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Real-time one-step phase locking with physics-informed phase estimator in multichannel coherent beam combining 认领 引用
1
作者 Yong Wu Guoqing Pu +3 位作者 Jiajin Wang Zhiwei Fang Weisheng Hu Lilin Yi 《Advanced Photonics Nexus》 CSCD 2026年第3期214-221,共8页
Coherent beam combining(CBC)is an effective approach to surpass the power limitations of single fiber lasers,where precise phase control is essential.As the demand for higher power and more channels increases,achievin... Coherent beam combining(CBC)is an effective approach to surpass the power limitations of single fiber lasers,where precise phase control is essential.As the demand for higher power and more channels increases,achieving faster phase control becomes increasingly challenging for traditional methods.We propose a scheme termed physics-informed phase estimator(PIPE),which can be considered as a graybox model merging locking of optical coherence by single-detector electronic-frequency tagging(LOCSET)and a well-trained neural network,that infers the phase differences between channels from the temporal intensity of the combined beam after assigning unique frequency tags to each sub-beam.Real-time onestep phase locking with a single photodetector is experimentally demonstrated in a four-channel CBC system by incorporating PIPE,achieving nearly an order-of-magnitude improvement in convergence time over LOCSET,with a residual phase ofλ∕45 and a combining efficiency of 98%.The results indicate that PIPE offers a promising solution for substantially enhancing phase control bandwidth in future CBC systems,especially for filled-aperture CBC systems. 展开更多
关键词 coherent beam combining phase locking physics-informed phase estimator neural network
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Manipulation of electrolyte locking-desolvating kinetics enabling scalable flame-retardant polymer protector for thermally safe lithium metal batteries 认领 引用
2
作者 Liu Yang Yisha Wang +4 位作者 Haoteng Sun Mingtong Zhang Tianxiang Yang Hanqi Zhang Jixin Zhu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期15-24,I0002,共10页
Lithium metal batteries(LMBs)offer remarkable energy density and theoretical capacity,positioning them as critical enablers for next‑generation electric vehicles and high‑power devices.However,persistent commercializa... Lithium metal batteries(LMBs)offer remarkable energy density and theoretical capacity,positioning them as critical enablers for next‑generation electric vehicles and high‑power devices.However,persistent commercialization hurdles arise from uncontrolled lithium nucleation dynamics that trigger dendritic architectures and interfacial incompatibility,which degrade cycling performance and escalate safety risks.Here,an electrospinning method was proposed to fabricate flame‑retardant polymer membranes with locking‑desolvating kinetics for safe LMBs.The prepared electrode/electrolyte interface demonstrates electrolyte‑locking capability and facilitates lithium ion desolvation,contributing to inhibiting the decomposition of electrolyte and improving the efficiency of lithium ion transport.Symmetrical cells and full cells exhibit superior cycling stability and specific discharge capacity,attributed to the polymer membranes that can effectively suppress lithium dendrite formation and minimize dead lithium accumulation.Notably,the incorporation of flame‑retardant molecules within the polymer matrix significantly enhances the thermal stability of composite anodes and promotes the safety of LMBs.The methodology can be extended to explore other safe and cost‑effective polymers,advancing LMBs towards practical energy storage applications. 展开更多
关键词 Electrode/electrolyte interface Locking‑desolvating kinetics Lithium metal batteries Thermal safety
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Vortex Rossby wave phase-locking as a driver of tropical cyclone track oscillations in negative helicity environments 认领 引用
3
作者 Yihao Wang Qingqing Li 《Atmospheric and Oceanic Science Letters》 CAS CSCD 2026年第4期66-72,共7页
This study uses idealized numerical experiments to investigate the mechanisms underlying trochoidal oscillations in tropical cyclone(TC)tracks under conditions of negative TC-relative environmental helicity.Comparativ... This study uses idealized numerical experiments to investigate the mechanisms underlying trochoidal oscillations in tropical cyclone(TC)tracks under conditions of negative TC-relative environmental helicity.Comparative analyses demonstrate that the negative helicity scenario yields quasi-periodic cyclonic looping patterns not observed in the cyclonic helicity configuration.Diagnostics of potential vorticity tendency reveal that horizontal advection-driven asymmetries primarily govern directional reversals during looping phases.Oscillatory TC motion results from the quasi-periodic intensification of wavenumber-1 asymmetric winds near the eyewall,modulated by convective asymmetries:stronger upshear-left convection enhances westward displacement,whereas symmetric convection reduces these effects.The phase-locked propagation of dual wavenumber-2 vortex Rossby waves along eyewall edges appears to regulate the periodicity of convective asymmetries. 展开更多
