作者机构：
[文兵; 邓杨保; 张赛文; 陈德鹏; 邓曙光; 张光富] All-solid-state Energy Storage Materials and Devices Key Laboratory of Hunan Province, College of Information and Electronic Engineering, Hunan City University, Yiyang;413000, China;[韦家谋] Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha;410082, China;[文兵] 413000, China <&wdkj&> Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha
通讯机构：
[Deng, Y.] A;All-solid-state Energy Storage Materials and Devices Key Laboratory of Hunan Province, China
关键词：
cosh-Airy脉冲;双零色散介质;超连续谱;操控
摘要：
结合分步傅里叶方法和四阶Runge-Kutta积分法，研究了有限能量cosh-Airy脉冲在双零色散介质中的超连续谱产生与操控。首先，详细讨论了特征参数截断系数a、初始啁啾C和分布因子χ0对cosh-Airy脉冲在双零色散介质中的演化影响，并统计了a、C和χ0对超连续谱宽度的影响。然后，进一步研究了高阶非线性效应对cosh-Airy脉冲产生超连续谱的影响。结果表明：通过操控cosh-Airy脉冲的特征参数可以控制超连续谱的宽度；当存在高阶非线性效应时，超连续谱的平坦性会受到影响。研究结果为超连续谱的产生和操控以及宽带激光光源提供一些理论基础。 Combining the split-step Fourier method with the fourth-order Runge-Kutta integration method, the manipulation and generation of supercontinuum by finite energy cosh-Airy pulses in a double-zero dispersion media was investigated. Firstly, the influences of truncation coefficient a, initial chirp C and distribution factor χ0 on the evolution of cosh-Airy pulses in double-zero dispersion medium were discussed in detail, and the influences of a, C and χ0 on the width of supercontinuum width were statistically analyzed. Then, the influences of higher-order nonlinear effects on supercontinuum generation of cosh-Airy pulse was further studied. The results show that the width of supercontinuum can be controlled by manipulating the characteristic parameters of cosh-Airy pulses. The flatness of supercontinuum is affected with consideration of high-order nonlinear effects. The results provide some theoretical basis for manipulation and generation of supercontinuum and broadband laser sources.
作者机构：
[文兵; 邓杨保; 张赛文; 邓曙光; 张光富] All-Solid-State Energy Storage Materials and Devices Key Laboratory of Hunan Province, College of Information and Electronic Engineering, Hunan City University, Yiyang;413002, China;[韦家谋] Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha;410082, China;[文兵] 413002, China <&wdkj&> Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha
通讯机构：
[Deng, Y.] A;All-Solid-State Energy Storage Materials and Devices Key Laboratory of Hunan Province, China
关键词：
Airy光束;PT对称;脱落孤子;演化
摘要：
利用分步傅里叶方法，研究了PT对称介质中Airy光束的演化特性，并从截断系数、调制深度、调制宽度三个参数，研究了其对Airy光束所脱落出的孤子的传输特性的影响。研究结果发现：Airy光束在PT对称介质中传输时，在主峰位置处脱落出一个周期性变化的孤子并且孤子波形会产生一个横向位置的偏移；另外发现，截断系数a越小、调制深度P和调制因子w越大，Airy光束脱落出的孤子的峰均比越大，产生的光束干扰和光束畸变越大，阻碍光纤通信；调制深度P越小、调制因子w越大，Airy光束脱落出的孤子的峰值和峰均比出现了明显的跳跃，传输的稳定性减小，但是脱落出的孤子依然能够稳定地长距离传输。 The evolution characteristics of an Airy beam in PT symmetric medium by using split-step Fourier method was investigated. Then the impact of truncation width, modulation depth, and modulation width on the propagation properties of soliton generated from an Airy beam was discussed in detail. The results illustrate that when an Airy beam propagates in a PT symmetric medium, a soliton with periodic variation is shedded at the main peak position and a lateral offset is generated. Moreover, it is demonstrated that with decreasing truncation width a, increasing modulation depth P and modulation factor w, the peak-to-average power ratio of a soliton from Airy beam increases, which causes the beam interference and beam distortion become more and more. With decrement of modulation depth P and increment of modulation factor w, the peak intensity and peak-to-average power ratio of a soliton from an Airy beam jump obviously, leading to decreasing propagation stability of a soliton. However, the shedding soliton can still propagates stably in a long distance.
期刊：
OPTICS AND LASER TECHNOLOGY,2019年120:105699 ISSN：0030-3992
通讯作者：
Wen, Bing;Deng, Shuguang
作者机构：
[Zhang, Guangfu; Wen, Bing; Deng, Shuguang; Deng, Yangbao] Hunan City Univ, All Solid State Energy Storage Mat & Devices Key, Coll Informat & Elect Engn, Yiyang 413000, Peoples R China.;[Wen, Bing; Fu, Xiquan] Hunan Univ, Key Lab Micro Nanooptoelect Devices, Minist Educ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Wen, B; Deng, SG] H;Hunan City Univ, All Solid State Energy Storage Mat & Devices Key, Coll Informat & Elect Engn, Yiyang 413000, Peoples R China.
关键词：
Blue shift;Method of moments;Optical pumping;Solitons;Asymmetric oscillations;Evolution;High-order;Intrapulse Raman scattering;Nonlinear propagation;Spectral evolution;Spectrum structure;Third order dispersion;Red Shift
作者：
Guangfu Zhang;Ye Tian;Yangbao Deng;Dongchu Jiang;Shuguang Deng
期刊：
Journal of Nanotechnology,2018年2018:1-5 ISSN：1687-9503
通讯作者：
Zhang, G.
