bluuebunny/crossref_metadata_2025 huggingface dataset:
Conceito restringido da responsabilidade de mando no marco jurídico transicional na Colômbia ¿porta giratória para a intervenção da Corte Penal Internacional?
Authors: Camargo Alves Francisco
Published: February 2021

Com o presente trabalho, pretende-se estudar a aplicação do transconstitucionalismo aos problemas constitucionais oriundos do contato entre o ordenamento jurídico brasileiro e o Estatuto de Roma. Para isso, indaga-se: o transconstitucionalismo pode oferecer uma resposta capaz de evitar conflitos causados pela presunção de primazia de cada uma das ordens envolvidas aos problemas surgidos nesse relacionamento? À luz da proposta de razão transversal formulada pelo transconstitucionalismo, visualiza-se que, compreendidas, por cada sistema, as bases que levaram a adoção de determinadas disposições supostamente contrárias às suas, haverá um novo entendimento nesse difícil relacionamento, especialmente a partir do reconhecimento de um sistema jurídico multicêntrico cujas cortes se relacionam sob a ótica de uma racionalidade transversal. Para tanto, partir-se-á da análise da teoria do transconstitucionalismo de Marcelo Neves, evidenciando-se, especialmente, a relação entre direito estatal e direito internacional, seguindo-se ao estudo da relação entre tais ordens na perspectiva tradicional para, em seguida, analisar temas relacionados aos fundamentos e particularidades do direito penal internacional.
Carnival Optimizes Revenue and Inventory Across Heterogenous Cruise Line Brands
Authors: Beck Justin , Harvey John , Kaylen Kristina , Sala Corrado , Urban Melinda , Vermeulen Peter , Wilken Norman , Xie Wei , Iliescu Dan , Mital Pratik
Published: February 2021

Carnival Corporation & plc identified the need for a cutting-edge revenue management system; however, existing solutions from the airline and hospitality industries were not compatible with the idiosyncrasies of the cruise domain. As such, the company partnered with revenue analytics to build a complete revenue and inventory management system to meet its requirements. Yield optimization and demand analytics (YODA) is a system that leverages a unique quadratic programming model to jointly determine cruise prices and allocate cabin inventory to multiple cruises (e.g., 14-day and 7-day lengths) offered simultaneously on a given ship. The optimization inputs come from several machine learning algorithms that predict demand. YODA combines these algorithms with an elasticity model derived from an exponential curve to represent the unique price-sensitivity behavior observed in the cruise industry. The system generates millions of price recommendations each day and has been used to price voyages on 65 Carnival ships, approximately one quarter of the ships in the entire cruise industry, since December 2017. During A/B testing, YODA generated a 1.5%–2.5% incremental uplift in net ticket revenue, which is a significant revenue increase because Carnival was a Fortune 300 company in 2019.
Pricing Under Dynamic Competition When Loyal Consumers Stockpile
Authors: Gangwar Manish , Kumar Nanda , Rao Ram C.
Published: February 2021

Managers, let stockpiling be but at a higher price—don’t hope to cut stockpiling by lopping off promotions.
Additional records of black bear (Ursus americanus) in central-eastern México
Authors: Charre-Medellín Juan F. , Botello Francisco , Guzmán-Díaz Esmar O. , Mendiola-González Ma. Eugenia , Torres-García Ulises , Ángeles-Escudero Jorge I. , Rosas-Rosas Octavio
Published: February 2021

El oso negro (Ursus americanus) redujo significativamente su área de distribución en México en el siglo XX.  En los últimos años, sin embargo, hay evidencia de su presencia en áreas fuera del rango de distribución propuesto.  El objetivo es documentar un conjunto de registros nuevos de oso negro para los estados de Guanajuato, Querétaro y San Luis Potosí en el centro-este de México.  Se detectaron osos negros como resultado de acciones de monitoreo que incluyeron cámaras trampa, avistamientos y observación indirecta (huellas y eventos de depredación), realizados entre los años 2000 y 2019.  Detectamos la presencia de oso negro a través de seis registros en los estados de Guanajuato, Querétaro y San Luis Potosí, en un área cercana a la distribución más sureña para esta especie en el Continente Americano.  Cinco de las observaciones ocurrieron dentro de áreas naturales protegidas.  Las observaciones aumentan el número de especies de mamíferos registrados en el estado de Guanajuato a 95 y confirman la presencia del oso negro en los estados de Querétaro y San Luis Potosí.  Las observaciones proveen evidencia que respalda la hipótesis de que las poblaciones de oso negro del noreste de México se mueven hacia el centro-este de México a través de la Sierra Madre Oriental (SMO).  La presencia de oso negro en el centro-este de México señala la necesidad de intensificar el monitoreo sistemático de la biodiversidad en la SMO y en áreas protegidas de la región a través de programas de monitoreo y conservación.
Strategies to boost the mental health and learning disability nursing workforce
Authors: Glasper Alan
Published: February 2021

Emeritus Professor Alan Glasper, from the University of Southampton, discusses two recent policy reports which indicate a potential crisis in mental health and learning disability nursing
Understanding right ventricular myocardial infarction in prehospital care
Authors: Master Shamima
Published: February 2021

Right ventricular myocardial infarction (RVMI) most commonly occurs in relation to an inferior myocardial infarction. Patients with this condition where the culprit right coronary artery (RCA) is occluded have a poor prognosis. Early recognition and the specific treatment pathway for RVMI differ from the treatment for general acute coronary syndrome (ACS) which could help the paramedic to treat this condition more appropriately. This article explores current guidelines for the recognition and treatment of RVMI and the possible application of specific guidelines in a prehospital setting with regards to using right-sided precordial ECG, the administration of fluids and potential complications arising from vasodilatory drugs. Furthermore, the purpose of this article is to help educate and develop the understanding of RVMI in this high-risk subgroup who have an increased morbidity and mortality.
Recognising And Dealing With Staff Burnout
Authors: Oxtoby Kathy
Published: February 2021

Healthcare workers across the globe are experiencing high levels of stress due to the challenges brought by the pandemic. Kathy Oxtoby outlines some of the signs of burnout and the steps practice managers can take to improve their wellbeing
Development of a Land Suitability Framework for Sustainable Manure Utilization
Authors: Saha Gourab K. , Cibin Raj , Elliott Herschel A. , Preisendanz Heather E.
Published: February 2021

Highlights

We developed a land suitability framework for sustainable manure utilization based on seven water quality-related environmental vulnerability factors.