关键词 Tropical cyclone Environmental helicity Track looping cycle Vortex Rossby wave Phase locking
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Analysis of Application Effect of Upper Locking Double Layer Nonlinear Fasteners in Nanjing Metro 认领 引用
4
作者 Zhang Minglan Wang Zhiqiang +1 位作者 Fan Yongxin Meng Hongtao 《Journal of Traffic and Transportation Engineering》 2026年第1期8-14,共7页
In this paper,the vertical and transverse frequency response characteristics of steel rails under two track structure III fastener and upper locking double-layer nonlinear fasteners(GJ-32 fasteners)are compared by onl... In this paper,the vertical and transverse frequency response characteristics of steel rails under two track structure III fastener and upper locking double-layer nonlinear fasteners(GJ-32 fasteners)are compared by online detection and hamming method on the line of normal operation of subway tunnel from Shuanglong avenue to Nanjing South Station of Nanjing Metro Line 1.The results show that:(1)The GJ-32 fasteners has a better inhibitory effect on rail vibration between 200-400 Hz compared with the Ⅲ fastener;(2)The GJ-32 fasteners has better damping performance and damping characteristics;(3)The development of corrugated rail of III fastener is serious,and the growth of corrugated rail is effectively inhibited by the upper locking double-layer nonlinear fasteners. 展开更多
关键词 Upper locking double layer nonlinear fasteners rail corrugation roughness Ⅲfastener vibration reduction.
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Slip rate and locking degree of Haiyuan fault zone,northeastern Qinghai-Xizang plateau,based on refined block model and GPS data 认领 引用
5
作者 Yang Liu Yuxuan Qiu +2 位作者 Jialiang Liu Yu Zhang Caijun Xu 《Geodesy and Geodynamics》 EI CSCD 2025年第5期536-545,共10页
As a major fault in the northeastern Qinghai-Xizang Plateau,the Haiyuan fault zone is important for understanding the regional deformation.Aiming at the differences in the slip rate and locking degree obtained from di... As a major fault in the northeastern Qinghai-Xizang Plateau,the Haiyuan fault zone is important for understanding the regional deformation.Aiming at the differences in the slip rate and locking degree obtained from different studies,this study constructs a refined block model(including Qilian,Alxa,Ordos,Xining,Haiyuan,and Lanzhou blocks)and uses the grid search and simulated annealing methods to invert GPS data for slip rate and locking degree of the Haiyuan fault zone.The results are as follows:(1)The sinistral slip rates in the western,middle,and eastern segments are 4.93-5.22 mm/a,1.52-4.94 mm/a,and 0.43-1.18 mm/a,decreasing eastward on the whole,while the compression rates are 0.45-1.26 mm/a,0.58-2.62 mm/a,and3.52-4.48 mm/a,increasing eastward on the whole.(2)The locking depth of the western segment increases from about 5 km to about 20 km eastward;the middle segment decreases and then increases eastward;the eastern segment concentrates at about 20 km(PHI is about 0.86).(3)The slip deficit is relatively higher in the Lenglongling,Jinqianghe,Maomaoshan,and Liupanshan faults(averaging about 3.42 mm/a,4.16 mm/a,4.23 mm/a,and 3.43 mm/a within 20 km).(4)The Qilian,Alxa,Xining,Lanzhou,and Haiyuan blocks rotate clockwise,while the Ordos block rotates counterclockwise.Additionally,by comparing different block models,the Haiyuan block should be considered independently.The Haiyuan fault zone adjusts surrounding block movements and uplifts Liupanshan mountain tectonically.The results can provide important references for understanding the regional earthquake risk and deformation mechanism. 展开更多
关键词 Haiyuan fault zone Block model Locking degree Slip rate
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Spin-Momentum Locking Breakdown of Evanescent Electromagnetic Waves in a Metal-Gyromagnetic Interface 认领 引用
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作者 Yidong Zheng Jianfeng Chen +1 位作者 Wenyao Liang Zhi-Yuan Li 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第8期54-68,共15页
