bluuebunny/crossref_metadata_2025 huggingface dataset:
Medium and large-sized mammals in montane habitats of Oaxaca, México
Authors: Ramírez-Bautista Arturo , Lavariega Mario C.
Published: February 2021

Los inventarios locales constituyen la base para entender la distribución de las especies y los procesos ecológicos e históricos subyacentes.  Esta información, en asociación con la documentación de los motivos de caza de las especies, es necesaria para el diseño de estrategias de conservación.  Este estudio provee datos nuevos de las especies de mamíferos medianos y grandes del Cerro Piedra Larga (CPL), un macizo montañoso interior en Oaxaca, México.  Obtuvimos datos de observaciones directas en transectos, búsqueda de rastros y fototrampeo en bosque tropical caducifolio, bosque seco de pino-encino y en bosque de pino-encino.  Registramos los motivos de caza de los mamíferos por la gente local a través de entrevistas informales.  Cuantificamos el número de especies e identificamos aquellas que están en alguna categoría de riesgo para su conservación.  Reportamos la presencia de 26 especies de mamíferos medianos y grandes en el CPL.  Siete especies están en alguna categoría de riesgo. Los habitantes reconocieron la presencia de 23 especies, de las cuales 14 son cazadas para prevenir daños sobre animales domésticos y cultivos.  Cinco especies son cazadas por su carne.  Las observaciones directas, el fototrampeo y las entrevistas fueron métodos complementarios que ayudaron a tener una mejor lista de las especies. Siete especies constituyen los primeros registros para toda la subprovincia.  El registro de Cuniculus paca representa una extensión de su distribución hacia el centro-sur de Oaxaca.  Considerando a los mamíferos pequeños, los voladores y los medianos y grandes, el CPL tiene el 24.9 % del total de mamíferos terrestres registrados en Oaxaca.  Este estudio destaca la importancia de este macizo montañoso por su diversidad de mamíferos, la cual es amenazada por agricultura de roza-tumba y quema, y actividades de desarrollo carretero.
Central American woolly opossum (Caluromys derbianus): distribution, ecology and conservation threats in Panamá
Authors: Ortega Josué , Mitre-Ramos Carolina , Geipel Inga , Ponce Marcos , González Publio , Vargas-González José de Jesús , Bermúdez Sergio
Published: February 2021

Existe poco conocimiento de la distribución y ecología de la zarigüeya lanuda centroamericana (Caluromys derbianus) en Panamá. Por lo tanto, el objetivo de este trabajo es actualizar datos geográficos e información ecológica para llenar este vacío. Con base en revisiones de especímenes de museos, datos publicados y observaciones de campo, obtuvimos 362 registros de C. derbianus en Panamá. Nuestros resultados muestran una amplia distribución de C. derbianus entre ambientes de tierras bajas tanto naturales como perturbados. Adicionalmente, proporcionamos información base de sus amenazas potenciales naturales y antrópicas, así como aspectos generales sobre su dieta en Panamá.
50 Gb/s Silicon Optical Modulators for Intra-Datacenter and On-Chip Optical Interconnect
Authors: Shao Sizhu , Hu Zhipeng , Xiao Zhixiong , Cao Guowei , Zhu Xingguo , Wu Yue , Feng Junbo , Guo Jin
Published: February 2021

We demonstrate 50 Gb/s optical signal generations by using the silicon optical modulators fabricated in the CUMEC CSiP180Al technology platform, which can be utilized in the intra-datacenter and on-chip optical interconnect.
Demonstration of Corrugation Pitch Modulated (CPM) DFB Lasers Based on Surface Grating and Oxide Aperture
Authors: Zhang Pengfei , Liu Can , Xiang Minwen , Ma Xiang , Zhao Gongyuan , Tang Bao , Lu Qiaoyin , Donegan John F. , Guo Weihua
Published: February 2021

We present regrowth-free CPM-DFB lasers based on the first-order surface-grating and oxide-aperture. The fabricated device has achieved stable single-mode operation from 10°C to 50°C with the threshold ~12.5mA and SMSR>42dB.
Tidal Traffic Prediction Model of Metropolitan Optical Network Based on Long Short-Term Memory
Authors: Ma Jiashun , Yang Hui , Bao Bowen , Yao Qiuyan , Peng Tao , Guo Huifeng , zhang Jie
Published: February 2021

In this paper, LSTM is applied to model the tidal traffic prediction of metropolitan optical network. The accuracy of prediction is stable over 94%, and can accurately identify the tidal migration period.
Dynamic Wavelength and Key Resource Adjustment in WDM based QKD Optical Networks
Authors: Lu Lu , Yu Xiaosong , Zhao Yongli , Zhang Jie
Published: February 2021

A Dynamic Wavelength and Key Resource Adjustment algorithm is proposed aiming at disaster tolerance and backup protection in WDM QKD Optical networks. Simulation shows the proposed algorithm performs well in terms of network blocking probability.
Crosstalk-Aware Routing, Core, and Wavelength Assignment in MCF-based SDM-QKD Optical Networks
Authors: Huang Haibin , Zhang Yushu , Zhang De , Liu Guanghong
Published: February 2021

A crosstalk-aware routing, core, and wavelength assignment mechanism is proposed for MCF-based SDM-QKD optical networks. The simulation results show that the accept ratio of requests is efficiently improved.
A Wavelength Assignment Scheme for QKD-based Dynamic IDC Networks over Multicore Fiber without Affecting the Coexisting Conventional Service
Authors: Jia Xianglong , Sun Yongmei , Niu Jianing
Published: February 2021

To guarantee security of IDC networks, we propose a heuristic wavelength assignment algorithm to transmit quantum signals by recycling wavelength fragments, through which QKD is integrated into IDC networks over MCF without affecting data services.
Optimization of time error in large scale synchronization network via quantum annealing method
Authors: Lv Bo
Published: February 2021

optimal combination problem for time error in synchronization network is proposed, formulated to quadratic binary models and solved via quantum annealing which shows better experimental results of optimal performance and time comparing with simulated annealing.
Routing and Key Assignment for Secure Multicast Services in Quantum Satellite Networks
Authors: He Xinyi , Li Lin , Zhao Yongli , Li Yajie , Yu Xiaosong , Zhang Jie
Published: February 2021

