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A Heliocentric-orbiting Objects Processing System (HOPS) for the Wide Field Survey Telescope: Architecture, Processing Workflow, and Preliminary Results

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arXiv 2025年

作者： Wang, Shao-Han Fu, Bing-Xue Lu, Jun-Qiang Fan, LuLu Cai, Min-Xuan Xu, Ze-Lin Kong, Xu Zhao, Haibin Li, Bin Liu, Ya-Ting Zhu, Qing-Feng Zhou, Xu Wan, Zhen Cheng, Jingquan Jiang, Ji-An Li, Feng Liang, Ming Liu, Hao Luo, Wentao Lou, Zhen Wang, Hairen Wang, Jian Wang, Tinggui Xue, Yongquan Zhang, Hongfei Zhao, Wen Department of Astronomy University of Science and Technology of China Hefei230026 China School of Astronomy and Space Science University of Science and Technology of China Hefei230026 China Deep Space Exploration Laboratory Hefei230088 China Purple Mountain Observatory Chinese Academy of Sciences Nanjing210023 China School of Artificial Intelligence and Data Science University of Science and Technology of China Hefei230026 China Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei230026 China National Optical Astronomy Observatory NSF’s National Optical-Infrared Astronomy Research Laboratory 950 N Cherry Ave. TucsonAZ85726 United States

Wide-field surveys have markedly enhanced the discovery and study of solar system objects (SSOs). The 2.5-meter Wide Field Survey Telescope (WFST) represents the foremost facility dedicated to optical time-domain surveys in the northern hemisphere. To fully exploit WFST’s capabilities for SSO detection, we have developed a heliocentric-orbiting objects processing system (HOPS) tailored for identifying these objects. This system integrates HelioLinC3D, an algorithm well suited for the WFST survey cadence, characterized by revisiting the same sky field twice on the majority of nights. In this paper, we outline the architecture and processing flow of our SSO processing system. The application of the system to the WFST pilot survey data collected between March and May 2024 demonstrates exceptional performance in terms of both temporal efficiency and completeness. A total of 658,489 observations encompassing 38,520 known asteroids have been documented, and 241 newly discovered asteroids have been assigned provisional designations. In particular, 27% of these new discoveries were achieved using merely two observations per night on three nights. The preliminary results not only illuminate the effectiveness of integrating HelioLinC3D within the SSO processing system, but also emphasize the considerable potential contributions of WFST to the field of solar system science. © 2025, CC BY-NC-ND.

关键词： Asteroids

Polychromatic full-polarization control in mid-infrared light

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Light(science & Applications) 2023年第5期12卷 894-904页

作者： Jin Chen Feilong Yu Xingsi Liu Yanjun Bao Rongsheng Chen Zengyue Zhao Jiuxu Wang Xiuxia Wang Wen Liu Yuzhi Shi Cheng-Wei Qiu Xiaoshuang Chen Wei Lu Guanhai Li State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of Sciences500 Yu Tian RoadShanghai 200083China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesNo.1 SubLane XiangshanHangzhou 310024China Shanghai Research Center for Quantum Sciences 99 Xiupu RoadShanghai 201315China University of Chinese Academy of Science No.19 Yuquan RoadBeijing 100049China Department of Electrical and Computer Engineering National University of Singapore4 Engineering Drive 3Singapore 117583Singapore Institute of Nanophotonics Jinan UniversityGuangzhou 511443China Center for Micro-and Nanoscale Research and Fabrication University of Science and Technology of ChinaHefei 230026China Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China National University of Singapore Suzhou Research Institute No.377 Linquan StreetSuzhouJiangsu 215123China

Objects with different shapes,materials and temperatures can emit distinct polarizations and spectral information in mid-infrared band,which provides a unique signature in the transparent window for object ***,the crosstalk among various polarization and wavelength channels prevents from accurate mid-infrared detections at high signal-to-noise ***,we report full-polarization metasurfaces to break the inherent eigen-polarization constraint over the wavelengths in *** recipe enables to select arbitrary orthogonal polarization basis at individual wavelength independently,therefore alleviating the crosstalk and efficiency degradation.A six-channel all-silicon metasurface is specifically presented to project focused mid-infrared light to distinct positions at three wavelengths,each with a pair of arbitrarily chosen orthogonal *** isolation ratio of 117 between neighboring polarization channels is experimentally recorded,exhibiting detection sensitivity one order of magnitude higher than existing infrared ***,the high aspect ratio~30 of our meta-structures manufactured by deep silicon etching technology at temperature−150℃ guarantees the large and precise phase dispersion control over a broadband from 3 to 4.5μ*** believe our results would benefit the noise-immune mid-infrared detections in remote sensing and space-to-ground communications.

关键词： polarization light noise

Normal Dispersion Fiber-based Nonlinear Pulse Compressor for Generating 2-μm Watt-scale, ~100-MHz, Few-cycle Laser Pulse

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Normal Dispersion Fiber-based Nonlinear Pulse Compressor for...

Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Tianli Feng Jingcheng Shang Shengzhi Zhao Yizhou Liu Kejian Yang Chun Wang Tao Li School of Information Science and Engineering Shandong Provincial Key Laboratory of Laser Technology and Application China Key Laboratory of Laser & Infrared System (Ministry of Education) Shandong University Qingdao China Institute of Novel Semiconductors State Key Laboratory of Crystal Materials Shandong University Jinan China

We firstly perform the nonlinear pulse compression for a 2-μm, 101.4-MHz driving laser pulse by splicing normal dispersion fiber (NDF). With the assistance of dispersion compensation of chirped mirror pair, a 28.3-fs (4.2-cycle) compressed pulse, which is 16 times narrower than the 450-fs driving pulse, is realized. The output average power of >1 W creates a new record for the fiber-based nonlinear pulse compressors with such high pulse repetition in the short-mid infrared wavelength region.

关键词： Optical fibers Splicing Power lasers Optical pulse compression Optical fiber communication Compressors Ultrafast optics

Control of the magnon-polariton hybridization with a microwave pump

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arXiv 2023年

作者： Zhang, C. Rao, Jinwei Wang, C.Y. Chen, Z.J. Zhao, K.X. Yao, Bimu Xu, Xu-Guang Lu, Wei School of Physical Science and Technology ShanghaiTech University Shanghai201210 China Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China

Pump-induced magnon modes (PIMs) are recently discovered elementary excitations in ferrimagnets that offer significant tunability to spin dynamics. Here, we investigate the coupling between a PIM and cavity magnon polaritons (CMPs) by driving a cavity magnonic system away from equilibrium with a microwave pump. In our experiment, the Walker mode simultaneously couples with the PIM and cavity photons and thus combines two strongly coherent coupling processes in a single cavity structure. Such a PIM-CMP hybridization system acquires complementary properties from both the PIM and CMPs, allowing it to be freely manipulated by the magnetic field, the pump power and the pump frequency. These coherent manipulations exhibit unique behaviors beyond the intrinsic properties limited by the material nature and electromagnetic boundary conditions, thereby creating opportunities for extending the control of hybrid devices. © 2023, CC BY.

关键词： Photons

A high-efficiency 240 W-level thin-rod Yb:YAG amplifier with dual-wavelength pumping method

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A high-efficiency 240 W-level thin-rod Yb:YAG amplifier with...

Conference on Lasers and Electro-Optics (CLEO)

作者： Shang Wang Zhaojun Liu Zhenhua Cong Xingyu Zhang Zhigang Zhao Key Laboratory of Laser & Infrared System Ministry of Education Shandong University Qingdao China School of Information Science and Engineering Shandong University Qingdao China Shandong Provincial Key Laboratory of Laser Technology and Application Shandong University Qingdao China

A high-efficiency 240 W-level ultrashort pulse laser amplifier based on thin-rod Yb:YAG was obtained by adopting a dual-wavelength (940 nm and 969 nm) pumping method, along with a power extraction efficiency of ~51%.

ISBN: (数字)9781957171050

ISBN: (纸本)9781665466660

关键词： Power lasers Lasers and electrooptics Laser excitation Optical pulse generation Electrooptical waveguides Pump lasers

High-frequency enhanced response based on Sb_(2)Te_(3)topological insulators

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Photonics Research 2022年第10期10卷 2302-2308页

作者： SHI ZHANG CHAOFAN SHI WEIWEI TANG LIBO ZHANG LI HAN CHENGSEN YANG ZHENGYANG ZHANG JIAN WANG MIAO CAI GUANHAI LI CHANGLONG LIU LIN WANG XIAOSHUANG CHEN WEI LU College of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China Department of Optoelectronic Science and Engineering Donghua UniversityShanghai 201620China Terahertz Technology Innovation Research Institute Shanghai Key Laboratory of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China

Topological insulators represent a new quantum phase of matter with spin-polarized surface states that are protected from backscattering, exhibiting electronic responses to light, such as topological quantum phase transitions. However, the effects of high-frequency driving topological intrinsic systems have remained largely unexplored challenges experimentally for high-sensitivity terahertz detection. In this study, by integrating Sb2Te3 topological insulators with subwavelength metal antennas through micro-nano processing, a high-frequency terahertz detector with high sensitivity is proposed. The enhanced response originates from the asymmetric scattering of the surface electrons in the Sb_(2)Te_(3) flakes induced by the terahertz wave. The device displays room-temperature photodetection with a responsivity of 192 mA/W and equivalent noise power of less than 0.35 nW/Hz^(1/2) in the frequency range from 0.02 to 0.3 THz. These results pave the way for the exploitation of topological insulators for high-frequency operation in real-time imaging within long-wavelength optoelectronics.

