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8th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Chen, Hai-Xia Zhang, Zi-Hao Kong, Xiao-Ling Sun, Yu-Xin Science and Technology on Electro-Optical Information Security Control Laboratory Airport Economic Zone Tianjin300308 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

An artificial intelligent decision-making system based on Deep Q Network is developed according to the characteristic of the optoelectronic countermeasures for defense. In view of the high complexity of the input state variables of the system, simulation method is used to sift the state variables so as to reduce the input dimension of the network. In addition, simulation method is used to generate enough samples for the network training. Aiming at the adaptability evaluation of the system, evolutionary evaluation index is designed and simulation method is used to evaluate the adaptability of online learning ability of the system. © 2022 SPIE

关键词： Decision making

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Linearized microwave downconversion link based on fast and intelligent impairment equalization for noncooperative systems

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Chinese Optics Letters 2023年第2期21卷 143-147页

作者：陈智宇钟欣蒋林徐嘉鑫刘静娴盘艳周涛 Key Laboratory of Science and Technology on Electronic Information Control Chengdu 610029China Center for Information Photonics&Communications School of Information Science&TechnologySouthwest Jiaotong UniversityChengdu 610031China Science and Technology on Communication Security Laboratory Institute of Southwestern CommunicationChengdu 610041China

We experimentally demonstrated the use of intelligent impairment equalization(IIE)for microwave downconversion link linearization in noncooperative *** an equalizer is realized based on an artificial neural network(ANN).Once the training process is completed,the inverse link transfer function can be *** the inverse transformation for the detected signal after transmission,the third-order intermodulation distortion components are suppressed significantly without requiring any prior information from an input RF ***,fast training speed is achieved,since the configuration of ANN-based equalizer is *** results show that the spurious-free dynamic range of the proposed link is improved to 106.5 dB·Hz^(2/3),which is 11.3 dB higher than that of a link without ***,the training epochs reduce to only five,which has the potential to meet the practical engineering requirement.

关键词： microwave photonics linearized downconversion link intelligent impairment equalization artificial neural network

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Multi-color laser generation in periodically poled KTP crystal with single period

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Chinese Optics Letters 2023年第2期21卷 76-80页

作者：牛素俭周志远程静欣葛正杨琛史保森 CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China Synergetic Innovation Center of Quantum Information&Quantum Physics University of Science and Technology of ChinaHefei 230026China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin 300308China

Frequency conversion based on three-wave mixing is a critical nonlinear optic application,extending the frequency range of existing lasers and realizing frequency-transduced detectors in a wavelength range that lacks an effective *** matching is vital for effective frequency *** advantages of quasi-phase matching(QPM)over birefringent phase matching are a lack of walk-off effect,a maximum nonlinear coefficient,and phase matching in the entire transparency ***,using different types and orders of QPM,four kinds of effective frequency doubling processes are realized in a periodically poled potassium titanyl phosphate(KTP)crystal with a single period,and three kinds of frequency doubling processes are experimentally *** also show a feasible way to construct an RGB color generator based on two different QPM *** study significantly expands the feasible frequency conversion of existing lasers to different wavelengths,providing an effective method for multi-color laser generation based on periodically poled KTP crystals.

关键词： nonlinear optics frequency doubling multi-color laser quasi-phase matching

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Electro-optically Q-switching performance of diode-pumped HoGdVO4 laser

Electro-optically Q-switching performance of diode-pumped Ho...

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2022 Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022

作者： Wu, Jiaze Duan, Xiaoming Ding, Yu Ju, Youlun School of Astronautics Harbin Institute of Technology Harbin150001 China National Key Laboratory of Tunable Laser Technology Harbin Institute of Technology Harbin150001 China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin300308 China

ISBN: (纸本)9781510662476

We proposed a Ho:GdVO4 laser operating at 2.05 µm which was directly in-band dual-end-pumped by a pair of 1.94 μm fiber-coupled laser diodes (LD). A Ho:GdVO4 crystal with doping of 1.0 at.% was used as the gain medium. In continuous-wave (CW) mode, we obtained the maximum output power of 6.5 W at 2047.9 nm with the absorbed pump power of 28 W, corresponding to a slope efficiency of 37.6 %. By using an LGS crystal as the electro-optical Q-switch, the highest peak power of 773.8 kW was obtained at a pulse repetition frequency (PRF) of 1 kHz, corresponding to a maximum pulse energy of 3.25 mJ and a pulse width of 4.2ns. © 2023 SPIE.