A routing and key assignment algorithm is first proposed for secure multicast services in Low-Earth-orbit(LEO) quantum satellite networks, which is evaluated in terms of secure probability compared with the benchmark algorithm.
Intensity Modulation and Heterodyne Coherent Detection based 100 Gbit/s/λ DMT-PON System
Authors: Wang Wei , Li Zibin , Zou Dongdong , Yi Xingwen , Li Zhaohui , Li Fan
Published: February 2021

The 100 Gbit/s/λ DMT PON is demonstrated based on intensity modulation and heterodyne coherent detection. And both CPE and RFP based schemes are discussed and compared for phase noise compensation. The power budgets after 10-km and 20-km SSMF transmission without dispersion management with RFP method are 35-dB and 32.9-dB, respectively.
Layered Graph based Routing and Spectrum Assignment for Multicast in Fixed/Flex-grid Optical Networks
Authors: Zhu Qingcheng , Yu Xiaosong , Zhao Yongli , Zhang Jie
Published: February 2021

We propose a layered graph based routing and spectrum assignment algorithm for multicast by considering distance-adaptive modulation in fixed/flex-grid optical networks. Simulation results show the good performance of the proposed algorithm.
Design and Analysis of Si-Based Vertical-Emitting Nanowire Lasers with Enhanced Bottom Reflectivity
Authors: Zhang Xinyao , Wu Chao , Zheng Jiahui , Yan Xin , Zhang Xia , Ren Xiaomin
Published: February 2021

Low-threshold Si-based vertical-emitting nanowire lasers are designed and analyzed. By introducing air and SiO2 between the nanowire and substrate, the bottom reflectivity is significantly enhanced, resulting in much lower threshold and smaller cutoff diameter.
Dynamic Time-Aware Path Optimization Scheme in TDM based Quantum Key Distribution Optical Networks
Authors: Li Xinyang , Yu Xiaosong , Zhao Yongli , Li Yajie , Zhang Jie
Published: February 2021

A dynamic time-aware path optimization algorithm is proposed to re-configure established services in TDM based quantum key distribution optical networks. Simulation shows it has good performance in terms of success rate of QKD services.
Deep Reinforcement Learning Enabled Network Routing Optimization Approach with an Enhanced DDPG Algorithm
Authors: Meng Lingyu , Yang Wen , Guo Bingli , Huang Shanguo
Published: February 2021

This paper proposes an enhanced DDPG algorithm solving network routing problem to minimize the average network delay. Simulation results shows that the algorithm has good convergence speed improvement in routing optimization.
Cross-domain Interconnection with Time Synchronization in Software-defined Time-Sensitive Networks
Authors: Guo Mengjie , Shou Guochu , Xue Junli , Hu Yihong , Liu Yaqiong , Guo Zhigang
Published: February 2021

We propose a software-defined Time-Sensitive Networking cross-domain interconnection scheme based on a coordinate controller and conduct a time synchronization experiment. The results show the scheme is valid in time synchronization.
Studies on dynamics of hot electrons in metal and the influence on photodetection
Authors: Tang Xiaobing , Hao Zhibiao , Wang Lai , Wang Jian , Xiong Bing , Sun Changzheng , Li Hongtao , Han Yanjun , Luo Yi
Published: February 2021

The dynamics of hot electrons in metal including generation, transport and injection have been studied theoretically and experimentally. Substrate-side illumination is demonstrated to effectively improve the performance of hot electrons photodetectors.
Towards Low-Latency Distributed Tasks Collaboration by Joint Optimization of Transmission, Computation and Storage Resources Allocation in Edge Computing
Authors: Li Jialong , Hua Nan , Zhao Chen , Li Yanhe , Zheng Xiaoping , Zhou Bingkun
Published: February 2021

We propose a collaboration strategy by jointly considering the transmission, computation, and storage resources to reduce the completion time of distributed tasks in edge computing. Results show that over 50% completion time reduction is achieved.
Resource Allocation Algorithm for Multicarrier Non-orthogonal Multiple Access Visible Light Systems
Authors: Wang Geyang , Shao Yingjie , Chen Lian-Kuan , Zhao Jian
Published: February 2021

A novel subcarrier and power allocation algorithm for multicarrier NOMA VLC systems is proposed. Simulations show that the proposed algorithm exhibits better throughput and user fairness than conventional fixed power allocation and the GPRA algorithm.
Leveraging Brain-like Resource Algorithm to Achieve Efficient Resource Allocation in Datacenter Optical Networks
Authors: Zhao Guanliang , Yang Hui , Wu Yichen , Jiang Yong , Guo Huifeng , Zhang Jie
Published: February 2021

This paper proposes a brain-like resource allocation strategy for data center optical networks with high bandwidth demand differences. Experiments show that this strategy can improve bandwidth utilization, reduce network latency and reduce blocking rate.
Three-dimensional probabilistic shaping OFDM-PON system based on novel orthogonal coded modulation
Authors: Jiang Lei , Liu Bo , Mao Yaya , Xu Xing , Ren Jianxin , Chen Shuaidong , Wu Xiangyu , Song Xiumin , Zhang Jingyi , Liu Xueyang , Zhao Delin , Xin Xiangjun
Published: February 2021

A nonuniform-distributed OFDM-PON system based on 3D probabilistic shaping with novel orthogonal coded modulation is proposed. Experimental results indicate that the proposed system obtains better BER performance than conventional QAM scheme.
A QPSK-Pilot Carrier Phase Recovery Algorithm with Improved MI for PS-64QAM Systems
Authors: Sun Zhongliang , Hu Jin , Xu Xuekai , Lu Yueming , Qiao Yaojun
Published: February 2021

Filter-oriented carrier phase recovery algorithms with MI impairment are ana-lyzed in PS systems. A QPSK-pilot scheme is investigated to compensate the penalty in a PS-64QAM system, achieving approximated 1 bit/symbol gain in lower SNRs.
A Novel MIMO method based on Square Contour Algorithm for Joint Few-mode/Multi-core Optical Transmission System
Authors: Hepeng Hou , Feng Tian , Ruichun Wang , Qi Zhang , Qinghua Tian , Yongjun Wang
Published: February 2021

