2024

• Record 229 of
  
  Title:Artificial potential field-empowered dynamic holographic optical tweezers for particle-array assembly and transformation
  
  Author Full Names:Li, Xing(1,2); Yang, Yanlong(1); Yan, Shaohui(1); Gao, Wenyu(1,2); Zhou, Yuan(1,2); Yu, Xianghua(1); Bai, Chen(1); Dan, Dan(1); Xu, Xiaohao(1); Yao, Baoli(1,2)

  Source Title:PhotoniX

  Language:English

  Document Type:Journal article (JA)

  Abstract:Owing to the ability to parallel manipulate micro-objects, dynamic holographic optical tweezers (HOTs) are widely used for assembly and patterning of particles or cells. However, for simultaneous control of large-scale targets, potential collisions could lead to defects in the formed patterns. Herein we introduce the artificial potential field (APF) to develop dynamic HOTs that enable collision-avoidance micro-manipulation. By eliminating collision risks among particles, this method can maximize the degree of parallelism in multi-particle transport, and it permits the implementation of the Hungarian algorithm for matching the particles with their target sites in a minimal pathway. In proof-of-concept experiments, we employ APF-empowered dynamic HOTs to achieve direct assembly of a defect-free 8 × 8 array of microbeads, which starts from random initial positions. We further demonstrate successive flexible transformations of a 7 × 7 microbead array, by regulating its tilt angle and inter-particle spacing distances with a minimalist path. We anticipate that the proposed method will become a versatile tool to open up new possibilities for parallel optical micromanipulation tasks in a variety of fields. © The Author(s) 2024.

  Affiliations:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

  Publication Year:2024

  Volume:5

  Issue:1

  Article Number:32

  DOI Link:10.1186/s43074-024-00144-5

  数据库ID（收录号）:20244217226084
• Record 230 of
  
  Title:Efficient and high-spatiotemporal-quality terawatt-class mid-infrared optical parametric amplifiers by spatially shaped pumping
  
  Author Full Names:Liu, Xin(1,2); Li, Jinhui(1,2); Zhen, Qiwen(1,2); Liu, Keyang(1,2); Wang, Yishan(1,2); Zhao, Wei(1,2); Cao, Huabao(1,2); Fu, Yuxi(1,2)

  Source Title:Journal of the Optical Society of America B: Optical Physics

  Language:English

  Document Type:Journal article (JA)

  Abstract:We propose a method to efficiently generate terawatt (TW)-class mid-infrared (MIR) femtosecond laser pulses with high spatiotemporal quality through optical parametric chirped-pulse amplification (OPCPA). By transforming the pump-beam profile for the OPCPA from Gaussian to flat-top using a designed field mapping optics consisting of two aspherical lenses, we obtain a TW-class femtosecond laser pulse at 2 µm with a conversion efficiency of over 36% according to our simulations. Furthermore, the spatiotemporal coupling effects are greatly suppressed in our method compared to an OPCPA system that is pumped by a widely employed Gaussian profile beam. Our work provides a simple and robust method for developing OPCPA systems with high efficiency and high pulse quality. © 2024 Optica Publishing Group © 2024 Optica Publishing Group (formerly OSA). All rights reserved.

  Affiliations:(1) Center for Attosecond Science and Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

  Publication Year:2024

  Volume:41

  Issue:2

  Start Page:364-372

  DOI Link:10.1364/JOSAB.509609

  数据库ID（收录号）:20240915655165
• Record 231 of
  
  Title:Digital Twin System for Reflector Antenna Structure Performance Evaluation Based on Surrogate Model
  
  Author Full Names:Cui, Hanwei(1); Xiang, Binbin(1); Wang, Wei(2); Lian, Peiyuan(2); Zhou, Jianping(1); Lin, Shangmin(3)

  Source Title:2024 IEEE 7th International Conference on Electronic Information and Communication Technology, ICEICT 2024

  Language:English

  Document Type:Conference article (CA)

  Conference Title:7th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2024

  Conference Date:July 31, 2024 - August 2, 2024

  Conference Location:Xi'an, China

  Abstract:The digital twin system of the reflector antenna based on the surrogate model is designed in this paper to achieve real-time evaluation of its structural performance during operation. Firstly, the finite element model of the reflector antenna is established, and mechanical performance data samples of the antenna structure are obtained. Secondly, using surrogate model technology, a high-precision Gaussian Process mathematical model is fitted to enable rapid and accurate prediction of the antenna structure's performance. Finally, data communication technology is utilized to connect the physical space of the antenna with its twin space, enabling visualization of its structure's performance and interaction with motion attitude based on the Unity engine. Through testing, it has been demonstrated that this digital twin system can achieve real-time monitoring of high precision and efficiency for the structural performance of the antenna. © 2024 IEEE.