ArcGIS-based decision-support tools were developed that use readily available data for the U.S.

The tools can be adapted to any location in the U.S. for any livestock agricultural system.

In a case study, 19.9% of the study area was identified as potentially suitable for manure utilization.

2%, 33%, and 44% of the potential areas were highly, moderately, and marginally suitable, respectively.

Abstract. Intensive livestock agriculture is a significant source of nutrient pollution that contributes to water quality degradation worldwide. This study presents a land suitability framework and accompanying decision-support tools for sustainable manure management. The developed framework identifies potentially suitable areas for manure application in a user-defined area and further classifies the land as highly suitable, moderately suitable, marginally suitable, and unsuitable using seven environmental vulnerability factors considering landscape biophysical characteristics and proximity to streams. The decision-support tools, built in ArcGIS, were applied in a case study in western Pennsylvania. The ArcGIS toolbox, available from ScholarSphere (https://doi.org/10.26207/99tk-sn24), classified 2% of the case study area as highly suitable for manure application and 21% as unsuitable. Landscape slope and proximity to streams were the dominant vulnerability factors in the case study area. The framework and accompanying tools are transferable across watershed boundaries and can help identify areas where environmentally sustainable animal agriculture can be developed. Keywords: Decision-support tool, Land suitability analysis, Sustainable manure management, Vulnerability analysis.
Development and Evaluation of a Variable-Rate Irrigation Management Method in the Mississippi Delta
Authors: Sui Ruixiu , Baggard Jonnie
Published: February 2021

Highlights

We developed and evaluated a variable-rate irrigation (VRI) management method for five crop years in the Mississippi Delta.

VRI management significantly reduced irrigation water use in comparison with uniform-rate irrigation (URI). There was no significant difference in grain yield and irrigation water productivity between VRI and URI management.

Soil apparent electrical conductivity (ECa) was used to delineate irrigation management zones and generate VRI prescriptions.

Sensor-measured soil water content was used in irrigation scheduling.

Abstract. Variable-rate irrigation (VRI) allows producers to site-specifically apply irrigation water at variable rates within a field to account for the temporal and spatial variability in soil and plant characteristics. Developing practical VRI methods and documenting the benefits of VRI application are critical to accelerate the adoption of VRI technologies. Using apparent soil electrical conductivity (ECa) and soil moisture sensors, a VRI method was developed and evaluated with corn and soybean for five crop years in the Mississippi Delta. Soil ECa of the study fields was mapped and used to delineate VRI management zones and create VRI prescriptions. Irrigation was scheduled using soil volumetric water content measured by soil moisture sensors. A center pivot VRI system was employed to deliver irrigation water according to the VRI prescription. Grain yield, irrigation water use, and irrigation water productivity in the VRI treatment were determined and compared with that in a uniform-rate irrigation (URI) treatment. Results showed that the grain yield and irrigation water productivity between the VRI and URI treatments were not statistically different with both corn and soybean crops. The VRI management significantly reduced the amount of irrigation water by 22% in corn and by 11% in soybean (p = 0.05). Adoption of VRI management could improve irrigation water use efficiency in the Mississippi Delta. Keywords: Soil electrical conductivity, Soil moisture sensor, Variable rate irrigation, Water management.
Routing, Wavelength and Time-Slot Assignment Approaches with Security Level in QKD-Enabled Optical Networks
Authors: Ma Weike , Liu Ling , Chen Bowen , Gao Mingyi , Chen Hong , Wu Jinbing
Published: February 2021

We develop two routing, wavelength, time-slot assignment (RWTA) approaches to improve overall network security performance and quantum key utilization by considering different security levels. Simulation results show the effectiveness of our proposed approaches.
High-resolution holographic 3D display method by direct coding of light field images
Authors: Liu Zimo , Yao Jianyun , Xu Fuyang , Yang Xin , Song Qiang , Li Yong
Published: February 2021

Direct coding of light field images for high-resolution holographic 3D display is proposed. Two high-resolution holograms for static 3D display and multi-view dynamic 3D display are calculated and optically reconstructed to approve the validate of proposed method.
Dynamic Secret-Key Assignment in QKD Access Networks (QAN)
Authors: Wang Hua , Zhao Yongli , Yu Xiaosong , Chen Liquan , Zhang Jie
Published: February 2021

We propose an architecture of QKD access networks (QAN) and a dynamical secret-key assignment (DSA) scheme for multiple edge users. Simulation results show that the DSA can effectively provide secret keys with less queuing time.
Ultra-compact Sensor Based on a single-cavity dual-mode Photonic Crystal Nanobeam for Simultaneous Detection of Relative Humidity and Temperature
Authors: Yang Ying , Sun Fujun , Wang Zheng , Tian Huiping
Published: February 2021

We first propose a sensor based on a photonic crystal nanobeam cavity supporting air mode and dielectric mode to simultaneously detect relative humidity and temperature. High sensitivity, strong anti-interference ability, and compact footprint are achieved.
Phase Offset Train-Sequence Method for Nonlinear Frequency Division Multiplexing
Authors: Gao Xianwei , Fu Yixin , Fang Xi , Zhao Cheng , Ding Ding
Published: February 2021

In this paper, we present a transmission model and propose a training sequence based frequency-domain equalization method for nonlinear frequency division multiplexing. Theoretical analysis is validated by simulations and results indicate that the proposed method exhibits a better estimation accuracy compared with the pre-compensation method.
High-power S-Band EDFA using standard Erbium doped fiber and double pass configuration
Authors: Chung Dicky , Tsang K.S. , Li Ming , Wong Sonia Shuk Chu , Yeung Abby , Ho Victor , Man Ray
Published: February 2021