This paper proposes and demonstrates a novel MIMO equalization algorithm to suppress the crosstalk between different modes in the space division multiplexing (SDM) transmission system. Improved convergence speed and steady state error are demonstrated in the simulation platform. Compared with traditional MIMO equalization, the proposed method improves the optical signal-to-noise ratio (OSNR) about 3dB at the FEC threshold value of 1e-3.
All-optical, Broadband Microwave Photonic Image-Reject Mixer with Local Oscillator Frequency Doubling
Authors: Sheng Mengmeng , Liu Sijia , Gong Caili , Wei Yongfeng
Published: February 2021

A microwave photonic image-reject mixer with local oscillator frequency doubling is proposed. Results show that the maximum image rejection ratio is 47.46 dB and spur suppression ratio is above 69 dB from 10 to 40GHz.
QPSK Modulation Effects on the RF Characteristics of Quantum-dash Laser Based WDM System
Authors: Alkhazraji E. , Ragheb A. , Esmail M. A. , Fathallah H. , Alshebeili S. , Qureshi K. K. , Khan M. Z. M.
Published: February 2021

Effect of DP-QPSK modulation (28GBaud) and transmission on RF-characteristics is investigated for a 3-channel multiplexed system employing InAs/InP quantum-dash laser comb-source showing 3dB-bandwidth increase by ~16.7%, linewidth by ~7 kHz, and phase-noise by ~4.7 dBc/Hz.
A Modulation Format Identification Scheme Based on Modified PSO Clustering in Stokes Space
Authors: Zhao Ruqing , Xu Hengying , Bai Chenglin , Sun Weibin , Yang Lishan , Yu Xinkuo , Zhou Tanglei , Li Baokun
Published: February 2021

Based on modified particle swarm optimization clustering, we have proposed and verified a modulation format identification (MFI) scheme. It searches multiple local extrema in s2-s3 plane and counts the number of clusters to perform MFI.
Near-infrared Photodetection in Graphene/β-In2Se3 Heterostructure
Authors: Shao Wen , Xie Xiaoping , Zheng Yunqiang , Wang Wei , Li Tiantian , Wang Feifan , Wang Yong , Law Stephanie , Gu Tingyi
Published: February 2021

Photoresponsivity of 1.17 A/W is observed in graphene/molecular beam epitaxy grown β-state In2Se3 photodetector at 1550 nm light excitation and 0.35 V bias, with smaller than 2 ms response time.
A Novel Scheme for Stable Frequency Dissemination Over Fiber in Mesh Networks
Authors: Liang Jing , Zhu Jian , Guo Bingli , Huang Shanguo
Published: February 2021

We propose a stable frequency dissemination scheme based on mesh networks. What’s new is that the scheme satisfies both ring and point-to-point models. In the simulation, phase drifting we obtained is less than 0.074rad/5×103s.
Fast Adaptive Digital Back-propagation Algorithm For Fiber Nonlinear Compensation
Authors: Chen Xi , Zhang Qi , Gao Ran , Xin Xiangjun , Wang Xishuo , Tian Qinghua , Tian Feng , Wang Yongjun , Hou Yujuan , Yang Leijing
Published: February 2021

A novel fast adaptive digital back-propagation algorithm for estimating the product of nonlinear coefficients and compensation factors is proposed. Fast convergence is achieved in the simulation transmission of 60Gb/s-64QAM over a 5*80km single channel.
Adaptive Optics Compensation of Hybrid Input-Output Algorithm for Gaussian-beam in Satellite-to-Ground laser communication links
Authors: Li Shanshan , Chang Huan , Zhang Qi , Cao Guixing , Shen Yufei , Tao Ying , Chen Dong , Li Cong , Gao Zihe , Qian Jinxi
Published: February 2021

A hybrid input-output algorithm HIOA-based AO is proposed to compensate Gaussian beam propagating through turbulence. Simulation results show it can effectively ameliorate beam distortion by turbulence. 50 or more iterations are sufficient for HIOA convergence.
A QC-LDPC Design Considering the Limited Number of Decoding Iterations for Optical Communications
Authors: Zhang Wei , Zhao Jian
Published: February 2021

We propose a QC-LDPC design by optimizing the degree distribution under a limited number of decoding iterations. Simulations show that it achieves better performance than conventional QC-LDPC for different code rates and iteration numbers.
Modes Multiplexing Conversion Based on Multi-plane Light Conversion
Authors: Bian Yiming , Li Yan , Li Wei , Hong Xiaobin , Qiu Jifang , Chen Erhu , Wu Jian
Published: February 2021

We achieve low-loss, low-crosstalk modes multiplexing conversion based on multi-plane light conversion. For the 6 modes conversion with 10 phase plates, the insertion loss and the mode-dependent loss are 0.020dB and 0.020dB, respectively.
Machine Learning Assisted Clock Recovery for Pulse Position Modulation in Free Space Optical Communication
Authors: Zhang Shenmao , Dai Xiaoxiao , Ao Xueyuan , Wang Zhongzhong , Zhong Linsheng , Zuo Jinxin , Gao Tianlu , Zhang Jun , Yang Qi , Liu Deming
Published: February 2021

We apply a multi-layer perceptron as the timing error detector for PPM signal clock recovery. Simulation results show that the proposed MLP-based CDR method can improve the accuracy of phase detection with large sampling frequency offset over 1200 ppm.
Nonlinear Compensation for OAM Optical Fiber Communication System Based on Naive Gaussian Bayes Algorithm
Authors: Zhou Sitong , Gao Ran , Zhang Qi , Chang Huan , Xin Xiangjun
Published: February 2021

A nonlinear compensation scheme for the OAM optical fiber communication system has been presented based on NGB algorithm. The simulation results demonstrate that the accuracy and calculation complexity of the NGB algorithm is improved significantly.
FPGA-based PPM modulation and demodulation algorithm
Authors: Ji Chengyue , Mei Qin , Li Qing , Cai Shanyong , Jiang Di , Wu Fen , Zhang Zhiguo
Published: February 2021

A 4-PPM modulation and demodulation algorithm based on FPGA is demonstrated. Experimental results show that when the BER is 1E-6, the receiving sensitivity of 4-PPM modulation is 5.11 dB higher than that of OOK.
Phase Noise of Kramers­Kronig Direct­Detection Receiver in Optical Carrier­Assisted Nyquist 16­QAM Single­Sideband Transmission
Authors: Zhang Hong­Bo , Deng Ming­Liang , Wang Hai­Shi
Published: February 2021