关键词： Q switching

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Intention recognition based on Hidden Markov Model for aerial target 13

Intention recognition based on Hidden Markov Model for aeria...

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13th International Conference on Signal Processing Systems, ICSPS 2021

作者： Chai, Huimin Zhang, Yong Song, Yanan School of Computer Science and Technology Xidian University Xi'an China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin300308 China

ISBN: (数字)9781510653184

ISBN: (纸本)9781510653177

The method of intention recognition based on HMM for aerial target is provided in the paper. The three HMMs are constructed in order to recognize the attack intention, evasion intention and escape intention respectively. The "left-right"structure is chosen to establish the HMMs. The target sensor data: target speed-approach angle and distance from enemy target to our side, is utilized as the observation sequence of the HMMs. Here, the discretization results of target sensor data are the input to the HMMs. The accuracy of target intention recognition is over 80.0% in simulation experiments, which show that the method is available and effective. © COPYRIGHT SPIE.

关键词： Hidden Markov models

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Spatiotemporal optical vortices generation in the green and ultraviolet via frequency upconversion[Invited]

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Chinese Optics Letters 2023年第8期21卷 12-16页

作者：高雪晨赵雨薇王珏卢扬张家璇范锦涛胡明列 Ultrafast Laser Laboratory Key Laboratory of Opto-electronic Information Science and Technology of Ministry of EducationSchool of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin 300308China

As a newly discovered type of structured light,a spatiotemporal optical vortex(STOV),which is remarkable for its space–time spiral phase and transverse orbital angular momentum(OAM),has garnered substantial *** previous studies have focused on the generation,characterization,and propagation of STOVs,but their nonlinear frequency conversion remains largely ***,we experimentally demonstrate the generation of green and ultraviolet(UV)STOVs by frequency upconversion of a STOV carried near-infrared(NIR)pulse emitted by a high repetition rate Yb-doped fiber laser amplifier ***,we verify that the topological charge of spatiotemporal OAM(ST-OAM)is doubled along with the optical frequency in the second-harmonic generation(SHG)process,which is visualized by the diffraction patterns of the STOVs in the fundamental and second-harmonic ***,the space–time characteristic of NIR STOV is successfully mapped to UV STOV by sum-frequency mixing STOV at 1037 nm and Gaussian beams in the green ***,we observe the topological charges of the ST-OAM could be degraded owing to strong space–time coupling and complex spatiotemporal astigmatism of such *** results not only deepen our understanding of nonlinear manipulation of STOAM spectra and the generation of STOVs at a new shorter wavelength,but also may promote new applications in both classical and quantum optics.

关键词： ultraviolet spatiotemporal optical vortex second-harmonic generation sum-frequency generation

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Detection of PFCP Protocol Based on Fuzz Method 2

Detection of PFCP Protocol Based on Fuzz Method

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2nd International Conference on Computer, control and Robotics, ICCCR 2022

作者： Cao, Yebei Chen, Yucheng Zhou, Wenan Science and Technology on Communication Information Security Control Laboratory Jiaxing China School of Computer Science Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781665466745

5G as a widely used mobile network, its security is of great significance. PFCP protocol is one of the important protocols that introduced into 5G core network, After the analysis of PFCP protocol and its security threat, this paper profoundly fuzzed the PFCP protocol. In order to improve the efficiency, this paper improves the random Fuzzing test technology, proposes a new data mutation algorithm and frame. By analyzing the test results, we found that the application of the new algorithm made the fuzzing technology greatly improved in terms of efficiency and found security vulnerabilities. © 2022 IEEE.

关键词： Efficiency

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A Latency-offset Online Trajectory Planner based on Successive Convex Approximation

A Latency-offset Online Trajectory Planner based on Successi...