  Affiliations:(1) Xinjiang University, School of Mechanical Engineering, Urumqi, China; (2) Xidian University, School of Mechano-Electronic Engineering, Xi'an, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Space Optics Technology Department, Xi'an, China

  Publication Year:2024

  Start Page:263-266

  DOI Link:10.1109/ICEICT61637.2024.10671104

  数据库ID（收录号）:20244117164549
• Record 232 of
  
  Title:Experimental study of pool boiling heat transfer on hybrid surface coupled micro-pin-finned
  
  Author Full Names:Song, Gege(1); Ma, Xiang(1); Xu, Pengzhuo(2); Feng, Yali(3); Zhang, Yonghai(1); Wei, Jinjia(1)

  Source Title:International Journal of Heat and Fluid Flow

  Language:English

  Document Type:Journal article (JA)

  Abstract:The performance of identical hydrophilic-hydrophobic coupled micro-pin-finned surfaces was evaluated using FC-72 as the working fluid in pool boiling experiments. Three hydrophilic and hydrophobic coupled rectangular copper column surfaces (HH4, HH9, and HH16) were constructed to analyze their boiling heat transfer properties. By integrating the micro-pin-finned surface (PF) and the smooth surface (SS), the impact of various subcoolings (0 K, 15 K, and 25 K) on the critical heat flux (CHF) was explored. Surface HH16 showed the greatest sensitivity to subcooling effects on CHF, followed by HH9 and HH4, respectively. For HH9, the CHF at ΔTsub = 0 K, 15 K, and 25 K, reached 69.6 W·cm−2, 84.2 W·cm−2, and 93.7 W·cm−2, respectively. In comparison to other surfaces (PF, HH4, HH16), the CHF of HH9 climbs by 19.32 %, 8.75 %, and 10.8 % at saturated boiling, respectively. A high-quality camera captured bubble dynamics during the experiments. The results reveal that the hydrophilic and hydrophobic coupled micro-pin-finned copper surface has a greater critical heat flux (CHF) than the standard rectangular micro-pin-finned surface, although heat transfer performance (HTC) drops marginally (both saturated and subcooled boiling). Visual monitoring demonstrates that these coupled surfaces effectively prevent bubble coalescence during subcooled boiling. Additionally, this novel surface design may serve as an effective strategy to reduce drying and delay the onset of boiling crises. The CHF improvement of the HH9 on SS surface was 313.06 %, significantly higher than the 246.17 % of PF on SS, marking a performance increase of 66.89 %. The influence mechanism of the Lattice width coefficient and the Vapor column spacing coefficient on CHF were analyzed. Fluid replenishment and bubble formation behavior were applied to clarify the strengthened heat transfer and CHF triggering mechanism on the surface of the hydrophilic and hydrophobic coupled rectangular micro-pin-finned copper column surface. © 2024 Elsevier Inc.

  Affiliations:(1) School of Chemical Engineering and Technology, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an; 710049, China; (2) Xi'an Navigation Technology Research Institute, Shannxi, Xi'an; 710068, China; (3) AVIC Jonhon Optronic Technology Co., Ltd., Luoyang; 471003, China

  Publication Year:2024

  Volume:108

  Article Number:109467

  DOI Link:10.1016/j.ijheatfluidflow.2024.109467

  数据库ID（收录号）:20242416255855
• Record 233 of
  
  Title:Multi-prior physics-enhanced neural network enables pixel super-resolution and twin-image-free phase retrieval from single-shot hologram
  
  Author Full Names:Tian, Xuan(1,2); Li, Runze(1); Peng, Tong(1); Xue, Yuge(1,2); Min, Junwei(1); Li, Xing(1); Bai, Chen(1,2); Yao, Baoli(1,2)