This study illustrates the performance of a 26dBm S-Band amplifier with a two-stage configuration. Stage one is a double pass EDFA with narrowband filter. Stage two is a single pass EDFA with a mid-stage narrowband filter.
Photodiode Array-based Angular Estimator and It’s Application in Indoor Positioning with Single LED Lamp
Authors: Guo Xin , Liu Jihong , Bai Yuantao , Zhu Luying , Zhang Ke , Liu Yanfei
Published: February 2021

An angular estimator based on photodiode array is proposed. The experimental results in positioning with single LED show that the angular of incident light relative to the receiver can be estimated with small errors.
A Probabilistic Shaped Adaptive Hierarchical QAM Scheme for Elastic Optical Network
Authors: Xu Hui , Wang Yongjun , Liu Xinyu , Xin Xiangjun , Gao Kaiqiang
Published: February 2021

A probabilistic shaped adaptive hierarchical 12QAM (PS-AH-12QAM) scheme is proposed. Simulation results show that the proposed scheme obtains better BER performance than traditional adaptive hierarchical 16QAM (AH-16QAM).
Double-Light-Path Multiplexing Enabled Light Shaping Efficiency Enhancement for Digital Micromirror Device
Authors: Zhu Lei , Cao Zizheng , Fu Songnian , Wang Yuncai , Qin Yuwen
Published: February 2021

In order to solve the low conversion efficiency (theoretically less than 10%) of digital micromirror device (DMD) based light shaping, we demonstrate a double-light-path multiplexing technique to double corresponding light shaping efficiency.
FrFT based blind chromatic dispersion estimation mitigating large DGD induced uncertainty
Authors: Zhou Guozi , Jiang Ting , Xiang Yating , Tang Ming
Published: February 2021

We developed a robust chromatic dispersion estimation (CDE) algorithm based on the Fractional Fourier Transform and BP neural network against large DGD disturbances. Within 100ps/nm CDE accuracy was achieved with 50-130ps DGD variation.
In-line nonlinearity compensation utilizing data-driven phase modulators for long haul optical fiber communication
Authors: Pan Yan , Yan Lianshan , Yi Anlin , Jiang Lin , Pan Wei , Luo Bin
Published: February 2021

A data-driven in-line scheme is proposed to suppress fiber nonlinearity, and transmission performance of 32-GBaud QPSK/16QAM is investigated. Results show that more than 50% transmission distance improvement can be achieved. 
Join Modulation Format Identification and OSNR Monitoring Assisted by Intensity and Differential-Phase Features
Authors: Feng Jiacheng , Yan Lianshan , Jiang Lin , Yi Anlin , Pan Yan , Pan Wei , Luo Bin
Published: February 2021

A joint modulation format identification and OSNR monitoring scheme is proposed. 100% identification accuracies are achieved and maximum mean monitoring errors are respectively 0.19dB, 0.17dB, 0.26dB, 0.40dB, 0.85dB, and 0.64dB for all mainstream formats (PDM-QPSK/-8PSK/-8QAM/-16QAM/-32QAM/-64QAM).
Nonlinear Fourier Domain PMD Impairment Model for Nonlinear Frequency Division Multiplexing
Authors: Zhang Xulun , Xi Lixia , Zheng Zibo , Zhang Nannan , Wei Jiacheng , Du Shucheng , Zhang Wenbo , Zhang Xiaoguang
Published: February 2021

A nonlinear Fourier domain PMD impairment model is first proposed and verified. It can help to better understand the effects of PMD, and provide guidance for the design of corresponding equalization scheme.
High-efficient Equalizer based on the simplified Deep Neural Network for 56Gb/s/λ PAM-4 in C-band 10G DML-based Short reach system
Authors: Xi Yu , Wang Chenyu , Miao Xin , Bi Meihua , Hu Weisheng
Published: February 2021

We demonstrate a superior DNN equalizer to improve performance of DML-based short-distance optical transmission systems. The corresponding results show that this scheme can achieve low bit-error-rate in C-band and exhibit excellent nonlinear suppression capabilities.
A new LightGBM-based Equalizer enabled high-capacity PAM-4 and NRZ transmission in the 10-G class system
Authors: Wang Chenyu , Miao Xin , Xi Yu , Bi Meihua , Hu Weisheng
Published: February 2021

A powerful LightGBM-based equalizer is presented to improve the performance of bandwidth-limited IMDD system. Compared with the common 37-taps DFE, it can achieve the sensitivity by 2 dB at the HD-FEC limit.
Wideband and Low-Spur Doppler Simulator Based on Photonic Microwave I/Q Up-Converter
Authors: Gao Yongsheng , Wang Xinyuan , Wang Wuying , Chen Bo
Published: February 2021

A Doppler simulator based on photonic microwave I/Q up-converter is proposed using an PDM-DPMZM, which features the advantages of tunable operating frequency, transparent modulation bandwidth and high spur suppression.
Optimal two-mode collective attacks against unidimensional two-way continuous-variable quantum key distribution
Authors: Bian Yiming , Huang Luyu , Zhang Yichen , Yu Song
Published: February 2021

We report the security analysis of unidimensional two-way continuous-variable quantum key distribution protocol against two-mode collective attacks, where the optimal eavesdropping strategy is given by a two-mode attack with appropriate separable correlations.
Wideband Coherent Optical RF Channelizer With Image-Reject Down-Conversion
Authors: Chen Bo , Fan Yangyu , Gao Yongsheng
Published: February 2021

Channelization receiver can effectively manipulate wideband RF signals. An microwave photonic channelizer based on coherent optical frequency combs and image-reject mixer is proposed and can receive the RF signal with bandwidth of 5 GHz.
Arbitrary Waveform Generation with a Doubled Bandwidth based on an IQ Photonic Digital-to-analog Converter
Authors: Li Jiading , Xue Xiaoxiao , Li Shangyuan , Yu Xianbin , Wang Jian , Zheng Xiaoping
Published: February 2021