作者机构：
[Shuguang Deng] Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments, Changsha University of Science and Technology, Changsha 410076, China;[Guangfu Zhang; Ye Tian; Yangbao Deng] School of Communication and Electronic Engineering, Hunan City University, Yiyang 413000, China;[Dongchu Jiang] School of Communication and Electronic Engineering, Hunan City University, Yiyang 413000, China<&wdkj&>Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments, Changsha University of Science and Technology, Changsha 410076, China
通讯机构：
School of Communication and Electronic Engineering, Hunan City University, Yiyang, China
摘要：
In this paper, we theoretically and experimentally investigate the initial temporal characterization and the temporal evolution of a picosecond laser pulse by a synchronized femtosecond laser pulse. After theoretically analyzing the measurement principle, we experimentally measure the initial temporal characterization of the picosecond laser pulse. Further, the temporal evolution of the picosecond laser pulse propagating in different lengths of a carbon disulfide (CS2) is measured. We find that the initial temporal shape of the picosecond laser pulse is smooth and clean. As increasing of the CS2 length, the pulse width of the picosecond laser pulse has a trend of slight narrow owing to the spatiotemporal coupling effect.
摘要：
We focus on the topology control algorithm in Software-Defined Sensor Networks (SDSNs) and propose a robot-assisted sink nodes relocation algorithm based on the Markov chain. Firstly, by using the software-defined architecture, sensor nodes and network topology can be deployed and updated by the controller which provides global network information and centralized management in real time. Then robot-assisted sink nodes are deployed into SDSN to extend the network lifetime. Unlike motionless nodes or random mobile nodes which may bring about unforeseeable network topological variation, robot-assisted sink node can be migrated to specified location by the controller in SDSN. Furthermore, we propose a Markov chain based Robot-assisted Weighted Relocation (MRWR) algorithm to redeploy the sink nodes on the basis of node status and weight. Simulation results and analysis indicate that the proposed algorithm extends network lifetime with lower average power consumption and decreases the average delay from sensor nodes to sink node as compared with that of static network.
作者机构：
[Yan, Feng; Shen, Lianfeng; Ding, Zhaoming] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China.;[Xing, Song] Calif State Univ Los Angeles, Dept Informat Syst, Los Angeles, CA 90032 USA.;[Deng, Shuguang] Hunan City Univ, Coll Commun & Elect Engn, Yiyang 413000, Peoples R China.
会议名称：
9th International Conference on Wireless Communication and Signal Processing (WCSP)
会议时间：
OCT 11-13, 2017
会议地点：
Nanjing, PEOPLES R CHINA
会议主办单位：
[Ding, Zhaoming;Yan, Feng;Shen, Lianfeng] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China.^[Xing, Song] Calif State Univ Los Angeles, Dept Informat Syst, Los Angeles, CA 90032 USA.^[Deng, Shuguang] Hunan City Univ, Coll Commun & Elect Engn, Yiyang 413000, Peoples R China.
会议论文集名称：
International Conference on Wireless Communications and Signal Processing
关键词：
Carrier sensing threshold;link success probability;Poisson point process;dense wireless networks
摘要：
Considering a small-scale fading environment in a dense random wireless network, we investigate the impact of the carrier-sensing threshold on the link performance under the premise of a fixed carrier-sensing range. At first, we assume a close transmitter-receiver distance and model the network nodes as a homogeneous Poisson point process (PPP). Then we present a simple analysis model of the conditional link success probability to establish a correlation between the interference capture and the link success. Subsequently, based on the assumption that the interference among proximity nodes mainly comes from the nearby nodes, we obtain the bounds of the carrier-sensing threshold through stochastic analysis and a simple adaptive algorithm to adjust the carrier-sensing threshold within its bounds is further presented. Numerical results show that the proposed method enables the pending transmitter to adjust the bounds of the carrier-sensing threshold adaptively when the channel path-loss exponent changes and the validity of the proposed adaptive algorithm is verified in the simulations.
期刊：
2016 8TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS & SIGNAL PROCESSING (WCSP),2016年:1-5 ISSN：2325-3746
通讯作者：
Tang, Min
作者机构：
[Yan, Feng; Shen, Lianfeng; Tang, Min; Kuang, Sufeng] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China.;[Deng, Shuguang] Hunan City Univ, Coll Commun & Elect Engn, Yiyang 413000, Peoples R China.;[Xing, Song] Calif State Univ Los Angeles, Dept Informat Syst, Los Angeles, CA 90032 USA.
通讯机构：
[Tang, Min] S;Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China.
会议名称：
8th International Conference on Wireless Communications and Signal Processing (WCSP)
会议时间：
OCT 13-15, 2016
会议地点：
Yangzhou, PEOPLES R CHINA
会议主办单位：
[Tang, Min;Yan, Feng;Shen, Lianfeng;Kuang, Sufeng] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China.^[Deng, Shuguang] Hunan City Univ, Coll Commun & Elect Engn, Yiyang 413000, Peoples R China.^[Xing, Song] Calif State Univ Los Angeles, Dept Informat Syst, Los Angeles, CA 90032 USA.
会议论文集名称：
International Conference on Wireless Communications and Signal Processing
摘要：
In this paper, two coverage optimization algorithms based on Voronoi diagram are proposed to reduce the energy consumption of software-defined sensor networks (SDSNs). In the first algorithm named Minimax Radius Algorithm (MRA), we try to reduce the sensing radii of nodes as much as possible while preserving the original network coverage. In the second algorithm named Sleeping-based Algorithm (SLA), we try to set as many nodes as possible into sleep mode without generating new coverage holes. Simulation results show that both algorithms can reduce the energy consumption significantly and the energy reduction rate increases with nodes' sensing radius and the number of nodes.
作者机构：
[燕锋; 丁兆明; 沈连丰; 朱亚萍] National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China;[邓曙光] College of Communications and Electronics Engineering, Hunan City University, Yiyang, 413000, China