  Source Title:Opto-Electronic Advances

  Language:English

  Document Type:Journal article (JA)

  Abstract:Digital in-line holographic microscopy (DIHM) is a widely used interference technique for real-time reconstruction of living cells’ morphological information with large space-bandwidth product and compact setup. However, the need for a larger pixel size of detector to improve imaging photosensitivity, field-of-view, and signal-to-noise ratio often leads to the loss of sub-pixel information and limited pixel resolution. Additionally, the twin-image appearing in the reconstruction severely degrades the quality of the reconstructed image. The deep learning (DL) approach has emerged as a powerful tool for phase retrieval in DIHM, effectively addressing these challenges. However, most DL-based strategies are data-driven or end-to-end net approaches, suffering from excessive data dependency and limited generalization ability. Here-in, a novel multi-prior physics-enhanced neural network with pixel super-resolution (MPPN-PSR) for phase retrieval of DIHM is proposed. It encapsulates the physical model prior, sparsity prior and deep image prior in an untrained deep neural network. The effectiveness and feasibility of MPPN-PSR are demonstrated by comparing it with other traditional and learning-based phase retrieval methods. With the capabilities of pixel super-resolution, twin-image elimination and high-throughput jointly from a single-shot intensity measurement, the proposed DIHM approach is expected to be widely adopted in biomedical workflow and industrial measurement. © The Author(s) 2024.

  Affiliations:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

  Publication Year:2024

  Volume:7

  Issue:9

  Article Number:240060

  DOI Link:10.29026/oea.2024.240060

  数据库ID（收录号）:20244417298824
• Record 234 of
  
  Title:Slicing of large-size single crystals by ultrafast laser with external stress assistance
  
  Author Full Names:Wang, Lifeng(1); Liu, Lili(1,2); Wang, Yinan(1); Li, Xun(1); Li, Chenchen(1); Li, Ming(1)

  Source Title:Chinese Optics Letters

  Language:English

  Document Type:Journal article (JA)

  Abstract:The existing single-crystal slicing techniques result in significant material wastage and elevate the production cost of premium-quality thin slices of crystals. Here we report (for the first time, to our knowledge) an approach for vertical slicing of large-size single-crystal gain materials by ultrafast laser. By employing aberration correction techniques, the optimization of the optical field distribution within the high-refractive-index crystal enables the achievement of a continuous laser-modified layer with a thickness of less than 10 μm, oriented perpendicular to the direction of the laser direction. The compressed focal spot facilitates crack initiation, enabling propagation under external forces, ultimately achieving the successful slicing of a Φ12 mm crystal. The surface roughness of the sliced Yb:YAG is less than 2.5 μm. The results illustrate the potential of low-loss slicing strategy for single-crystal fabrication and pave the way for the future development of thin disk lasers. © 2024 Chinese Optics Letters.

  Affiliations:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

  Publication Year:2024

  Volume:22

  Issue:8

  Article Number:081601

  DOI Link:10.3788/COL202422.081601

  数据库ID（收录号）:20243516933944
• Record 235 of
  
  Title:Selection Method of Risley Prisms Scanning Trajectory Based on Velocity Ratio
  
  Author Full Names:Duan, Linsen(1); Xie, Hongbo(1); Ma, Jun(2); Yang, Lei(1)

  Source Title:Guangxue Xuebao/Acta Optica Sinica

  Language:Chinese

  Document Type:Journal article (JA)