A novel method of photonic arbitrary waveform generation is presented, which combines photonic digital-to-analog conversion technique and IQ upconversion. A 2-bit prototype is built experimentally and a linear frequency-modulated waveform with a bandwidth of 4 GHz is synthesized with a 2-GHz baseband width.
Photonic-Enabled Self-Interference Cancellation for High-Frequency Broadband Frequency Modulation Continuous- Wave Rader
Authors: Xing Yunlu , Li Shangyuan , Xue Xiaoxiao , Zheng Xiaoping
Published: February 2021

A photonic-enabled RF self-interference cancellation system is proposed for frequency modulated continuous-wave (FMCW) radars. Simulation results show that it can realize 23-dB cancellation depth over 4-GHz instantaneous bandwidth.
Terahertz Frequency Comb Based on Frequency-Locked Coherent Smith-Purcell Radiation
Authors: Lin Yuechai , Liu Fang , Li Jinyu , Huang Yidong
Published: February 2021

Via velocity modulation by utilizing localized surface plasmon, a method of producing picosecond free-electron bunch train and further generating terahertz frequency comb based on frequency-locked coherent Smith-Purcell radiation is proposed and studied numerically.
LCOS based Optical Wireless Communication System for Multicast Service
Authors: You Quan , Zheng Guoxing , Xiao Xi , Yu Shaohua
Published: February 2021

We propose an indoor optical wireless communication system supporting multicast service by using a liquid crystal spatial light modulator. 10-Gb/s on-off keying data is transmitted over 2-m free space for up to three users.
Dynamic Resource Management for Indoor Hybrid Visible Light Communications and WiFi Networks
Authors: Yang Liwei , Luo Yuqi , Li Zelin , Zhang Qi , Zhang Wenjie
Published: February 2021

Dynamic resource management is proposed to realize the coexistence of visible light communications and WiFi systems. Simulation results show that the proposed scheme works well for managing the resources of the hybrid networks.
Ultracompact on-chip spectrometer based on high-index-contrast grating
Authors: Zheng Zekun , Cui Kaiyu , Cai Xusheng , Zhu Hongbo , Xiong Jian , Huang Yidong , Zhang Wei , Feng Xue , Fang Liu
Published: February 2021

We proposed an ultracompact on-chip spectrometer based on high-index-contrast grating. Simulation results show that, optical spectra are reconstructed with resolution as high as 2 nm and a compact footprint of only 60 μm ×48 μm.
Microlens Array based on SiNx Metasurface for CMOS Image Sensor
Authors: Zhang Yu , Liu Fang , Huang Yidong
Published: February 2021

Different from traditional microlens array requiring complicated fabrication processes, SiNx metasurface microlens array is designed, which has simplified the manufacturing process and indicates the ability of light beam focusing spanning from visible to near-infrared region.
Design and optimization of heterogeneous Few-mode Multi-core Fiber with graded-index profile and trench/rod assisted
Authors: Dai Yong , Wang Yong-Jun , Tian Feng , Zhang Qi , Xin Xiangjun
Published: February 2021

We have proposed a design scheme of heterogeneous multi-core and few-mode fiber, which can improve the of RCMF, etc performance by combining rod-assisted and trench-assisted, as well as using a graded refractive index profile.
In-Fiber Nonreciprocal Light Transmission Based on Parity-Time Symmetry With Coupled Fabry-Perot Resonators
Authors: Li Zheng , Zhang Jiejun , Yao Jianping
Published: February 2021

Nonreciprocal in-fiber light transmission based on parity-time symmetry using a pair of Fabry-Perot resonators is demonstrated. An isolation up to 17.2 dB is achieved between the forward and backward propagating directions.
Neural network for the inverse design of polarization-maintaining few-mode panda-type ring-core fiber
Authors: Teng Fei , Jin Zhen , Chen Shuo , Tian Huiping
Published: February 2021

We propose a method to achieve the inverse design of polarization-maintaining few-mode panda-type ring-core fiber by using neural network. This method benefits high-precision fiber design and provides the optimum fiber in a few minutes.
Precoding Probabilistically Shaped DMT Transmission for Underwater Optical Wireless Communication
Authors: Hong Xiaojian , Du Ji , Wang Yuan , Zhang Guowu , Zhang Junwei , Fei Chao
Published: February 2021

We proposed and experimentally demonstrated precoding probabilistically shaped 64QAM-DMT transmission for underwater optical wireless communication systems in different underwater conditions. Over 19% capacity enhancement and over 4dB received optical power sensitivity improvement can be achieved.
A Low-loss 4-channel Arrayed Waveguide Grating Using Parabolic Tapered Waveguides
Authors: Fu Jia , Chen Yuanxiang , Sun Shangbin , Han Ying , Huang Yongtao , Lin Shangjing , Yang Leijing , Yu Jianguo
Published: February 2021

We present a low-loss 4-channel AWG based on parabolic tapered waveguides. The parabolic tapered waveguides can effectively reduce the average insertion loss from 5 dB to 1.2 dB and improve the 3 dB bandwidth from 15 nm to 16.3 nm.
Refractive Index Sensitivity Characteristics at the Dispersion Turning Point of the Single-solid-hole Microfiber-based Modal Interferometer
Authors: Xu Shengyao , Zhang Yang’an , Yuan Xueguang , Huang Yongqing
Published: February 2021

We demonstrate an ultrasensitive broadband refractometer based on tapered single-solid-hole fiber operating near the dispersion turning point. Compared with SMF-based microfiber, the operation bandwidth of probing wavelength for ultrahigh sensitivities is broadened by 500 nm.
Mitigating SRS in high-power fiber laser systems using CTFBGs for longer delivery distance
Authors: Tian Xin , Wang Meng , Hu Qihao , Zhao Xiaofang , Wang Zefeng
Published: February 2021