We demonstrate and analyze the phase noise of optical carrier­assisted (OCA) single­sideband system with Kramers­Kronig receiver. The results show that the tardy variation phase noise induced by Kramers­Kronig receiver is periodically linear related to the guard band and baud rate.
Delay Deviation Tolerance of Carrier Assisted Differential Detection System
Authors: Wang Zhaohui , Zhu Mingyue , Zhang Jing , Yi Xingwen , Xu Bo , Qiu Kun
Published: February 2021

We investigate the delay deviation tolerance of A-CADD and S-CADD receivers in optical twin-SSB system. The results show that A-CADD has a remarkable delay deviation tolerance than S-CADD scheme with 50-Gbaud twin-SSB 16-QAM signal transmission.
InGaN Visible Light Heterojunction Phototransistor
Authors: Liao Zhong-kun , Lv Ze-sheng , Jiang Hao
Published: February 2021

InGaN based heterojunction phototransistors with multiple-quantum-well collector and polarization-doped p-base were fabricated. The devices exhibit a 405/490-nm rejection ratio of more than 103 under 1 V bias. A peak responsivity of ~0.9 A/W was obtained, indicating a gain of ~2.7.
128-SP-QAM scheme Based on new code modulation Probability Shaping and optimized K-means Algorithm
Authors: Zhai Huimin , Zhang Qi , Gao Ran , Wang Xishuo , Xin Xiangjun , Chang Huan , Tian Feng , Tian Qinghua , Wang Yongjun , Wang Fu , Rao Lan
Published: February 2021

A novel 128-SP-QAM scheme based on probabilistic shaping and K-means is proposed in order to optimize the system performance. The simulation results show that the scheme can effectively improve the BER performance of 128-SP-QAM.
Gain Optimization of Two-pump Fiber Optical Parametric Amplifier via a Differential Evolution Algorithm
Authors: Cheng Le , Sui Hao , Zhang Yufeng , Yu Lei , Zhu Zhenyu , Zhu Hongna , Zou Xihua , Luo Bin
Published: February 2021

A differential evolution algorithm is adopted to determine the parameters of two-pump fiber optical parametric amplifier numerically. The optimized gain spectra with wider and flatter properties are obtained.
Optimal Resource Allocation in Optical Codebook-Based Multi-Cell Systems with Fiber-Wireless Fronthaul
Authors: Zheng Wei , Wang Xiaowen , Zhang Chongfu , Huang Huan , Qiu Kun
Published: February 2021

An optimal resource allocation scheme is proposed for optical codebook-based multi-cell systems with fiber-wireless fronthaul, where the multi-cell interference is considered. The total spectral efficiency and bit-error-rate curves via different methods are given and discussed.
A Hybrid Two-Segment Microring Structure Combining Optical Pre-Emphasis and Modulation for High Bandwidth Electronic-Optical Interconnect
Authors: Ding Qikan , Ji Pengfei , Lin Wenmiao , Wu Hui , He Weifeng
Published: February 2021

We propose a hybrid two-segment microring structure combining optical pre-emphasis and modulation with 4.3dB pre-emphasis and 30pm/V modulation efficiency. Simulation results show up to 39% increase of eye height at the data rate of 80Gb/s.
Numerical model of spontaneous mode locking and frequency comb generation in a Fabry-Perot laser based on split-step time domain
Authors: Cao Sheng , Yang Zhuohui , Zhong Hancheng , Zhang Xinzhong , Yu Ying , Yu Siyuan
Published: February 2021

We propose an algorithm based on split-step time domain dynamic modeling (SS-TDDM) to solve the time-dependent coupled wave equations of the traveling domain wave model (TDWM). Using this effective and high-speed model, we analyze the spontaneous mode locking and frequency comb generation in a Fabry-Perot laser.
Optimize Encoding of Polar Codes in CO-OFDM Systems Using Long Short-term Memory Neural Network
Authors: Deng Boyou , Tian Qinghua , Xin Xiangjun , Zhang Qi , Wang Yongjun , Tian Feng , Jing Zexuan
Published: February 2021

We demonstrate and verify an optimizing scheme enabled by neural network for the encoding process of polar codes coded coherent optical orthogonal frequency division multiplexing (CO-OFDM) transmission system by simulation.
Secure OFDM-PON based on Chaotic Mapping and Novel 3D 16-Ary Constellation with Dual Polarization Modulation
Authors: Zhang Yiqun , Jiang Ning , Chen Lu , Peng Jiafa , Qiu Kun
Published: February 2021

We propose a physical layer security enhancement OFDM-PON scheme based on chaotic mapping and novel 3D dual-polarization constellation. The numerical results indicate it shows better BER performance and higher security compared with conventional 3D configuration.
Spectrum Efficiency and Cost Evaluation for G.654.E Fiber Based Optical Transmission Systems
Authors: Guo Ningning , Li Yongcheng , Gao Mingyi , Shen Yichun , Liu Zhizhong , Jiang Xinli , Cao Shanshan , Qian Yigang , Shen Gangxiang
Published: February 2021

We evaluate the spectrum efficiency and the cost of a G.654.E fiber based optical transmission system. Simulation results show that, for a 400G optical transmission system, using G.654.E fiber with 0.17-dB/km attenuation coefficient and 130-μm2 large effective area (Aeff) can achieve the best tradeoff between spectrum efficiency and system cost.
Fiber Nonlinearity Mitigation Scheme based on Geometric Constellation Shaping via End-to-end Auto-encoder Learning and KNN Deciding
Authors: Zang Yuanru , Zhao Yan , Chen Xue
Published: February 2021

A novel scheme to mitigate fiber nonlinearity based on geometric constellation shaping via end-to-end auto-encoder learning and KNN deciding is investigated. Simulation results show that the scheme could effectively improve Q-factors under nonlinear situations.
Performance Analysis of An LED-UOWC System Based on Modified BP Decoding Algorithm
Authors: Yang Yi , Zhang Yi , Yin Yafang
Published: February 2021

An LED-UOWC experimental system based on improved BP decoding algorithm is constructed. The code length is 2400, the code rate is 1/2, and the iterations is 10, which can effectively improve the system's BER performance.
Routing, Spectrum and Core Assignment based on Auxiliary Matrix in the Intra Data Center Networks using Multi-Core Fibers with Super Channel
Authors: Luo Zhihuan , Yin Shan , Jiang Liyou , Zhao Ligang , Huang Shanguo
Published: February 2021

