering a universal form of TAMs for complex polarizations and exotic vectorial vortex beams.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
Jiaqi Wang, Shiyao Fu, Zijun Shang, Lan Hai, Chunqing Gao
Summary: This study proposes a method for measuring the OAM spectrum using a deep neural network and a phase-only diffraction optical element. The optimized neural network can analyze the diffraction pattern to calculate the OAM spectrum. The experimental results show excellent performance in terms of precision, speed, and robustness to noise and scaling.
Review
Optics
Zhichao Zhang, Lan Hai, Shiyao Fu, Chunqing Gao
Summary: In this review, intra-cavity generation approaches to vortex beams in solid-state lasers are summarized, and our research on 1.6μm eye-safe vector vortex lasers is introduced.
Article
Optics
Zijun Shang, Shiyao Fu, Lan Hai, Zhichao Zhang, Lang LI, Chunqing Gao
Summary: In this study, an integrated phase-only scheme is proposed to generate multiple multiplexed vortex beams simultaneously, forming a multiplexed vortex state array. Proof-of-concept experiments show good agreement with simulations, validating the feasibility of the proposed scheme. Additionally, the scheme can be used for high-dimensional data coding and enables one-to-many multicasting links in free space, demonstrating the potential for future optical networks.
Article
Optics
Yanlai Lv, Zijun Shang, Shiyao Fu, Lei Huang, Liliang Gao, Chunqing Gao
Summary: This study proposes a design of an OAM beam splitter based on a phase modulator, which can separate different OAM components into different positions and achieve OAM state probing. Experimental results demonstrate the good performance of the design and the ability to diagnose the OAM spectrum.
Article
Optics
Kaixin Wang, Xu Zhang, Shiyao Fu, Chunqing Gao
Summary: This study demonstrates the generation of a 1645-nm single-frequency vortex beam with narrow linewidth from an Er:YAG nonplanar ring oscillator (NPRO) using an annular pump beam. The pump beam, shaped by an axicon, is derived from a 1532-nm fiber laser. Under a pump power of 13 W, the Er:YAG NPRO generates a 1.96-W single-frequency vortex beam. The linewidth of the 1645-nm vortex laser is measured to be 6 kHz. This work presents a convenient approach for the generation of single-frequency vortex beams.
Article
Engineering, Electrical & Electronic
Yingchi Guo, Lang Li, Jiaqi Wang, Chunqing Gao, Shiyao Fu
Summary: Beams carrying orbital angular momentum (OAM) have gained significant attention due to their potential in various applications. However, distortion occurs when OAM beams propagate through inhomogeneous media like atmospheric turbulence, leading to interchannel crosstalk and degraded performance. Therefore, it is necessary to develop distortion correction techniques to improve the robustness of OAM beams in atmospheric turbulence.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Lan Hai, Zhichao Zhang, Shilong Liu, Lang Li, Zhiyuan Zhou, Qing Wang, Yanze Gao, Chunqing Gao, Yijie Shen, Shiyao Fu
Summary: This paper proposes a method to generate and control multi-partite non-separable states by manipulating the degrees of freedom inside a laser cavity, and employs convolutional neural network for state tomography. The work provides a compact device for quantum simulation and quantum scenarios.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Rui Song, Xueting Liu, Shiyao Fu, Chunqing Gao
Summary: This paper demonstrates a scheme to tailor both longitudinal and transverse modes inside a laser cavity to create an eye-safe single longitudinal mode Er:YAG vector laser. By using a q-plate and an optical isolator, characteristics of power, transverse intensity, and polarization spectrum of the output beams are observed, showing successful tailoring of both longitudinal and transverse modes.
CHINESE OPTICS LETTERS
(2021)
Article
Optics
Heng Zhou, Chunqing Gao, Shiyao Fu, Yanwang Zhai, Jianqiang Zhang
CHINESE OPTICS LETTERS
(2020)