Spin-momentum locking is widely regarded as an inherent property of evanescent waves,where the transverse spin angular momentum is intrinsically tied to the wave's polarization.This principle is well established i... Spin-momentum locking is widely regarded as an inherent property of evanescent waves,where the transverse spin angular momentum is intrinsically tied to the wave's polarization.This principle is well established in systems such as surface plasmon polaritons,surface elastic waves,and other evanescent modes.Here,we theoretically unveil an anomalous breakdown of spin-momentum locking in evanescent electromagnetic waves at a metalgyromagnetic interface.We show that the hybrid polarization of the field induces two successive reversals of transverse spin near the interface—directly violating the conventional locking between spin and momentum.As a result,identical chiral sources placed at different heights above the interface excite evanescent waves propagating in opposite directions,defying standard expectations.This discovery challenges the presumed universality of spin-momentum locking and opens new degrees of freedom for controlling wave propagation in photonic and plasmonic systems. 展开更多
关键词 hybrid polarization field evanescent electromagnetic waves evanescent modesherewe transverse spin angular momentum metalgyromagnetic interfacewe spin momentum locking surface plasmon polaritonssurface evanescent waveswhere
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A two-field mixed formulation with scattered pressure node distribution in element-free Galerkin method for alleviating volumetric locking in hyperelastic materials 认领 引用 被引量：1
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作者 S.Sai Kumar Albert Shaji Nelson Muthu 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2025年第10期115-131,共17页
Rubber-like materials that are commonly used in structural applications are modelled using hyperelastic material models.Most of the hyperelastic materials are nearly incompressible,which poses challenges,i.e.,volumetr... Rubber-like materials that are commonly used in structural applications are modelled using hyperelastic material models.Most of the hyperelastic materials are nearly incompressible,which poses challenges,i.e.,volumetric locking during numerical modelling.There exist many formulations in the context of the finite element method,among which the mixed displacementpressure formulation is robust.However,such a displacement-pressure formulation is less explored in meshfree methods,which mitigates the problem associated with mesh distortion during large deformation.This work addresses this issue of alleviating volumetric locking in the element-free Galerkin method(EFGM),which is one of the popular meshfree methods.A two-field mixed variational formulation using the perturbed Lagrangian approach within the EFGM framework is proposed for modelling nearly incompressible hyperelastic material models,such as Neo-Hookean and Mooney-Rivlin.Taking advantage of the meshless nature of the EFGM,this work introduces a unique approach by randomly distributing pressure nodes across the geometry,following specific guidelines.A wide spectrum of problems involving bending,tension,compression,and contact is solved using two approaches of the proposed displacement-pressure node formulation involving regular and irregular pressure node distribution.It is observed that both approaches give accurate results compared to the reference results,though the latter offers flexibility in the pressure nodal distribution. 展开更多
关键词 Volumetric locking Mixed displacement-pressure formulation EFG method Irregular pressure node distribution Hyperelastic materials
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Ti3C2Tx-Based Stress Sensing Fiber Modulator for Dichromatic Mode-Locking 认领 引用
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作者 Jing Liu Bin Shen +3 位作者 Yu Wan Lu Wan Chao-Qing Dai Yue-Yue Wang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第9期50-61,共12页
Fiber optic sensing technology,with its low transmission loss,wide bandwidth,and broad dynamic range,offers significant advantages for high-sensitivity measurements.In this study,a multi-band soliton modulation system... Fiber optic sensing technology,with its low transmission loss,wide bandwidth,and broad dynamic range,offers significant advantages for high-sensitivity measurements.In this study,a multi-band soliton modulation system for stress sensing is proposed,utilizing Ti3C2Txto generate ultrashort pulses.By applying stress to microfibers,dichromatic periodic multisoliton mode-locking at 1530 nm and 1555.2 nm is achieved.Vibrational mechanical stress further modulates cross-phase interactions between solitons,inducing higher-order bound solitons with small-amplitude oscillations.These dynamic processes reveal complex nonlinear optical behaviors and enhance sensing capabilities.Additionally,the feasibility of stable mode-locking of Ti3C2Txin a 1µm multimode cavity is analyzed using the multimode nonlinear Schrodinger equation,and multisoliton states are experimentally demonstrated by integrating a 1µm narrow-linewidth ultrafast multimode laser with a stressed microfiber. 展开更多
关键词 ti c tx mechanical stress applying stress ultrashort pulsesby dichromatic mode locking nonlinear optical behaviors stress sensing ultrashort pulses