This paper proposes a RSCA algorithm through auxiliary matrix and super channel in intra Data Center with SDM-EON to suppress crosstalk and fragmentation. Simulation results show the proposed algorithm performs better than benchmark method.
Brownian motion-based Constellation Scrambling Encryption Method to enhance the Security of CO-OFDM/OQAM Systems
Authors: Ding Ding , Zhou Yang , Xiao Ling , Yu Zifang , Zhang Lei , Fang Xi
Published: February 2021

In this paper, we propose a Brownian motion-based Constellation Scrambling Encryption (BCSE) method to enhance the security of CO-OFDM/OQAM systems. Simulation results indicate the safety of CO-OFDM/OQAM system is significantly improved when employing BCSE method.
Phase Modulation-Enabled Improvement of Link Loss Budget for Bandwidth-Efficient and Low-Complexity Mobile Fronthaul
Authors: Deng M. L. , Liu Y. , Zhang Q. W. , Guo X. J. , Wang A. D. , Lu B. , Zhu L.
Published: February 2021

PM is proposed to enhance loss budget for SNR-hungry mobile fronthaul involving analog optical links. Simulation results demonstrate that, for phase-modulated 24 20MHz mobile signals, a link loss budget improvement of ⩾ 7.3dB is achievable.
High Efficient Modes Diversity Receive Scheme for Free Space Optical Communications under Random Angular Jitter
Authors: Zhu Long , Wang Andong , Deng Mingliang , Zhang Qianwu , Lu Bing , Guo Xiaojin
Published: February 2021

By introducing 3-mode and 6-mode FMF photonic lanterns, we present modes diversity receive scheme for FSOC system under random angular jitter with high efficiency. The coupling efficiency improved 30.77% and 50.23%, when the radial offset is 7 μm.
Decision making for multi-armed bandit problem utilizing two parallel uncorrelated wideband complex chaos
Authors: Peng Jiafa , Jiang Ning , Liu Shiqin , Zhao Anke , Zhang Yiqun , Qiu Kun
Published: February 2021

We propose a solution to multi-armed bandit problem by utilizing two simultaneously-generated uncorrelated wideband complex chaotic signals. It is experimentally demonstrated indicates that any number-armed bandit problem can be successfully solved.
Antisymmetric-Nonlinear LNOI Waveguide for Highly Efficient Second-Harmonic Generation
Authors: Zhang Xiangxiu , Sun Changzheng , Xiong Bing , Hao Zhibiao , Wang Jian , Wang Lai , Han Yanjun , Li Hongtao , Luo Yi
Published: February 2021

A novel LNOI waveguide that breaks the symmetry of quadratic nonlinearity is proposed to enhance the efficiency of modal-phase-matched second-harmonic generation. The theoretical conversion efficiency is as high as 13000%/W/cm2.
A Frequency Offset Estimation and Compensation Method Compliant with the CCSDS 131.2-B-1 Standard by using Kalman Filter
Authors: Li Hao , Li Yingchun
Published: February 2021

We propose a method which uses frame header, pilot and Kalman filter to estimate and compensate frequency offset. Within frequency offset range -800KHz~800KHz, the estimated absolute error is less than 1KHz.
Optical Label-enabled Low-cost DWDM Optical Network Performance Monitoring Using Novel DSP Processing
Authors: Du Jinhao , Yang Tao , Shi Sheping , Chen Xue , Liu Zhengyu , Wang Jiao
Published: February 2021

A low-cost DWDM optical network performance monitoring scheme based on Optical Label with SRS mitigation DSP is proposed. Accurate power monitoring of each wavelength channel could be achieved simultaneously even under severe SRS crosstalk.
Non-data-aided less-iterations scheme for fiber nonlinearity compensation with low computational complexity
Authors: Li Baokun , Bai Chenglin , Xu Hengying , Yang Lishan , Sun Weibin , Yu Xinkuo , Zhao Ruqing , Zhou Tanglei
Published: February 2021

We proposed a non-data-aided less-iterations clustering scheme to compensate the fiber nonlinearity for PDM-16QAM/32QAM/64QAM signals. It can compensate the impairments caused by ASE and Kerr nonlinearity, and improve the BER performance with low computational complexity.
Optical De-aggregation from 9QAM to PAM3 using Phase-sensitive Amplifier-based Optical Quadrature De-multiplexing and Two-level Vector Moving
Authors: Cui Jiabin , Ji Yuefeng , Lu Guo-Wei , Wang Hongxiang , Zhang Min
Published: February 2021

An optical de-aggregation scheme based on quadrature de-multiplexing and vector moving is proposed. A 10GBaud 9QAM is de-aggregated into two 10GBaud PAM3s and a 10-km short-reach transmission is performed before signal detections.
Laser Spot Centroid Locating and Tracking Based on Tobit Kalman Filter in FSO Communications
Authors: Xiong Jiao , Zhan Yueying , Yang Ning , Yang Lei
Published: February 2021

An improved laser spot centroid extraction algorithm based on Tobit Kalman filter is proposed for FSO communication systems. The performance of the algorithm in terms of the mean and variance of spot position offset are evaluated and discussed.
Kramers-Kronig Carrierless Amplitude/Phase Modulation System without Extra Digital Upsampling
Authors: Yu Chao , Chen Genxiang , Wang Xishuo , Sheng Xia , Xu Xing , Wang Yongjun
Published: February 2021

We propose a new transceiver solution named KK-CAP-NQAM that combines Kramers-Kronig (KK) reception with carrierless amplitude/phase modulation (CAP) technology. This system's KK receiver operates without extra digital upsampling.
A new scheme using convolutional neural network to recognize orbital angular momentum beams disturbed by atmospheric turbulence
Authors: Wang Jin , Zhu Bing
Published: February 2021

We proposes a new neural network-assisted scheme for identifying OAM beams disturbed by atmospheric turbulence from the one-dimensional signals detected by the ring photodetector, which improves the recognition efficiency while the accuracy does not decrease.
Ultralow Timing Jitter Pulses from a SESAM Mode-locked Yb-fiber Laser
Authors: Gu Xiaorong , Cao Xinru , Li Yao , Chen Haidong , Liu Youwen
Published: February 2021