  Abstract:Objective The Risley prism scanning system is a useful supplement to traditional rotating frame and mirror scanning systems. It features a compact structure, low optical loss, excellent dynamic performance, and a large scanning field of view, and has broad application prospects in lidars, laser communication, and laser guidance. In the practical applications of this system, it is important to select the scanning trajectory reasonably, which will directly affect the scanning efficiency of the system and the acquisition probability of the target. When the parameters and relative positions of the Risley prism are determined, the rotation velocity ratio of the Risley prism is variable and controllable to obtain the scanning trajectories of different shapes. We aim to study the relationship between the velocity ratio with the number of scanning points and petals, then summarize the internal rules of the velocity ratio and scanning trajectory, and evaluate the scanning time and coverage rate of the scanning trajectory under different velocity ratios. Therefore, our study has a guiding significance for selecting the scanning trajectory that meets the scanning efficiency requirements. Methods Firstly, the forward problem of the Risley prism is solved by the non-axial ray tracing algorithm, and the scanning trajectories under different velocity ratios can be obtained. Secondly, the number of scanning points is calculated according to the rotation velocity of the Risley prism and sampling interval, and the number of scanning petals is calculated according to the number of minimum points of the distance curve between scanning points and coordinate origin. Then, the velocity ratio is classified according to its absolute value and fractional part, and the formula for calculating the number of scanning petals by the velocity ratio is established. The scanning trajectory rules of the 2-element Risley prism are analyzed, and the scanning time and coverage rate under different velocity ratios are evaluated. Finally, the scanning trajectory of the 3-element Risley prism is regarded as the superposition and cancellation of the scanning trajectory of the 2-element Risley prism, and the scanning time and coverage rate can be evaluated according to the scanning trajectory rules of the 2-element Risley prism. Additionally, the condition for the 3-element Risley prism to obtain a regular symmetry scanning trajectory without a large scanning blind zone is proposed by analyzing the velocity ratio. Results and Discussions The scanning trajectory of 2-element Risley prism has the following rules (Table 1 and Fig. 4). When M is positive, the scanning trajectory is inner petal, and the trajectory is outer petal under negative M. When M is an integer, the scanning time under different velocity ratios is the same, and when M is a decimal, the scanning time under each type of velocity ratio is the same if the number of decimal places is the same. Under the different numbers of decimal places, the larger number of decimal places leads to longer scanning time. Therefore, the number of decimal places should not be too large. For each type of velocity ratio, when M is of the same sign, the larger |M| brings a larger coverage rate. The scanning trajectory of 3-element Risley prism has the following rules (Table 4 and Fig. 10): only when the scanning petals of 2-element Risley prism are doubled (1‒2 times) with the velocity ratio of M1 and M2, and the scanning points are also doubled (1‒2 times), the scanning trajectory of 3-element Risley prism is regular symmetry and has no large scanning blind zone. When M1 and M2 are both positive, the scanning trajectory is inner petal. When M1 and M2 are both negative or different signs, the scanning trajectory is the outer petal. Additionally, the scanning time and coverage rate of the 3-element Risley prism can be evaluated according to the scanning trajectory rules of the 2-element Risley prism. Conclusions As the scanning trajectory of the Risley prism determines the scanning efficiency of the system and the acquisition probability of the target, it is important to study the method of selecting the scanning trajectory by analyzing the velocity ratio. Based on the non-axial ray tracing algorithm, the forward problem of the Risley prism scanning system is solved. Then the petal-shaped scanning trajectories under different velocity ratios are obtained, and the number of scanning points and scanning petals are calculated, which is then adopted to summarize the rules between the scanning trajectory and velocity ratio. The scanning time and coverage rate of the scanning trajectory under different velocity ratios are evaluated. Meanwhile, the condition for the 3-element Risley prism to obtain a regular symmetry scanning trajectory without a large scanning blind zone is proposed. The obtained rules and conclusions can be employed to reasonably determine the velocity ratio in the practical applications of the Risley prism scanning system to select the scanning trajectory that meets the scanning efficiency requirements. However, the scanning trajectory of the Risley prism is sensitive to the velocity ratio, and there will be deviations between the actual and set velocity ratios in the rotation control. Therefore, the influence of such deviations on the scanning trajectory can be further explored. © 2024 Chinese Optical Society. All rights reserved.

  Affiliations:(1) Key Laboratory of Optoelectronics Information Technology, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin; 300072, China; (2) School of Armament Science and Technology, Xi'an Technological University, Shaanxi, Xi'an; 710021, China

  Publication Year:2024

  Volume:44

  Issue:7

  Article Number:0722003

  DOI Link:10.3788/AOS231834

  数据库ID（收录号）:20241815993737
• Record 236 of
  
  Title:Ladybeetle-I: Design of the brightest beacon lamp for LEO micro-satellite
  
  Author Full Names:Mei, Chao(1); Wang, Hua wei(1); Bo, Yi(1); Shi, Kui(1)