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Locking up Internal Rotation of N-Phenylcarbazole in Advance to Endow Ultralong Room Temperature Phosphorescence(RTP)Afterglows in Polymers 认领 引用
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作者 Zhang Nianshuang Qin Yujing +4 位作者 Wang Shuobo Liang Yu Yang Wenjun Sun Qikun Xue Shanfeng 《有机化学》 SCIE CAS CSCD 北大核心 2025年第11期4178-4184,共7页
Internal rotation of conjugated organic backbone seriously impaired room temperature phosphorescence(RTP),leading to rare realization of ultra-long afterglows with RTP lifetimes over 2 s in non-bibulous polymers.Herei... Internal rotation of conjugated organic backbone seriously impaired room temperature phosphorescence(RTP),leading to rare realization of ultra-long afterglows with RTP lifetimes over 2 s in non-bibulous polymers.Herein,N-(bromophenyl)carbazoles are cyclized to lock up phenyl-carbazol internal rotation in advance and the fused nitrogen hetero-cyclic compounds are doped into poly(methyl methacrylate)(PMMA).The results show that locking up the molecular internal rotation can achieve ultra-long RTP polymers with lifetimes over 2 s,in contrast,the unlocked molecules hardly emit RTP in PMMA.The high-lying triplet excitons can transfer the energy to low-lying organic fluorescent dyes,and the persistent multicolor afterglows including white emission can be readily modulated.This work discloses an effective and extendable dopant molecular strategy for developing high-performance ultra-long organic RTP polymers. 展开更多
关键词 chemical locking internal rotation ultra-long afterglows room temperature phosphorescence(RTP)polymer
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A two-stage injection locking amplifier based on a cavity magnonic oscillator 认领 引用
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作者 Mun Kim Chunlei Zhang +2 位作者 Chenyang Lu Jacob Burgess Can-Ming Hu 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第6期154-159,共6页
A cavity magnonic oscillator uses the coupling of a planar transmission line oscillator(cavity) and spin excitations(magnons) in a ferrimagnetic material to achieve superior frequency stability and reduced phase noise... A cavity magnonic oscillator uses the coupling of a planar transmission line oscillator(cavity) and spin excitations(magnons) in a ferrimagnetic material to achieve superior frequency stability and reduced phase noise. Like many low phase noise oscillators, a cavity magnonic oscillator faces the challenge that its narrow resonance profile is not well suited for injection locking amplification. This work presents an improved design for such an oscillator configured as an injection locking amplifier(ILA) with an extended lock range. The proposed design features a two-stage architecture, consisting of a pre-amplification oscillator and a cavity magnonic oscillator, separated by an isolator to prevent backward locking.By optimizing the circuit parameters of each stage, the proposed design achieved an order of magnitude increase in lock range, when compared to its predecessors, all while preserving the phase noise quality of the input, making it well-suited for narrowband, sensitive signal amplification. Furthermore, this work provides a method for using oscillators with high spectral purity as injection locking amplifiers. 展开更多
关键词 cavity magnonic oscillator injection locking amplifier
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Deltopectoral vs deltoid split approach for proximal humerus fractures treated with locking plate:Our experience 认领 引用
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作者 Calogero Cicio Gianfranco Longo +11 位作者 Vito Pavone Gianluca Testa Rocco Ortuso Giovanni C Salvo Marco Ganci Ignazio Prestianni Alessio Ferrara Antonio Kory Alessandro Pietropaolo Anna M Monachino Enrica R Cuffaro Giacomo Papotto 《World Journal of Orthopedics》 2025年第9期46-55,共10页
BACKGROUND Proximal humerus fractures(PHFs)are common,especially in the elderly,and optimal surgical management remains debated.This study compares clinical,functional,and radiographic outcomes of deltoid split(DS)vs ... BACKGROUND Proximal humerus fractures(PHFs)are common,especially in the elderly,and optimal surgical management remains debated.This study compares clinical,functional,and radiographic outcomes of deltoid split(DS)vs deltopectoral(DP)approaches in PHFs treated with locking plates.AIM To evaluate and compare the clinical,functional,and radiographic outcomes-as well as postoperative complication rates-associated with the DS vs the DP surgical approach in the open reduction and internal fixation(ORIF)of PHFs using locking plate constructs.METHODS A multicenter retrospective study of 120 patients undergoing ORIF for closed Neer type II-IV PHFs between January 2023 and December 2023.Patients were grouped by surgical approach[DS(n=70),DP(n=50)].Outcome measures included Numeric Rating Scale(NRS)for pain,Quick-Disabilities in Arm,Shoulder,and Hand questionnaire(QuickDASH),Constant-Murley score,Short Form Health Survey-12v2,and radiographic alignment.Complication rates were recorded.Statistical significance was defined as P<0.05.RESULTS Early outcomes favored the DS group:(1)Lower NRS(3.1 vs 5.9);(2)Higher Constant-Murley(68.2 vs 50.5);and(3)Better QuickDASH(25.4 vs 37.1).Complication rate was lower in the DS group(1.66%vs 5.81%).Radiographic outcomes were comparable.Long-term results were similar between groups.CONCLUSION While both approaches yield satisfactory long-term outcomes,the DS approach is associated with faster early recovery and fewer complications,supporting its use in selected cases. 展开更多