We demonstrate 199-attosecond timing jitter [10 kHz-21.25 MHz] pulses from an ultrashort SESAM mode-locked Yb-fiber laser. This timing jitter is the lowest for fiber lasers mode-locked by real saturable absorbers.
A metasurface-assisted fiber laser enables generation of high-power and high-purity structured beams
Authors: Wang Chuanshuo , Gui Lili , Qiu Keqing , Cai Yuekai , Gan Yunhai , He Fang , Xu Kun
Published: February 2021

We propose a compact method of vortex beam generation directly inside a fiber cavity with a plasmonic metasurface, which holds potential for producing high-power and high-purity structured beams.
Convolutional Neural Network Equalizer for Short-reach Optical Communication Systems
Authors: Zhang Jing , Yan Lianshan , Jiang Lin , Yi Anlin , Pan Yan , Pan Wei , Luo Bin
Published: February 2021

A novel convolutional neural network equalizer has been proposed and demonstrated for eliminating linear and nonlinear distortions. The BER performance of 64-Gbit/s PAM4 signal over 137-km SSMF can be achieved below 7%FEC threshold.
Nonlinear Mitigation with TL-NN-NLC in Coherent Optical Fiber Communications
Authors: Zhang Wanting , Jin Taowei , Xu Tao , Zhang Jing , Qiu Kun
Published: February 2021

We propose a low complexity transfer-learning assisted neural-network nonlinear compensation (TL-NN- NLC) scheme. The experimental results show 1.3-dB quality factor (Q-factor) improvement for 128 Gb/s polarization multiplexed (PM) 16-QAM coherent optical transmission over 800-km SSMF.
Two-Stages Multimedia Data Encryption and Compression via Joint Chaotic Compressive Sensing and Latent Vector Transmission
Authors: Pepe Alberto , Liu Xin , Khan Faisal Nadeem , Fu H.Y.
Published: February 2021

we propose a digital communication system in presence of noise and quantization guaranteeing two-levels, joint dimensionality reduction and security of multimedia data with the aid of compressive sensing theory and a stacked autoencoder architecture.
Photonic Compressive Sampling of Sparse Broadband RF Signals using a Multimode Fiber
Authors: Ding Kaiqiang , Meng Ziyi , Yu Zhenming , Ju Zhenyu , Zhao Zhengxiang , Xu Kun
Published: February 2021

We propose a photonic compressive sampling scheme based on multimode fiber for radio spectrum sensing, which shows high accuracy and stability, and low complexity and cost. Pulse overlapping is utilized for a fast detection.
Mitigation of Multi-Source Modulation Distortions in A-RoF Link by Using Transfer Learning aided ANN
Authors: Liu Enji , Yu Zhenming , Xu Kun
Published: February 2021

We adopt transfer learning aided artificial neural network (TL-ANN) as the approach of post digital signal process in A-RoF link. The proposed method could mitigate multi-source modulation distortions and decrease training cost of ANN simultaneously.
Weak microwave signal detection based on microwave photonics-enabled single-photon technology
Authors: Chen Xiaoxue , Li Shangyuan , Xue Xiaoxiao , Zheng Xiaoping
Published: February 2021

A method for weak microwave signal detection based on microwave photonics-enabled single-photon technology is proposed and experimentally demonstrated, showing signal waveform and the minimum detectable signal is as low as -112.8 dBm without electrical amplifications.
An Effect of Beam Radius Control on FSO Communication for Vehicles in Driving Conditions
Authors: Lee Kwanyong , Lee Chang-Hee
Published: February 2021

An effect of beam radius control on FSO communication for vehicles in driving condition was studied. The beam radius control was effective for driving conditions with a limited beam radius and in severe vibration condition.
Multi-octave linearized off-quadrature biased MZM analog optical link using blind digital linearization
Authors: Bai Wenlin , Zou Xihua , Li Peixuan , Pan Wei , Yan Lianshan , Luo Bin
Published: February 2021

A training-free blind digital linearization algorithm is proposed for the off-quadrature biased MZM analog optical link desiring high linearity and multi-octave operation bandwidth. Simultaneous suppression of IMD2 and IMD3 by ~20 dB is experimentally demonstrated.
Chromatic Dispersion Immune Photonic Microwave Frequency Shift Keying Pulse Generator
Authors: Lei Mingzheng , Zhu Min , Gao Xinlu , Song Chunqi , Bai Yunping , Zheng Zhennan , Li Aijie , Huang Shanguo
Published: February 2021

A photonic microwave FSK pulse generator based on carrier-suppressed double sideband modulation is proposed. The simulation results show that the pulse generator is free from the chromatic dispersion-induced power fading and has high receiving sensitivity.
Experimental Analysis of laser Dynamics in Single Mode FP-LD Subjected to Dual-Beam Injection
Authors: Zhang Limin , Chen Hao , Zhu Nan , Bassi Snehi , Nakarmi Bikash , Pan Shilong
Published: February 2021

The dynamics of dual-beam injection into single mode FP-LD are analyzed. With the wavelength of injected beams unchanged and injection strength changed, the dynamics are observed and determined as scenario A, B or C.
A Simple Full-duty-cycle Triangular Pulse Train Generation Scheme Based on a Dual-drive Mach-Zehnder Modulator
Authors: Li Jian , Hu Jingjing , Zhao Jiayi , Gu Yiying , Li Xiaozhou , Zhao Mingshan
Published: February 2021

We demonstrate a 5GHz periodical triangular pulse train generation employing photonic link without any signal processing. The tunability of triangular pulses generation is realized by adjusting the frequency of the input microwave signal.
Theoretical Analysis on OPLL-based Phase Modulated RF Photonic Links
Authors: Ding Ding , Fang Xi , Zhao Cheng , Jiang Hua , Gao Xianwei , Fu Yixin , Zhang Lei
Published: February 2021

A linear system model for OPLL-based phase modulated RF photonic link is derived. With the model, link gain, output noise and nonlinear distortions are analyzed. Theoretical results are validated by simulations and reachable link SFDR when loop delay given is discussed.
Photonics-based Reconfigurable Multi-band Dual-chirp Microwave Waveform Generation
Authors: Zhao Hongshi , Ma Jianxin
Published: February 2021