We research here on the mitigation of the stimulated Raman scattering in high-power fiber laser systems by chirped and tilted fiber Bragg gratings (CTFBGs) for longer laser delivery distance. A broadband and high rejection CTFBG is carefully designed and fabricated and have been demonstrated to have a good filtering effect on Raman signal, which is helpful for increasing the laser delivery distance.
Non-Zero Dispersion-Shifted and Dispersion-Flatted Air-Core Ring Fiber for OAM Mode
Authors: Zhao Wenqian , Geng Wenpu , Wang Yingning , Fang Yuxi , Bao Changjing , Ren Yongxiong , Zhang Weigang , Zhang Hao , Pan Zhongqi , Yue Yang
Published: February 2021

We propose and design a non-zero dispersion-shifted air-core ring fiber for OAM mode. A 5.439-ps/(nm·km) low dispersion at 1550 nm with < 1.332 ps/(nm·km) dispersion variation for OAM1,1 mode is achieved across the C band.
Yb-doped F-rich aluminophosphosilicate LMA-25/400-YDF laser fiber with high efficiency and excellent stability
Authors: Leng Xiaoxiao , Ni Li , Peng Kun , Yu Juan , Wang Xiaolong , Dai Xiaojun , Xiang Heng , Lin Aoxiang
Published: February 2021

Yb-doped F-rich aluminophosphosilicate LMA-25/400-YDF laser fiber was fabricated by chelate precursor doping technique. 3.03 kW@1080nm laser output was achieved in an oscillator configuration with an optical-to-optical efficiency of 71.5% and shown excellent stability.
Digital Coherent Quantum Noise Stream Cipher over 300km Span Fiber without Intermediate Amplifier
Authors: Lei Chao , Zhang Jie , Li Yajie , Zhao Yongli , Wang Kai , Liu Shoudong , Wang Bo , Gao Hang , Li Junjia
Published: February 2021

This paper first reports a digital coherent quantum noise stream cipher experiment over 300km fiber without intermediate amplifiers. Results show the system can carry 10.2Tbit/s⸱km data, which is historical high in the digital coherent context.
The first demonstration of high-speed LiNbO3 thin-film optical modulators operating at the wavelength of 2 μm
Authors: Pan Bingcheng , Hu Jinyao , Huang Yishu , Song Lijia , Wang Jingyi , Chen Pengxin , Liu Liu , Dai Daoxin
Published: February 2021

We demonstrate the first high-speed LiNbO3 thin-film optical modulators operating at 2 μm wavelength. The measured L is 3.67 V·cm, and the electro-optic bandwidth is > 22 GHz (beyond the measurement limit of photodetector).
High Efficiency and Low Voltage Actively Q-Switched Yb-doped Waveguide Lasers Using a Liquid Crystal Modulator
Authors: Lei Xinyue , Hao Lu , Firth Josiah , Ladouceur Francois , Silvestri Leonardo , Fuerbach Alex
Published: February 2021

We present a high efficiency actively Q-Switched laser using a liquid crystal modulator. The Q-switched lasers with a pulse width of 15.6 ns and a peak power of 110 W are achieved at 1030 nm.
A Frequency-Modulated Lidar System Based on an Optical Frequency Shifting Loop
Authors: Li Lu , Liu Ce , Zhang Yamei , Pan Shilong
Published: February 2021

A frequency-modulated lidar is demonstrated based on an optical frequency shifting loop (OFSL), and a multi-chirped optical LFM signal is generated with the OFSL which is employed for simultaneous distance and velocimetry measurement.
Large-Scale High-Density Optical Interconnects
Authors: Chen Zhangyuan , Yang Chuanchuan , Hua Nan , Guo Bingli , Li Juhao , Huang Junbin , Zheng Xiaoping , Huang Shanguo
Published: February 2021

We will show some works in large-scale high-density optical interconnects for DCs and supercomputers, including high-density SDM and SWDM transmission, low-complexity equalization, and optical switching for low latency and efficient adaption to traffic fluctuation.
Waveguide Integrated Magneto-Optical Isolators on Silicon Nitride Platforms
Authors: Yan Wei , Yang Yucong , Qin Jun , Deng Longjiang , Bi Lei
Published: February 2021

We report high-performance magneto-optical isolators and circulators on silicon nitride platforms for TM (TE) polarizations showing 32 dB(30 dB) isolation ratio, 2.3 dB(3 dB) insertion loss and -32 dB(-30 dB) minimum crosstalk.
SNR Enhanced Microwave Photonic Radar based on LFM Pulse with High Extinction Ratio
Authors: Liu Sijie , Zhang Jiangtao , Zhu Dan , Wang Xiangchuan , Pan Shilong
Published: February 2021

A signal to noise ratio (SNR) enhanced radar based on linear frequency modulation pulse is proposed. The SNR of de-chirped signal is increased by 5 dB when the extinction ratio is improved by 20 dB.
Lab for Micro/Nanoscale Sensors and Systems
Authors: Yang Daquan
Published: February 2021

The ability to sense dynamic biochemical reactions is particularly crucial for wide range of applications. Optical-microcavities based label-free biosensors are renowned for ultrahigh sensitivities, and the detection limit has reached to a single nanoparticle/molecule level.
High-Speed Short Reach Optical Communications: Technological Options and Challenges
Authors: Pang Xiaodan , Udalcovs Aleksejs , Schatz Richard , Popov Sergei , Ozolins Oskars
Published: February 2021

We review the current trend in the research and development of short reach optical communications. Typical application scenarios with corresponding technological options are discussed, and an outlook on the challenges from different aspects are presented.
Fiber-tip polymer microcantilever for hydrogen sensing
Authors: Xiong Cong , Liao Changrui , Zhu Meng , Gan Zongsong , Wang Yiping
Published: February 2021

A fiber-tip polymer microcantilever hydrogen sensor is realized by using two-photon polymerization and magnetron sputtering. It exhibits a high hydrogen sensitivity of -2 nm/% and a short response time of 13.5 s.
Hollow-core PCF for molecular optics and quantum information
Authors: Benabid F.
Published: February 2021