关键词 Proximal humerus fracture Deltoid split Deltopectoral Locking plate Open reduction and internal fixation Functional outcome
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A Simple and Reliable Eccentric Locking Mechanism 认领 引用
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作者 Mengjiao NIU Yong ZHAO Yongliang YUAN 《Mechanical Engineering Science》 2025年第2期34-38,共5页
In view of the time-consuming and unreliable deficiencies of the cross-axis work piece in the clamping process,combined with the working characteristics of the eccentric mechanism,a simple and fast eccentric locking m... In view of the time-consuming and unreliable deficiencies of the cross-axis work piece in the clamping process,combined with the working characteristics of the eccentric mechanism,a simple and fast eccentric locking mechanism is designed.The push rod iquickly driven by the combined action of the handle and the drum,so that the cross shaft work piece can be quickly locked in the axial direction.The eccentric locking mechanism not only has simple operation and convenient maintenance,but also has the characteristics of low manufacturing cost and high life,and has certain reference value for future special fixture design. 展开更多
关键词 cross shaft eccentric mechanism locking mechanism special fixture
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Locking Effect of the Inhomogeneous Tectonic Lenticular Rock Mass in the Internal Geological Structure of the Baige Landslides 认领 引用 被引量：2
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作者 Peng Cao Huiming Tang +3 位作者 Kun Fang Jianhui Deng Zongliang Li Xinming Wu 《Journal of Earth Science》 SCIE CAS CSCD 2025年第4期1663-1681,共19页
In 2018,Baige,Xizang,witnessed two consecutive large-scale landslides,causing significant damage and drawing widespread attention.From March 2011 to February 2018,the Baige landslide exhibited a 50-m displacement with... In 2018,Baige,Xizang,witnessed two consecutive large-scale landslides,causing significant damage and drawing widespread attention.From March 2011 to February 2018,the Baige landslide exhibited a 50-m displacement without complete failure,culminating in a collapse in October 2018.The mechanisms behind its resistance to failure despite substantial deformation and the influence of the complex geo-structure within the tectonic mélange belt remain unclear.To address these questions,this study utilized a multidisciplinary approach,integrating on-site geological field mapping,surface deformation monitoring,multielectrode resistivity method,and deep displacement analysis.The aim was to evaluate the impact of the intricate geo-structure within the tectonic mélange belt on the Baige landslide events.Findings reveal that the landslide's geo-structure consists of structurally fractured,mesh-like rock masses,including heterogeneous lenticular rock masses and intermittent brittle shear zones distributed around the lens-shaped rock masses.The study underscores that the inhomogeneous and weakly deformed lenticular rock masses function as natural locked segments,governing the stability of the Baige landslide.Specifically,the relatively intact and hard granodiorite porphyry play a crucial role in locking the landslide's deformation.Deep displacement analysis indicates that the brittle shear zones act as the sliding surfaces.The progressive destruction of the locked segments and the gradual penetration of brittle shear zones,driven by gravitational potential energy,contribute to the landslide occurrence.This research provides critical insights into the formation mechanisms of large-scale landslides within tectonic mélange belts. 展开更多
关键词 Baige landslides Jinsha River tectonic mélange belt internal geological structure macro-meso-micro scales rock mass strength heterogeneity locked effect mechanisms
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LOCKING-FREE DEGENERATED ISOPARAMETRIC SHELL ELEMENT 认领 引用
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作者 章向明 王安稳 何汉林 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2001年第5期609-617,共9页