A novel photonic scheme for multi-band dual-chirp waveforms generation is proposed. The bandwidth-quadrupling dual-chirp waveforms at five consecutive bands without high frequency components are simultaneously generated after balanced detection between the modulated and unmodulated lightwaves.
Improving the Performance of an Optoelectronic Oscillator by Employing a Whispery Gallery Microwave Cavity
Authors: Chen Haibo , Yang He , Ban Ya , Wang Chao , Lu Yushan , Huang Kai , Yang Fan , Liu Dan , Yuan Yuan , Yan Dongliang , Chen Xing
Published: February 2021

A whispering gallery microwave cavity (WGMC) is used in the classical optoelectronic oscillator (OEO). The phase noise of the WGMC-OEO running near 9.2 GHz is improved by 27 dB at 10 Hz frequency offset.
Suppression of Even-Order Distortions in Directly Modulated APL for the Mobile Fronthaul System
Authors: Cao Ying , Ma Jianxin
Published: February 2021

A method based on the push-pull manner is proposed in the directly-modulated analog photonic link (APL) to eliminate IMD2. Nine 200 MHz IF signals are experimentally achieved the reduction (>1 %) of EVM over 1.5km SSMF.
Photonic Generation of Multi-Band Dual-chirp Microwave Waveform with Increased Time-Bandwidth Product
Authors: Yang Jialing , Ma Jianxin
Published: February 2021

A simple scheme to generate multi-frequency dual-chirp microwave waveform with increased time-bandwidth product based on microwave photonics is proposed. The waveforms including center frequency-bandwidths of 10GHz-3.2GHz, 20GHz-3.2GHz, and 30GHz-3.2GHz are simultaneously generated with two cascaded polarization modulators.
Photonic Generation of Microwave Waveform with Low RMSE Based on Dual-Parallel Mach-Zehnder Modulator
Authors: Chen Haoyu , Ma Jianxin
Published: February 2021

A photonics waveform generation based on a dual-parallel Mach-Zehnder modulator and a balanced photo-detector is proposed. The accuracy of the generated waveforms is improved by introducing the 5th Fourier component.
Photonic generation of phase-coded microwave signal with tunabilities
Authors: Zhai Wensheng , Yao Jianbin , Xin Yunxia , Zhang Ruijiao , Yang Hai
Published: February 2021

We propose a photonic scheme to generate a tunable frequency phase-coded microwave signal based on a phase modulator and balanced detection. The experimental results implement 30 GHz signal with a coding rate of 5 Gb/s.
Chip-based tunable all-optical logic gates via four-wave mixing in graphene-on-silicon microresonators
Authors: Wu Wei , Sun Qibing , Wang Guoxi , Zhang Lingxuan , Zhao Wei
Published: February 2021

We present a practical tunable all-optical logic gate based on the FWM effect in the graphene-on-silicon (GoS) microresonator. The GoS microresonator could produce broadband flat dispersion with multiple zero-dispersion wavelengths (ZDWs) by electrically tuning the graphene.
Excitation-collection dual resonance of quantum dot in micropillar cavity
Authors: Liu Shunfa , Wei Yuming , Yu Ying , Liu Jin
Published: February 2021

We have investigated the cavity-resonant excitation of quantum dot which is spectrally and spatially coupled with the fundamental mode of micropillar, achieving a single photon source that is highly efficient both in excitation and emission.
Enhanced emission and second harmonic generation from WS2 by using dielectric circular Bragg resonators
Authors: Chen Bo , He Zhe , Liu Zhuo-Jun , Wang Yun-Kun , Gao Yu-Nan , Aharonovich Igor , Xu Zai-Quan , Liu Jin
Published: February 2021

We demonstrate a two-dimensional monolayer WS2 efficiently coupled to a dielectric circular Bragg resonator (CBR). The coupling of the WS2 and CBR leads to the pronounced enhancements in both photoluminescence and second harmonic generation.
Entropy estimation of optical chaos in integrated silicon optomechanical cavities for physical random number
Authors: Shi Binglei , Xiong Xueyan , Yang Yanling , Ge Li , Wu Jiagui
Published: February 2021

We evaluated the entropy of mesoscopic chaos from photonic-crystal optomechanical (PhC-OM) microcavity for physical random bit (PRB) generation. The NIST Special Publication 800-90B is used and the entropy generation rate is estimated to be 2.0Gb/s.
High power tapered fiber bundle 19×1 pump combiner
Authors: Zhang Hui , Lei Chengmin , Li Zhixian , Chen Zilun
Published: February 2021

We investigate a 19×1 tapered fiber bundle(TFB) pump combiner based on twist method. To our best knowledge, this is the first time 220/242 μm multimode fibers act as pump fibers for a 19×1 pump combiner.
Random Perturbations on Crosstalk in Quasi-homogeneous Multi-core Fiber with Bidirectional Transmission
Authors: Tong Ke , Wang Wenjie , Xiang Lian
Published: February 2021

A redefined discrete changes model is proposed to estimate the crosstalk of bidirectional transmission with random perturbations. Results show a large effective index difference increase the crosstalk obviously because of perturbations in quasi-homogeneous multi-core fiber.
Synthesis of Silver Nanoparticles using Rumex Crispus Extract and Evaluation of their Antibacterial Activities
Authors: Aruna Gandhi M. S. , Kumar V. Senthil , Li Qian
Published: February 2021

Nanoparticles are characterized by UV-Vis absorption spectroscopy, FTIR, XRD and SEM. The UV-Vis spectrum revealed the formation of silver-nanoparticles by exhibiting the typical surface-plasmon absorption maxima at 435 nm for the Rumex Crispus green extract.
Simultaneous Achievement of Large Negative Dispersion and High Birefringence in the Single-mode Photonic Crystal Fibers with Hexagonal Double Cladding
Authors: Bai Huiai , Chen Shuo , Wang Han , Tian Huiping
Published: February 2021

The article designs a novel hexagonal double cladding photonic crystal fiber with the inner-cladding elliptical hole. A large negative dispersion of -1068.78 ps/nm/km and high birefringence of 1.01×10-2 are achieved at 1.55 μm.
All-optical M-PSK Signal Regeneration using a Nonlinear-optical Loop Mirror (NOLM)
Authors: Cai Yaqi , Wen Feng , Guo Biao , Wu Baojian , Qiu Kun
Published: February 2021