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2022 IEEE International Conference on Unmanned Systems, ICUS 2022

作者： Li, Yiming Jiang, Bin Yang, Junan Wang, Jian Li, Beibei Huang, Keju Shao, Kun College of Electronic Engineering National University of Defense Technology Hefei China Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (数字)9781665484565

ISBN: (纸本)9781665484565

An online trajectory planner permits autonomous unmanned vehicles to maneuver in a changing mission scenario and varying environment. However, in real-time online plannings, task performance, completeness and accuracy is seriously challenged by the latency during mission planning and scheme computation. To address the issue, we propose a latency-correcting online trajectory planner based on successive convex approximation (SCA), which is aiming at offset the latency in the planning. In this work, two types of latency are considered, i.e., a prior known variable and computation, where the latter one poses a problem. With this, we devise an online latency method to predict computing latency by conducting time complexity analysis. The experiment is to design an optimal UAV trajectory to serve the eavesdropping of an uncooperative emitter. The results showed this harmful latency effect, and then demonstrated the improved accuracy and task performance of the proposed planner. © 2022 IEEE.

关键词： Trajectories

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Accelerating High-resolution Image Stitching for the Dual Camera System based on GPU

Accelerating High-resolution Image Stitching for the Dual Ca...

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2022 Chinese Automation Congress, CAC 2022

作者： Wang, Jingsi Liu, Dong Zheng, Ran Hu, Yongcai Gao, Wu Zhao, Chen Northwestern Polytechnical University School of Computer Science Xi'an China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin China

ISBN: (纸本)9781665465335

Image stitching plays an important role in the field of computer vision and image processing. Although some sophisticated stitching methods have been proposed, they are usually time-consuming. Because many application scenarios, such as video surveillance, need quick image stitching to provide a wide field of view, accelerating the image stitching is critical. In recent years, the neural network is used to stitching images, but only relatively small size images can be processed;meanwhile, time-consuming image stitching is also unavoidable. In this paper, to quickly stitch 1920×1080 images generated by the dual camera system, an image stitching algorithm is proposed. We divided the algorithm depending on its timeliness on different steps, and its time-consuming steps are parallelized on Graphics Processing Unit (GPU) platforms to be accelerated. We tested different hierarchies for organization of threads and access of memory on compute unified device architecture (CUDA) programming, and the final experiment results showed that our algorithm could reach a speedup ratio up to 119x on the Desktop with 3080ti. © 2022 IEEE.

关键词： Graphics processing unit

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A Robust and Scalable One-PUF-to-Many Authentication and Key Agreement Scheme for Mobile Communication Network

A Robust and Scalable One-PUF-to-Many Authentication and Key...

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2023 International Conference on Networking and Network Applications, NaNA 2023

作者： Wang, Yiteng Ren, Zhe Wang, Wei School of Cyber Engineering Xidian University Xi'an China The 36th Research Institute of China Electronics Technology Group Corporation Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (纸本)9798350327380

Under the multi-cloud environment of mobile communication networks, unattended terminals would possibly be involved in different tasks. For the network security, terminals should be authenticated by cloud service providers (CSPs) before being involved in various tasks. As a new cryptology primitive, Physical Unclonable Function (PUF) can be served as a trusted root for unattended terminals and provide security property against physical attacks, based on which physical secure authentication can be executed. However, applying the PUF directly to the multi-cloud environment caused the authentication scheme to rely on the storage of the primitive challenge-response pairs, and there was a single point of failure problem. To solve these issues, we propose an authentication and key agreement scheme named RSOPM for secure authentication between terminals and CSPs. Specifically, mutual authentication without the storage of the primitive challenge-response pairs on the cloud is enabled by exploiting the trapdoor collision property of the chameleon hash function. Moreover, the redactable blockchain containing distributed registration information makes a terminal register only once, and then the terminal gains access to the various CSPs. The security properties are discussed to show our scheme resists various attacks. The results of experiments show that the overall delay is reduced by 33 % compared to other multi-cloud authentication schemes. © 2023 IEEE.

关键词： Authentication

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