关键词： scattering insulator quantum

Time-Varying Strong Coupling and Its Induced Time Diffraction of Magnon Modes

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arXiv 2024年

作者： Rao, Jinwei Wang, Yi-Pu Chen, Zhijian Yao, Bimu Zhao, Kaixin Wei, Chunke Wang, Congyi Li, Runze Bai, Lihui Lu, Wei School of Physical Science and Technology ShanghaiTech University Shanghai201210 China School of Physics Shandong University No. 27 Shandanan Road Jinan250100 China State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China Zhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control School of Physics Zhejiang University Hangzhou310027 China

Time-varying media break the temporal translation symmetry of wave propagation in materials, enabling advanced wave manipulations. However, this novel phenomenon has been rarely explored in magnonic systems due to the significant challenge of achieving a sudden and prominent change in magnon dispersion within materials. Here, we construct a time-varying strong coupling between two magnon modes, and observe a change in the beats of Rabi-like oscillations near the pulse edges. Using a frequency-comb spectroscopy technique developed in this work, we characterize the frequency conversion of magnon modes induced by the time-varying strong-coupling effect. Moreover, we construct time slits with adjacent time interfaces and demonstrate, for the first time, the double-slit time diffraction of magnon modes, analogous to the well-known Young’s double-slit experiment. These findings rely solely on the time-varying strong magnon coupling, independent of device reconfiguration. Our results open avenues for applications such as all-magnetic mixers or on-chip GHz sources. © 2024, CC BY-NC-ND.

关键词： Wave propagation

Dissipative Soliton Resonance and Noise-Like Pulse in a Self-Pulsing Fiber Laser

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SSRN

SSRN 2022年

作者： Ma, Xiaoran Feng, Tianli Zhao, Shengzhi Liu, Yizhou Wang, Chun Shang, Jingcheng Hu, Ping Mao, Jiajia Yang, Kejian Li, Tao China Key Laboratory of Laser & Infrared System Ministry of Education Shandong Provincial Key Laboratory of Laser Technology and Application School of Information Science and Engineering Shandong University Qingdao266237 China Institute of Novel Semiconductors State Key Laboratory of Crystal Materials Shandong University Jinan250100 China

In this paper, a self-pulsing Er-doped fiber laser operating in the dissipative soliton resonance (DSR) regime is firstly reported. By adjusting the pumping power and intracavity pulse polarization, the generated mode-locking pulse could evolve between soliton pulse, dissipative soliton resonance pulse and noise-like pulse (NLP). In the dissipative soliton resonance mode-locking regime, the generated rectangular-shaped pulses centered at 1570.5 nm with a maximum average output power of 20.6 mW and a pulse duration of 8.9 ns. The self-pulsing evolving dynamics can be analyzed using weak NPR effect by simultaneously considering the polarization dependent loss from the polarization controller and the reabsorption loss of the un-pumped gain fiber. © 2022, The Authors. All rights reserved.

关键词： Fiber lasers

Density-wave-like gap evolution in La3Ni2O7 under high pressure revealed by ultrafast optical spectroscopy

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arXiv 2024年

作者： Meng, Yanghao Yang, Yi Sun, Hualei Zhang, Sasa Luo, Jianlin Chen, Liucheng Ma, Xiaoli Wang, Meng Hong, Fang Wang, Xinbo Yu, Xiaohui Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100190 China Key Laboratory of Education Ministry Laser and Infrared System Integration Technology Shandong University Qingdao266237 China School of Science Sun Yat-sen University Shenzhen518107 China School of Information Science and Engineering Shandong University Qingdao266237 China Songshan Lake Materials Laboratory Guangdong Dongguan523808 China Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices School of Physics Sun Yat-Sen University Guangzhou China

Density wave (DW) order is believed to be correlated with superconductivity in the recently discovered high-temperature superconductor La3Ni2O7. However, experimental investigations of its evolution under high pressure are still lacking. Here, we explore the quasiparticle dynamics in bilayer nickelate La3Ni2O7 single crystals using ultrafast optical pump-probe spectroscopy under high pressures up to 34.2 GPa. At ambient pressure, the temperature-dependent relaxation dynamics demonstrate a phonon bottleneck effect due to the opening of an energy gap around 151 K. The energy scale of the DW-like gap is determined to be 66 meV by the Rothwarf-Taylor model. Combined with recent experiential results, we propose that this DW-like transition at ambient pressure and low temperature is spin density wave (SDW). With increasing pressure, this SDW order is significantly suppressed up to 13.3 GPa before it completely disappears around 26 GPa. Remarkably, at pressures above 29.4 GPa, we observe the emergence of another DW-like order with a transition temperature of approximately 135 K, which is probably related to the predicted charge density wave (CDW) order. Our study provides the experimental evidence of the evolution of the DW-like gap under high pressure, offering critical insights into the correlation between DW order and superconductivity in La3Ni2O7. Copyright © 2024, The Authors. All rights reserved.

关键词： High temperature superconductors