We review the recent development on hollow-core photonic crystal fiber and their application in molecular trapping and in the generation of photon pair and single-photon.
Dual-band Airy Beams Enabled Full Duplex Free-space Photonic Interconnection
Authors: Fu Songnian , Zhao Xuesong , Zhu Lei , Wang Yuncai , Qin Yuwen
Published: February 2021

We experimentally demonstrate a proof-of-concept dual-band 2D Airy beams enabled 100 Gbps full duplex free-space photonic interconnection over 40 cm free-space link with a receiver sensitivity of -17.3 dBm at bit error ratio of 1e-9.
Manipulating Circularly Polarized Emission of Classical and Nonclassical Light with Plasmonic Metasurfaces
Authors: Ding Fei
Published: February 2021

The capability of controlling the state of polarization is of vital importance in fundamental sciences and practical applications We demonstrate the strategy for manipulating circularly polarized emission of classical and nonclassical light with plasmonic metasurfaces.
Enlarging strain dynamic range of quasi-distributed acoustic sensing with interleaved identical chirped pulses
Authors: Wang Zitan , Jiang Jialin , Wang Zinan , Rao Yunjiang
Published: February 2021

A novel interleaved identical chirped pulses (IICP) method to enlarge the strain dynamic range of quasi-distributed acoustic sensing system is proposed, on the basis of pulse compression Φ-OTDR with coherent detection.
Fading-free Block-wise PAM Signal Transmission with Direct Detection Based on Alamouti Coding and DDMZM
Authors: Zhu Yixiao , Li Longsheng , Miao Xin , Yin Longjie , Chen Xi , Hu Weisheng
Published: February 2021

We propose and experimentally demonstrate fading-free direct detection transmission of PAM signal enabled by Alamouti coding and dual-drive MZM. After 80km SSMF transmission, 32Gbaud PAM-4/6/8 signal can achieve KP4, 7% and 20% FEC thresholds, respectively.
An Improved Volterra Nonlinear Equalizer for 50 Gb/s PAM4 IM/DD Transmission with 10G-Class Optics
Authors: Zhang Qianwu , Duan Shuaihang , Wang Zicong , Jiang Yuntong , Li Pu , Cao Bingyao , Wu Yating
Published: February 2021

An improved Volterra nonlinear equalizer (VNLE) for 50 Gb/s PAM4 IM/DD Transmission with 10G-Class optics is experimentally demonstrated and show >2 dB sensitivity improvement compared to the 3rd-order VNLE and saves the multiplication by 17%.
Machine Learning in the Optical Domain Enabled by Reservoir Computing
Authors: Pachnicke Stephan , Li Shi
Published: February 2021

Photonic reservoir computing can substitute digital signal processing and equalize linear and nonlinear impairments. Especially photonic integrated variants e.g. ring-resonator based devices may become attractive. Feasibility and limitations are evaluated, and potential solutions are proposed.
Silicon Optical Phased Array Side Lobe Suppression Based on an Improved Genetic Algorithm
Authors: Liu Qixin , Lu Youxi , Wu Beibei , Jiang Ping , Cao Rui , Feng Junbo , Guo Jin , Jin Li
Published: February 2021

We experimentally demonstrate a 1×128 optical phased array, and an improved genetic algorithm is proposed to efficiently increase the side lobe suppression ratio (SLSR). The measured SLSR can achieve 20 dB with a divergence angle of 0.16°.
Simulation and Experimental Demonstration of Novel In-service Correlation OTDR using Single-period Signal Extension
Authors: Fan Xintao , Du Jinhao , Yang Tao , Shi Sheping , Shangguan Yangguang
Published: February 2021

We propose a novel efficient scheme for in-service correlation OTDR signal processing, which reduces the probe time to one third of the original correlation OTDR and decreasing processing complexity by using single-period signal extension.
Direct Detection of 100-Gb/s PAM-8 Signals Over 80-km Fiber Transmission for DCI and Metro Networks
Authors: Luo Ming , He Zhixue , Yang Chao , Li Haibo , Yu Shaohua
Published: February 2021

We experimentally demonstrate a direct detection scheme in DCI and metro networks to generate 43-GBaud PAM-8 signals in one single-driver MZM and transmit over 80-km SSMF at C band without optical inline dispersion compensation.
High-speed partial-depleted-absorber photodiode based on GaAs/AlGaAs at 850nm wavelength
Authors: Xie Zhiyang , Zhou Zhiqi , Li Linze , Ji Haiming , Chen Baile
Published: February 2021

We report a high-speed partial-depleted-absorber photodiode based on GaAs/AlGaAs with 3-dB bandwidth of 17.9 GHz at 850nm wavelength. Device exhibits responsivity of 0.466 A/W and dark current of 1.09 pA under −3 V bias.
Structured Illumination Microscopy Based on Silicon Nitride Photonic Integrated Circuits
Authors: Deng Qingzhong , Arisev Ongun , Kouznetsov Dmitry , Hasan Mahmud ul , Vos Rita , Van Dorpe Pol , Verellen Niels
Published: February 2021

A photonic integrated circuit chip architecture is proposed and fabricated to implement super-resolution structured illumination microscopy. The working concept is introduced with some preliminary results, followed by a pros and cons discussion.
Micro-Transfer-Printing for III-V/Si PICs
Authors: Zhang Jing , Op de Beeck Camiel , Haq Bahawal , Goyvaerts Jeroen , Cuyvers Stijn , Kumari Sulakshna , Muliuk Grigorij , Hermans Artur , Gocalinska Agnieszka , Pelucchi Emanuele , Corbett Brian , Trindade Antonio Jose , Bower Chris , Van Campenhout Joris , Lepage Guy , Verheyen Peter , Kuyken Bart , Van Thourhout Dries , Morthier Geert , Baets Roel , Roelkens Gunther
Published: February 2021

