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Dual-point noncoaxial rotational doppler effect towards synthetic OAM light fields for real-time rotating axis detection

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Light(Advanced Manufacturing) 2023年第4期4卷 10-20页

作者： Yanxiang Zhang Zijing Zhang Han Lin Zhongquan Nie Rui Feng Yuan Zhao Baohua Jia School of Physics Harbin Institute of TechnologyHarbin 150001China Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceCollege of Electronic Information and Optical EngineeringTaiyuan University of TechnologyTaiyuan 030024China Centre for Atomaterials and Nanomanufacturing(CAN) School of ScienceRMIT UniversityMelbourne3000 VICAustralia

Probing the axis of a rotator is important in astrophysics,aerospace,manufacturing,machinery,automation,and virtual reality,*** optical solutions commonly require multiple sequential measurements via symmetry-broken light fields,which make them time-consuming,inefficient,and prone to accumulated ***,we propose the concept of a dual-point noncoaxial rotational doppler effect(DNRDE)and demonstrate a one-shot detection technique to solve this *** on-demand synthetic orbital angular momentum(OAM)light beam impinges on a rotating scatterer surface,supporting dual-point rotational doppler shifts,in which the information of the rotating axis is acquired by comparing these two frequency shifts with a prescribed *** existence of arbitrary dual-point doppler shifts enables the one-time direct identification of rotating axis orientations,which is fundamentally inaccessible in single-point *** robust detection technique is compatible with generalised synthetic OAM light fields by utilising optical modal *** with traditional approaches,our DNRDE-driven detection approach exhibits a four-fold enhancement in measurement speed,higher energy efficiency,and superior accuracy with a maximal absolute measurement error of 2.23°.The proposed dual-point detection method holds great promise for detecting rotating bodies in various applications,such as astronomical surveys and industrial manufacturing.

关键词： rotational doppler effect Rotating axis orientations Real-time detection Orbital angular momentum Optical vortices

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Symmetry detection of rotating patterns based on rotational doppler effect of light

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Chinese Optics Letters 2022年第12期20卷 50-55页

作者： Fang Han Weijie Wang Tong Liu Yuan Ren Zhengliang Liu Song Qiu Department of Aerospace Science and Technology Space Engineering UniversityBeijing 101416China Basic Ministry Space Engineering UniversityBeijing 101416China Laboratory of Quantum Detection&Awareness Space Engineering UniversityBeijing 101416China

We propose a method for detecting the symmetry of rotating patterns based on the rotational doppler effect(RDE)of *** basic mechanisms of the RDE are introduced,and the spiral harmonic distribution of rotating patterns is *** irradiating the rotating pattern using a superimposed optical vortex and analyzing the amplitude of the RDE signal,the spiral harmonic distribution of the pattern can be measured,and then its symmetry can be *** demonstrate this method experimentally by using patterns with different symmetries and *** the method does not need to receive the scattered light completely and accurately,it promises potential application in detecting symmetrical rotating objects at a long distance.

关键词： rotational doppler effect optical vortex spiral harmonic distribution symmetry detection detection of rotating objects

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Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational doppler effect

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Light(Science & Applications) 2016年第1期5卷 88-95页

作者： Hai-Long Zhou Dong-Zhi Fu Jian-Ji Dong Pei Zhang Dong-Xu Chen Xin-Lun Cai Fu-Li Li Xin-Liang Zhang Wuhan National Laboratory for Optoelectronics School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory for Quantum Information and Quantum Optoelectronic Devices Shaanxi ProvinceDepartment of Applied PhysicsXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Optoelectronic Materials and Technologies and School of Physics and Engineering Sun Yatsen UniversityGuangzhou 510275China

The ability to measure the orbital angular momentum(OAM)distribution of vortex light is essential for OAM *** there have been many studies on the measurement of OAM modes,it is difficult to quantitatively and instantaneously measure the power distribution among different OAM modes,let alone measure the phase distribution among *** this work,we propose an OAM complex spectrum analyzer that enables simultaneous measurements of the power and phase distributions of OAM modes by employing the rotational doppler *** original OAM mode distribution is mapped to an electrical spectrum of beat signals using a *** power and phase distributions of superimposed OAM beams are successfully retrieved by analyzing the electrical *** also extend the measurement technique to other spatial modes,such as linear polarization *** results represent a new landmark in spatial mode analysis and show great potential for applications in OAM-based systems and optical communication systems with mode-division multiplexing.

关键词： mode analysis orbital angular momentum rotational doppler effect

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