  Source Title:Proceedings of SPIE - The International Society for Optical Engineering

  Language:English

  Document Type:Conference article (CA)

  Conference Title:6th Conference on Frontiers in Optical Imaging and Technology: Imaging Detection and Target Recognition

  Conference Date:October 22, 2023 - October 24, 2023

  Conference Location:Nanjing, China

  Conference Sponsor:The Chinese Society for Optical Engineering

  Abstract:As a commercial aerospace education satellite, "Ladybeetle-I" has flashed many times around the world, which has attracted the attention of many astronomers. This manuscript presents the design of the beacon lamp of this satellite. Consider the limitation of low power consumption, small volume and light weight of "Ladybeetle-I", this beacon lamp is designed by the combination of light emitting diode (LED) array structure and total internal reflection (TIR) lens. Firstly, through the analysis of structure parameters, color temperature and working state of LED, the light source of the beacon lamp is realized. Secondly, through the analysis of the requirements parameter of TIR lens, the lens of the beacon lamp is realized. This beacon lamp realizes that the "Ladybeetle-I" in the 547-km LEO can be directly observed by naked eyes within the radius of more than 25 km. Furthermore, the satellite in-orbit test results show that the brightness of the beacon lamp at Sub-Satellite Point is higher than -0.6 magnitude (m) stars. To the best of our knowledge, "Ladybeetle-I", which utilizes this beacon lamp, is the first and only LEO satellite that can be directly observed by naked eye. © 2024 SPIE. All rights reserved.

  Affiliations:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China

  Publication Year:2024

  Volume:13156

  Article Number:131560G

  DOI Link:10.1117/12.3015186

  数据库ID（收录号）:20242016093078
• Record 237 of
  
  Title:Turnkey generation of MIR soliton and NIR second-harmonic microcombs
  
  Author Full Names:Shi, Lei(1,2); Ming, Xianshun(1); Yu, Hengshen(1,2); Ma, Kai(1); Sun, Qibing(1,2); Wang, Leiran(1,2); Zhao, Wei(1,2); Zhang, Wenfu(1,2)

  Source Title:Optics Express

  Language:English

  Document Type:Journal article (JA)

  Abstract:Mid-infrared (MIR) microcombs exhibit remarkable advantages for trace molecule detection, facilitating fast and precise spectral analysis. However, due to limitations in tunability and size of available MIR pump sources, it is difficult to achieve compact MIR mode-locked microcombs using traditional methods. Here, we propose the turnkey generation of MIR soliton and near-infrared second-harmonic microcombs in a single microresonator. The self-starting method based on self-injection locking eliminates the complex tuning process and is compatible with modular packaged MIR distributed-feedback lasers. By simultaneously leveraging second- and third-order nonlinearities, frequency up-conversion can be achieved without relying on external nonlinear media, facilitating the integration of f-2f self-referencing. Additionally, the direct turnkey generation of breathing solitons and two-soliton states has been achieved. Meanwhile, a new method is proposed that allows for quickly switching between different soliton states by simply changing the pump power. We provide operational guidelines and explain its operating mechanism. Dynamical analysis shows that the detuning automatically converges to the red detuning region corresponding to the target soliton state. Our work provides a full-system miniaturized mode-locking scheme for MIR microcombs and offers new potential for fast switching of soliton states and self-referencing of single-resonator. © 2024 Optica Publishing Group (formerly OSA). All rights reserved.

  Affiliations:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

  Publication Year:2024

  Volume:32

  Issue:22

  Start Page:39860-39872

  DOI Link:10.1364/OE.535316

  数据库ID（收录号）:20244417298034
• Record 238 of
  
  Title:Particle delivery in generalized optical vortex conveyor belts with a uniform orbital flow
  
  Author Full Names:Gao, Wenyu(1,2); Zhou, Yuan(1,2); Li, Xing(1,2); Zhang, Yanan(1,2); Zhang, Qiang(1,2); Li, Manman(1); Yu, Xianghua(1); Yan, Shaohui(1); Xu, Xiaohao(1,2); Yao, Baoli(1,2)

  Source Title:Photonics Research

  Language:English

  Document Type:Journal article (JA)