We optimized key operational parameters of an attenuator-based nonlinear-optical loop mirror (Att-NOLM), achieving total 2.6dB Q2-factor improvement for the 16-PSK signals, which has only 0.4dB performance gap between the optimized Att-NOLM and the ideal regenerator.
Temperature-insensitive 2D tilt sensor based on a multifiber bundle
Authors: Luo Chengming , zheng Di , Liu Zhiming , Zou Xihua
Published: February 2021

A novel two-dimensional (2D) temperature-insensitive tilt sensor is proposed, utilizing four fibers containing two FBGs to form a multifiber bundle. 2-D tilt angle can be determined by monitoring the wavelength separations of the split peak in two FBGs.
Novel fiber Mach-Zehnder interferometer based on three micro-silica spheres and photonic crystal fiber
Authors: Wang Jin , Liu Bo , Wu Yongfeng , Mao Yaya , Zhao Lilong , Sun Tingting , Nan Tong , Han Yang , Liu Xueyang
Published: February 2021

A novel fiber Mach-Zehnder interferometer based on three micro-silica spheres and photonic crystal fiber is proposed in this paper. Experimental results indicate the proposed sensor has advantages of high mechanical strength and miniaturization.
Temperature Compensation of Ultra-high Resolution FBG Static Strain Sensor for Crustal Deformation Observation
Authors: Huang Wenzhu , Zhang Wentao , Li Fang
Published: February 2021

This paper proposed a high-resolution temperature compensation technique by measuring the effective cavity length of two FBG resonators, which can improve the static strain measurement resolution and reduce the long-term drift of the system.
A Simple Calibration and Implementation of LC-SLM
Authors: Liu Zichen , Tao Jin , Xiao Xi , Yu Shaohua
Published: February 2021

A simple LC-SLM interference calibration method is found, which overcomes the shortcomings of traditional calibration methods, such as instability, low accuracy and so on. The feasibility of the method is verified by phase setting experiment.
Two Antiresonant Modes in the Cascaded Silica Capillary Device with a Small Inner Diameter
Authors: Wang Kehong , Sun Wen , Yu Yang , Yang Yong , Zhang Xiaobei , Wang Tingyun
Published: February 2021

A cascaded device is fabricated by splicing a section of capillary and two single mode fibers whose reflection spectra show that there are two antiresonant (AR) modes with a small inner diameter of capillary.
Real-time Observation of Soliton Build-up and Collision Dynamics in Switchable Dual-wavelength Mode-locked Fiber Laser
Authors: Zhao Hengwei , Zhu Yuanjun , Xiang Fulin , Sun Xiangnan , Jin Lei , Set Sze Yun , Yamashita Shinji
Published: February 2021

In this report, by utilizing dispersive Fourier transform technique, the soliton dynamics including dual-wavelength mode-locking switched from single-wavelength mode-locking state and soliton collision are observed. This observation helps us to better understand the principle and to improve the performance of dual-wavelength mode-locking laser.
An S-tapered Fiber Sensor with Low Detection Limit for Human IgG
Authors: Meng Yan , Sun Yunxu , Zhang Jianyu , Liu Haowei
Published: February 2021

An S-tapered Fiber (STF) sensor is fabricated in this paper and achieve low detection limit of Human immunoglobulin (IgG) with 0.027 μg/mL, which shows a promising potential in detecting low concentration biological solution.
Improvement of Brillouin Frequency Shift Estimation Performance in BOTDR Using Twice Cross Correlation
Authors: Xiao Zhenyu , Yuan Xueguang , Zhang Yang’an , Huang Yongqing , Xi Lixia , Xu Shengyao , Shan Linan , Li Xuan
Published: February 2021

We propose a twice cross correlation method to improve Brillouin frequency shift estimation performance in BOTDR. Compared with conventional fitting methods, the processing time is reduced by over 10 times while maintaining high accuracy.
Enhancing the Frequency Resolution of BOTDR based on the combination of Quadratic Time-Frequency Transform and Wavelet denoising technique
Authors: Shan Linan , Xi Lixia , Zhang Yang’an , Yuan Xueguang , Wang Chen , Zhang Xiaoguang , Xiao Zhenyu , Li Xuan
Published: February 2021

To improve the measurement frequency resolution in BOTDR system, the combination algorithms of Quadratic Time-Frequency Transform and Wavelet denoising are proposed for replacing classical short-time Fourier transform (STFT).
Influence of rejection bandwidth of CTFBGs on Raman suppression in high-power MOPA fiber lasers
Authors: Wang Meng , Tian Xin , Zhao Xiaofan , Rao Binyu , Hu Qihao , Wang Zefeng
Published: February 2021

Here, the influence of rejection bandwidth of chirped and tilted fiber Bragg gratings on Raman suppression is studied in a 5 kilowatt-level direct LD pumped MOPA fiber laser. A better suppression could be achieved with a broader-band CTFBG, which is quite useful for further power scaling.
Impedance Characteristics Study of Packaged InGaN QD-based Micro-LED for Visible Light Communication
Authors: Ma Keming , Wei Zixian , Zhang Shi , Cao Zhiyuan , Wang Lei , Chen Chien-Ju , Wu Meng-Chyi , Wang Lai , Luo Yi , Dong Yuhan , Fu H. Y.
Published: February 2021

We fabricated and packaged a blue micro-LED with a diameter of 50-µm based on a single layer of InGaN quantum dot (QD) micro-LED for VLC, and then revealed its impedance characteristics by fitting with a modified equivalent circuit model.
Fast temperature extraction via Echo State Network for BOTDA sensors
Authors: Zhang Yufeng , Li Yingjie , Cheng Le , yu Lei , Zhu Hongna , Luo Bin , Zou Xihua
Published: February 2021

Brillouin optical time-domain analyzer (BOTDA) assisted by echo state network (ESN) for fast and accurate temperature extraction is proposed. Compared to curve fitting methods, the processing speed of proposed ESN algorithm is accelerated up to 20 times. Experimental work is carried out and verified with good agreement of the simulation results.
Topological Design and Fabrication of Bi, Er and Yb Co-Doped Optical Fibre with Flat Ultrabroad Emission
Authors: Luo Yanhua , Wei Shuen , Zhang Bowen , Yan Binbin , Zhang Jianzhong , Wen Jianxiang , Peng Gang-Ding
Published: February 2021

Through the topological engineering, Bi/Er/Yb co-doped optical fibre with the emission spectrum of an ultrabroad bandwidth of 692 nm and a high flatness of 0.611 has been predicted and designed.