An 8-noded locking-free degenerated isoparametric shell element is presented. A revised interpolation for shear strain terms was constructed in natural co-ordinate system such that all necessary modes (translation, ro... An 8-noded locking-free degenerated isoparametric shell element is presented. A revised interpolation for shear strain terms was constructed in natural co-ordinate system such that all necessary modes (translation, rotation and constant curvature) are preserved, which can be used to eliminate shear locking. A revised interpolation for membrane strains was produced in the local Cartesian co-ordinate system to overcome membrane locking behavior. The new 8-noded element has the proper rank, with the requisite number of zero eigenvalues each associated with a rigid mode. The element does not exhibit membrane or shear locking for large span-thickness ratio. The element does not form element mechanisms or extra spurious zero energy modes. Therefore, it can be used for both thin and thick shells. 展开更多
关键词 degenerated isoparametric shell element shear locking membrane locking finite element
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Locking compression plate+T-type steel plate for postoperative weight bearing and functional recovery in complex tibial plateau fractures 认领 引用 被引量：11
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作者 Hai-Feng Li Tao Yu +2 位作者 Xing-Fei Zhu Hua Wang Ying-Qi Zhang 《World Journal of Clinical Cases》 SCIE 2022年第2期502-510,共9页
Complex tibial plateau fractures can seriously affect quality of life and physical and mental health of patients.The anatomical relationship between the proximal tibial bone and soft tissue is complex,resulting in dif... Complex tibial plateau fractures can seriously affect quality of life and physical and mental health of patients.The anatomical relationship between the proximal tibial bone and soft tissue is complex,resulting in different types of tibial plateau fractures.Violent trauma can lead to displaced fracture,serious soft tissue injury,and potentially,dislocation of the knee joint.Therefore,tibial plateau fractures are extremely unstable.AIM To assess the use of locking compression plate(LCP)+T-type steel plate for postoperative weight bearing and functional recovery of complex tibial plateau fractures.METHODS Ninety-seven patients with complex tibial plateau fractures who underwent surgery at our hospital were selected for retrospective study.Forty-nine patients had been treated with LCP+T-type steel plate limited internal fixation(study group),and 48 patients with bilateral ordinary steel plate support(control group).The operation process index,postoperative rehabilitation related index,Rasmussen score of the knee joint,tibial plateau varus angle(TPA),tibial plateau retroversion angle(PA),and surgical complications of the two groups were compared.RESULTS The operation time and intraoperative bone graft volume in the study group were lower than those in the control group(P0.05).There was no significant difference in the TPA and PA angle between the groups immediately and 18 mo after surgery(P>0.05).At 12 mo after surgery,the Rasmussen scale score was higher in the study group than in the control group(P0.05).The postoperative complication rate in the study group(3.77%)was lower than that in the control group(15.09%;P<0.05).CONCLUSION LCP+T-type steel plate internal fixation has advantages in terms of minimizing trauma and enabling early postoperative functional exercise,promoting functional recovery and lower limb weight-bearing,and reducing postoperative complications. 展开更多
关键词 Locking compression plate T-type steel plate Complexity Tibial plateau fracture Functional recovery Complications
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Laser frequency locking based on Rydberg electromagnetically induced transparency 认领 引用 被引量：3
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作者 焦月春 李敬奎 +4 位作者 王丽梅 张好 张临杰 赵建明 贾锁堂 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第5期132-134,共3页
We present a laser frequency locking to Rydberg transition with electromagnetically induced transparency（EIT）spectra in a room-temperature cesium vapor cell. Cesium levels 6S_（1/2）, 6P_（3/2）, and the n D_（5/2）... We present a laser frequency locking to Rydberg transition with electromagnetically induced transparency（EIT）spectra in a room-temperature cesium vapor cell. Cesium levels 6S_（1/2）, 6P_（3/2）, and the n D_（5/2） state, compose a cascade three-level system, where a coupling laser drives Rydberg transition, and probe laser detects the EIT signal. The error signal, obtained by demodulating the EIT signal, is used to lock the coupling laser frequency to Rydberg transition. The laser frequency fluctuation, ~0.7 MHz, is obtained after locking on, with the minimum Allan variance to be 8.9 × 10^（-11）.This kind of locking method can be used to stabilize the laser frequency to the excited transition. 展开更多
关键词 Rydberg electromagnetically induced transparency（EIT） laser locking