  Abstract:Perfect optical vortex (POV) beams offer a phase-gradient route to convey small particles along a tunable circular path or belt. The prevailing generalized POV method can be used to reshape the conveyor belt, but it usually deteriorates the orbital energy flow of field, leading to unstable conveying speed or even creating unwanted optical traps that prevent transportation. Here, we demonstrate optical conveyor belts with customized profiles and a uniform orbital flow over the whole transporting region by integrating isometric uniform sampling and random phases into the generalized POV generation algorithm. Smooth delivery of metallic particles, inaccessible to conventional generalized POV methods, is achieved at an almost even speed. We also demonstrate a dual-belt conveyor for delivering large metal microparticles, which experience repulsive intensity-gradient forces and thus are unable to be manipulated by a single belt. Our results present a unique addition to the toolbox of optical manipulation and would facilitate the development of small-scale drug delivery microsystems. © 2024 Chinese Laser Press.

  Affiliations:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

  Publication Year:2024

  Volume:12

  Issue:12

  Start Page:2881-2890

  DOI Link:10.1364/PRJ.539718

  数据库ID（收录号）:20245017500626
• Record 239 of
  
  Title:Single-pixel imaging based on self-supervised conditional mask classifier-free guidance
  
  Author Full Names:Li, Qianxi(1,2); Yan, Qiurong(3); Dong, Jiawei(1,2); Feng, Jia(1); Wu, Jiaxin(1,2); Cao, Jianzhong(1); Liu, Guangsen(1); Wang, Hao(1)

  Source Title:Optics Express

  Language:English

  Document Type:Journal article (JA)

  Abstract:Reconstructing high-quality images at a low measurement rate is a pivotal objective of Single-Pixel Imaging (SPI). Currently, deep learning methods achieve this by optimizing the loss between the target image and the original image, thereby constraining the potential of low measurement values. We employ conditional probability to ameliorate this, introducing the classifier-free guidance model (CFG) for enhanced reconstruction. We propose a self-supervised conditional masked classifier-free guidance (SCM-CFG) for single-pixel reconstruction. At a 10% measurement rate, SCM-CFG efficiently completed the training task, achieving an average peak signal-to-noise ratio (PSNR) of 26.17 dB on the MNIST dataset. This surpasses other methods of photon imaging and computational ghost imaging. It demonstrates remarkable generalization performance. Moreover, thanks to the outstanding design of the conditional mask in this paper, it can significantly enhance the accuracy of reconstructed images through overlay. SCM-CFG achieved a notable improvement of an average of 7.3 dB in overlay processing, in contrast to only a 1 dB improvement in computational ghost imaging. Subsequent physical experiments validated the effectiveness of SCM-CFG. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

  Affiliations:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Information Engineering, Nanchang University, Nanchang; 330031, China

  Publication Year:2024

  Volume:32

  Issue:11

  Start Page:18771-18789

  DOI Link:10.1364/OE.518455

  数据库ID（收录号）:20242216154637
• Record 240 of
  
  Title:Single-photon ranging lidar based on multi-repetition-rate pulse train correlation and accumulation
  
  Author Full Names:Kang, Yan(1); Wang, Xiaofang(1,2); Zhang, Tongyi(1,2); Zhao, Wei(1,2)

  Source Title:Optics Letters

  Language:English

  Document Type:Journal article (JA)

  Abstract:A single-photon lidar based on multi-repetition-rate pulse train correlation and accumulation is proposed, and a ranging experiment is conducted on a 32 m target. By accumulating the correlation ranging results of pulse trains with internal spacings of 80, 100, and 125 ns, the signal-to-noise ratio of the cross correlation function is improved by about three-fold, which enables our method to improve the ranging precisions by more than 20% compared with the single repetition-rate method, and the shorter the acquisition time, the more obvious the advantage will be. Experimental results show that at an acquisition time of 0.01 s, our method can still achieve a ranging precision of 2.59 cm, while the single repetition-rate method can no longer obtain effective ranging results at this time. This method will be of great significance for realizing high-speed, large-scale unambiguous single-photon lidar ranging. © 2024 Optica Publishing Group.

  Affiliations:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

  Publication Year:2024

  Volume:49

  Issue:6

  Start Page:1628-1631

  DOI Link:10.1364/OL.511411

  数据库ID（收录号）:20241215777230