Micro-transfer-printing (µTP) enables the intimate integration of a variety of III-V opto-electronic components on silicon photonic integrated circuits (Si PICs). It allows for the scalable manufacturing of complex III-V/Si PICs at low cost.
Spatio-temporal focal spot characterization and modeling of the NIF ARC kilojoule picosecond laser
Authors: Williams Wade H. , Crane John K. , Alessi David A. , Boley Charles D. , Bowers Mark W. , Conder Alan D. , Di Nicola Jean-Michel G. , Di Nicola Pascale , Haefner Constantin , Halpin John M. , Hamamoto Mathew Y. , Heebner John E. , Hermann Mark R. , Herriot Sandrine I. , Homoelle Doug C. , Kalantar Daniel H. , Lanier Thomas E. , LaFortune Kai N. , Lawson Janice K. , Lowe-Webb Roger R. , Morrissey Francis X. , Nguyen Hoang , Orth Charles D. , Pelz Lawrence J. , Prantil Matthew A. , Rushford Michael C. , Sacks Richard A. , Salmon J. Thaddeus , Seppala Lynn G. , Shaw Michael J. , Sigurdsson Ronald J. , Wegner Paul J. , Widmayer C. C. , Yang Steven T. , Zobrist Thomas L.
Published: February 2021

The advanced radiographic capability (ARC) laser system, part of the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory, is a short-pulse laser capability integrated into the NIF. The ARC is designed to provide adjustable pulse lengths of

∼

1

−

38

p
s

in four independent beamlets, each with energies up to 1 kJ (depending on pulse duration). A detailed model of the ARC lasers has been developed that predicts the time- and space-resolved focal spots on target for each shot. Measurements made to characterize static and dynamic wavefront characteristics of the ARC are important inputs to the code. Modeling has been validated with measurements of the time-integrated focal spot at the target chamber center (TCC) at low power, and the space-integrated pulse duration at high power, using currently available diagnostics. These simulations indicate that each of the four ARC beamlets achieves a peak intensity on target of up to a few

10

18

W

/

c
m

2

.
Parity-time symmetric frequency-tunable optoelectronic oscillator based on a Si3N4 microdisk resonator
Authors: Liu Pengcheng , Zheng Pengfei , Yang Huimin , Lin Dongdong , Hu Guohua , Yun Binfeng , Cui Yiping
Published: February 2021

The optoelectronic oscillator (OEO) generates low-phase noise and high-frequency microwave signals thanks to a high Q-factor cavity with long and low-loss fiber delay. Traditionally, for the desired mode selection from the ultradense cavity modes, a narrowband electrical filter is needed, whose frequency tuning is very limited. On the other hand, for a tunable OEO offered by a microwave photonic filter (MPF), a paradox existed between the large number of cavity modes and the wide MPF bandwidth. Here, we achieve a tunable OEO using the mode-selection mechanism of parity-time symmetry, which overcomes the paradox. A high Q-factor silicon nitride microdisk resonator (

S
i

3

N

4

MDR) is introduced to achieve frequency filtering and tuning. Moreover, the experimental results reveal that the tunable OEO generates a signal range from 3 GHz to 20 GHz with a phase noise about

−

120

d
B
c

/

H
z

at a 10 kHz offset frequency.
10  kHz 2D thermometry in turbulent reacting flows using two-color OH planar laser-induced fluorescence
Authors: Hsu Paul S. , Jiang Naibo , Lauriola Daniel , Grib Stephen W. , Schumaker Stephen A. , Caswell Andrew W. , Roy Sukesh
Published: February 2021

10 kHz two-color OH planar laser-induced fluorescence (PLIF) thermometry was demonstrated in both laminar Hencken flames and turbulent premixed jet flames using two injection-seeded optical parametric oscillators (OPOs) pumped by a high-speed three-legged burst-mode laser. The two burst-mode OPOs generate

∼

5

m
J

/

p
u
l
s
e

at 282 nm and 286 nm to excite the

Q

1

(

5

)

and

Q

1

(

14

)

transitions of the

A

2

Σ
+

←

X

2

Π

(1,0) system of OH, respectively. PLIF images were collected simultaneously from each of the two transitions and ratios of intensities from the two images were used to determine local temperatures. Analyses of flame curvature, temperature, and the correlation in time of these two quantities are also discussed. The results from this work are promising for the use of this technique in more complex flow environments and at, potentially, even higher repetition rate.
Passive polarimetric imaging of millimeter and terahertz waves for personnel security screening
Authors: Cheng Yayun , Qiao Lingbo , Zhu Dong , Wang Yingxin , Zhao Ziran
Published: February 2021

Passive millimeter and terahertz wave imaging is a powerful way for personnel security inspection and scene monitoring. The existing systems usually have a single polarization mode. To obtain more information, polarimetric imaging has been preliminarily explored recently. However, there is no work exhibiting high-performance polarimetric imaging to analyze and interpret polarization characteristics. In this Letter, we report on the development of a W-band passive polarimetric imaging system for human body screening and present the polarization characteristics analysis of several typical scenarios. The experimental system has a spatial resolution of better than 2 cm at 2.5 m distance and has a thermal sensitivity of better than 0.3 K. The system can display polarization properties of human bodies and concealed objects. The experimental results demonstrate that passive polarimetric imaging has a great potential for object contrast enhancement, detection, segmentation, and recognition.
Limiting the incident NA for efficient wavefront shaping through thin anisotropic scattering media
Authors: Jin Hyungwon , Hwang Byungjae , Lee Sangwon , Park Jung-Hoon
Published: February 2021

Wavefront shaping holds great potential for high-resolution imaging or light delivery either through or deep inside living tissue. However, one of the biggest barriers that must be overcome to unleash the full potential of wavefront shaping for practical biomedical applications is the fact that wavefront shaping, especially based on iterative feedback, requires lengthy measurements to obtain useful correction of the output wavefront. As biological tissues are inherently dynamic, the short decorrelation time sets a limit on the achievable wavefront shaping enhancement. Here we show that for wavefront shaping in thin anisotropic scattering media such as biological tissues, we can optimize the wavefront shaping quality by simply limiting the numerical aperture (NA) of the incident wavefront. Using the same number of controlled modes, and therefore the same wavefront measurement time, we demonstrate that the wavefront shaped focus peak to background ratio can be increased by a factor of 2.1 while the energy delivery throughput can be increased by a factor of 8.9 through 710 µm thick brain tissue by just limiting the incident NA.
Spintronic Terahertz Emission with Manipulated Polarization [STEMP]
Authors: Wu Xiaojun
Published: February 2021