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Simulation and Analysis of Flexible Solar Panels' Deployment and Locking Processes 认领 引用 被引量：7
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作者 高二威 张雪萍 姚振强 《Journal of Shanghai Jiaotong university(Science)》 EI 2008年第3期275-279,共5页
To predict the attitude of satellite during the whole deployment process and evaluate the locking impact, a numerical flexible model of a certain satellite associated with four flexible honeycomb solar panels was esta... To predict the attitude of satellite during the whole deployment process and evaluate the locking impact, a numerical flexible model of a certain satellite associated with four flexible honeycomb solar panels was established. The flexible solar panel was modeled by the finite element analysis (FEA), and the motion equations were derived by Lagrangian formulation. The locking process was based on the method of Hertzian contact, which enables one to predict the locking impact on the satellite and the subsequent oscillation of solar panels. The results reveal that locking operation has great impact on the attitude of the satellite, and the angular acceleration of satellite reaches 22.03°/s2 at the locking moment; the flexible solar panels model is feasible to predict the accurate response of the satellite during deployment and the oscillation of solar panels; the instantly impulsive force occurred during locking process is about 1.5 kN and the changing time is nearly 0.32 s. It provides an effective approach to present the flexible solar panels' deployment process and evaluate the locking impact. 展开更多
关键词 flexible solar panels deoloyment locking impact simulation
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Locking of Tearing Modes by the Error Field 认领 引用 被引量：3
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作者 XU Tao HU Qi-Ming +1 位作者 HU Xi-Wei YU Qing-Quan 《Chinese Physics Letters》 SCIE EI CAS CSCD 2011年第9期190-193,共4页
The locking of tearing modes by the error field is studied by nonlinear numerical modeling.The threshold of mode locking for J-TEXT tokamak plasmas is found.
关键词 tokamak locking mode
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Frequency-locking and threshold current-lowering effects of a quantum cascade laser and an application in gas detection field 认领 引用 被引量：2
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作者 陈伟根 万福 +2 位作者 邹经鑫 顾朝亮 周渠 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第2期165-169,共5页
In this paper,the frequency-locking and threshold current-lowering effects of a quantum cascade laser are studied and achieved.Combined with cavity-enhanced absorption spectroscopy,the noninvasive detection of H_2 wit... In this paper,the frequency-locking and threshold current-lowering effects of a quantum cascade laser are studied and achieved.Combined with cavity-enhanced absorption spectroscopy,the noninvasive detection of H_2 with a prepared concentration of 500 ppm in multiple dissolved gases is performed and evaluated.The high frequency selectivity of 0.0051 cm^-1 at an acquisition time of 1 s allows the sensitive detection of the（1-0） S（l） band of H_2 with a high accuracy of（96.53±0.29）%and shows that the detection limit to an absorption line of 4712.9046 cm^-1 is approximately（17.26±0.63） ppm at an atmospheric pressure and a temperature of 20 ℃. 展开更多
关键词 quantum cascade laser frequency locking threshold current lowering cavity-enhanced absorptionspectroscopy
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Coherent Beam Combining of Two Slab Laser Amplifiers and Second-Harmonic Phase Locking Based on a Multi-Dithering Technique 认领 引用 被引量：2
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作者 LI Xiao XIAO Hu +2 位作者 DONG Xiao-Lin MA Yan-Xing XU Xiao-Jun 《Chinese Physics Letters》 SCIE EI CAS CSCD 2011年第9期155-158,共4页
Coherent beam combining(CBC)is an efficient way to scale the brightness of laser arrays.We demonstrate the active phase locking CBC of two slab laser amplifiers based on the multi-dithering technique.The experimental ... Coherent beam combining(CBC)is an efficient way to scale the brightness of laser arrays.We demonstrate the active phase locking CBC of two slab laser amplifiers based on the multi-dithering technique.The experimental investigation on the 102 W coherent beam combining of two slab amplifiers shows that the whole system in a closed loop performs well over a long time observation.The contrast of the coherent combined beam profile is about 87%and the combining efficiency is nearly 85%.In addition,the CBC of two green lasers is realized based on the second-harmonic generation of the phase locking pump lasers.To the best of our knowledge,this is the first report about second-harmonic active phase locking,which indicates further potential applications of CBC. 展开更多
关键词 technique pump locking
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