Circularly polarized broadband terahertz waves have been successfully generated from ferromagnetic metals-based and heavy metal or topological insulator combined heterostructures. The chirality, azimuthal angle and ellipticity of the terahertz beams can also be arbitrarily manipulated.
Impact of RNA Melting on Hydrating Water Structure Mapped by Femtosecond 2D-IR Spectroscopy
Authors: Fingerhut Benjamin P. , Kundu Achintya , Schauss Jakob , Elsaesser Thomas
Published: February 2021

We discern hydration geometries around the sugar-phosphate-backbone of an RNA double helix at the molecular level. RNA disordering upon melting is connected with a transition from ordered water structures towards local phosphate group hydration shells.
Ultrafast Protein Dynamics Probed by Site Specific Transient IR Spectroscopy
Authors: Hall Christopher R. , Collado Jinnette Tolentino , Iuliano James N. , Adamczyk Katrin , Lukacs Andras , Greetham Gregory M. , Sazanovich Igor , Tonge Peter J. , Meech Stephen R.
Published: February 2021

Ultrafast spectroscopy can measure real-time protein dynamics, but yields limited structural information. Here we use unnatural amino acid substitution to place an IR absorber at specific locations in light activated proteins. Ultrafast pump - transient IR probe spectroscopy then yields unique site-specific data on protein structural dynamics.
Core-level Time Resolved Spectroscopy of Photoelectron Circular Dichroism in Fenchone
Authors: Faccialà D. , Devetta M. , Beauvarlet S. , Besley N. , Calegari F. , Callegari C. , Catone D. , Cinquanta E. , Ciriolo A. , Colaizzi L. , Coreno M. , Crippa G. , De Ninno G. , Di Fraia M. , Galli M. , Garcia G. , Mairesse Y. , Negro M. , Plekan O. , Powis I. , Geetha P. Prasannan , Prince K. , Pusala A. , Stagira S. , Turchini S. , Ueda K. , You D. , Zema N. , Nahon L. , Blanchet V. , Vozzi C.
Published: February 2021

We measured the chiral relaxation of photoexcited Fenchone at the Carbon K-edge. Our results demonstrate that ultrafast chiral dynamics can be probed using core level spectroscopy with circularly polarized free-electron laser pulses.
Molecular dissociation driven by plasmonic near-fields of shaped mid-infrared pulses: Impact of down-chirping
Authors: Morichika Ikki , Ashihara Satoshi
Published: February 2021

We demonstrate vibrationally-mediated dissociation of condensed-phase molecules by employing intense plasmonic near-fields of temporally-shaped mid-infrared pulses. Furthermore, we numerically investigate the impact of down-chirping on the plasmon-enhanced vibrational ladder climbing. © 2020 The Author(s)
Ultrafast solvation dynamics of dimethyl sulfoxide induced by excited-state intramolecular proton transfers
Authors: Jen Myungsam , Lee Sebok , Pang Yoonsoo
Published: February 2021

Excited-state intramolecular proton transfers of 1,2-dihydroxyanthraquinone in dimethyl sulfoxide (DMSO) were extensively investigated by femtosecond stimulated Raman spectroscopy, where ultrafast solvation dynamics of νS=O and νCSC of DMSO between free and aggregated forms were observed.
Intramolecular charge transfer state of “push-pull” dyes probed by femtosecond stimulated Raman spectroscopy
Authors: Lee Sebok , Jen Myungsam , Jang Taehyung , Pang Yoonsoo
Published: February 2021

Two distinct Raman spectra of “push-pull” dyes, DCM and LD 688, in the locally-excited and charge-transfer states separately obtained from time-resolved Raman measurements, showed the existence of twist intramolecular charge transfer state in polar solvents.
Energy Transfer pathways in PSI-LHCI probed by Two-Dimensional Electronic Spectroscopy
Authors: Russo Mattia , Casazza Anna Paola , Cerullo Giulio , Santabarbara Stefano , Maiuri Margherita
Published: February 2021

By combining broadband two-dimensional electronic spectroscopy and global analysis, we temporally and spectrally resolve ultrafast energy transfer processes in the isolated Photosystem I-Light Harvesting Complex I (PSI-LHCI) supercomplex of spinach with open reaction centers.
Megahertz-Rate Pump–Probe Jitter and Drift Characterization at a Hard X-ray Free-Electron Laser
Authors: Letrun R. , Sato T. , Kirkwood H.J. , Liu J. , Grünert J. , Mancuso A.P.
Published: February 2021

We report on the development and implementation of single-shot hard X-ray/optical cross-correlation at the European X-ray free-electron laser for characterization of timing jitter and drift at megahertz rate.
Ultrafast Spectroscopy Reveals Structural Heterogeneity of Artificial Light-Harvesters
Authors: Pshenichnikov Maxim S. , Kriete Björn
Published: February 2021

Ultrafast 2D spectroscopy is combined with single-object spectroscopy to disentangle the structural heterogeneity of an artificial light-harvester. The dynamically (~50 fs timescale) fluctuating environment governs the system’s properties, but not structural variations among different harvesters.
Probing Delayed C–I Bond Fission in the UV Photochemistry of 2-Iodothiophene with Core-to-Valence Transient Absorption Spectroscopy
Authors: Toulson Benjamin W. , Borgwardt Mario , Faccialà Davide , Neumark Daniel M. , Leone Stephen R. , Gessner Oliver
Published: February 2021

The UV photodissociation dynamics of 2-iodothiophene are monitored by an XUV probe pulse that promotes iodine 4d core-to-valence transitions. Absorption changes from molecular iodine species conclusively show that dissociation requires up to ~1 picosecond.