Laser Physics最新文献_第6页

Optomechanically induced transparency in a hybrid system containing two-level atomic ensemble and optical parametric amplifier 包含两级原子团和光参量放大器的混合系统中的光机械诱导透明度

IF 1.2 4区物理与天体物理

Laser Physics Pub Date : 2024-03-08 DOI: 10.1088/1555-6611/ad2beb

Gongtao Yu, Guixia Pan

{"title":"Optomechanically induced transparency in a hybrid system containing two-level atomic ensemble and optical parametric amplifier","authors":"Gongtao Yu, Guixia Pan","doi":"10.1088/1555-6611/ad2beb","DOIUrl":"https://doi.org/10.1088/1555-6611/ad2beb","url":null,"abstract":"We investigate the physical properties of multiple optomechanically induced transparency in a system. The system consists of two charged mechanical resonators and an optical cavity. An optical parametric amplifier (OPA) and a two-level atom ensemble are filled into the optical cavity. Some physical phenomena appear in the system driven by the probe field and the pump field. The width of transparent windows can be manipulated by the coupling strengths of the system. Specifically, the width of the transparency window increases with an increase in the parametric gain of the optical parametric amplifier (OPA). Furthermore, the number of transparent windows and the location of transparent points are also affected by the system parameters. The presence of two-level atomic ensemble causes the double transparent windows to be split three transparent windows. The Coulomb coupling between the two charged mechanical resonators causes the transparent points to move. Our approach provides a great flexibility for manipulating multiple induced transparency. It is helpful to study the quantum properties of nonlinear optical systems.","PeriodicalId":17976,"journal":{"name":"Laser Physics","volume":"32 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140315012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation of a wideband supercontinuum source based on a large-mode-area photonic crystal fiber pumped at 1.3 μm 基于 1.3 μm 泵浦大模面积光子晶体光纤的宽带超连续光源的数值研究

IF 1.2 4区物理与天体物理

Laser Physics Pub Date : 2024-03-05 DOI: 10.1088/1555-6611/ad2bf9

Yu Xin Jin, Qian Qian Hao, Jing Jing Liu, Jie Liu, Qian Qian Peng

引用次数: 0

How many sessions of quantum key distribution are allowed from the first launch to the next restart of the system? 从系统第一次启动到下一次重启，允许多少次量子密钥分发？

IF 1.2 4区物理与天体物理

Laser Physics Pub Date : 2024-02-26 DOI: 10.1088/1555-6611/ad2928

S N Molotkov

引用次数: 0

Hybrid modeling and optimization of fiber laser hole cutting of austenitic stainless-steel sheets using response surface 利用响应曲面对奥氏体不锈钢板的光纤激光孔切割进行混合建模和优化

IF 1.2 4区物理与天体物理

Laser Physics Pub Date : 2024-02-22 DOI: 10.1088/1555-6611/ad26ea

Zhenhua Niu, Mohammad Hossein Razavi Dehkordi, Mohammadreza Ghazi, Mohammad Akbari

{"title":"Hybrid modeling and optimization of fiber laser hole cutting of austenitic stainless-steel sheets using response surface","authors":"Zhenhua Niu, Mohammad Hossein Razavi Dehkordi, Mohammadreza Ghazi, Mohammad Akbari","doi":"10.1088/1555-6611/ad26ea","DOIUrl":"https://doi.org/10.1088/1555-6611/ad26ea","url":null,"abstract":"In this study, an efficient approach was proposed to systematically model and optimize the laser small hole cutting process parameters using a hybrid approach for the design of experiment and multi-objective genetic algorithm optimization. The central composite design and response surface methodology were used to effectively model the impact of four main factors: cutting speed, laser power, gas pressure and focal distance on the responses. The responses considered were hole diameter circularity tolerance, spattering and cut kerf width, which were used to evaluate the quality of the laser hole cutting. The regression equations were used to model the effect of process parameters and their interactions on the responses. These regression models were then used as objective functions for optimization. The results show that the focal distance and laser power have had a significant influence on the hole diameter circularity tolerance and the variation in size of the cut kerf. In particular, the melted material spattering rate increased threefold when the focal distance increased from 0.4 to 0.8 mm. The optimization results highlighted that the best outcomes in terms of minimum deviation, spatter, and the cut-kerf width were achieved at low power (between 605 and 685 W) and low speeds (in the range of 11.1–12.7 m min−1). The optimal focal distance for all solutions was found to be 0 mm for the gas pressure (between 6.5 and 8 bars) to minimize the objective functions.","PeriodicalId":17976,"journal":{"name":"Laser Physics","volume":"4 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140005290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-focusing/defocusing of skew-cosh-Gaussian laser beam for collisional plasma 用于碰撞等离子体的斜高斯激光束的自聚焦/去聚焦

IF 1.2 4区物理与天体物理

Laser Physics Pub Date : 2024-02-12 DOI: 10.1088/1555-6611/ad2445

K Y Khandale, S S Patil, P T Takale, A S Patil, R T Patil, S D Patil, M V Takale

{"title":"Self-focusing/defocusing of skew-cosh-Gaussian laser beam for collisional plasma","authors":"K Y Khandale, S S Patil, P T Takale, A S Patil, R T Patil, S D Patil, M V Takale","doi":"10.1088/1555-6611/ad2445","DOIUrl":"https://doi.org/10.1088/1555-6611/ad2445","url":null,"abstract":"The inverse relationship between the linear increase in skewness parameter <italic toggle=\"yes\">s</italic> and the domain’s width of the order of skewness <italic toggle=\"yes\">n</italic> plays a vital role in both critical beam radius and propagation dynamics of skew-cosh-Gaussian (skew-chG) laser beams. The interplay between the skewness parameter <italic toggle=\"yes\">s</italic> and the order of skewness <italic toggle=\"yes\">n</italic> is explored analytically and graphically in the current study to unveil the complexity of the propagation dynamics of the skew-chG laser beam. Naturally, the intensity’s complexity considerably affects the dielectric constant of the medium. Basically, the nonlinearity in the dielectric function of collisional plasma is attributed to the non-uniform heating of energy carriers along the wavefront of the laser beam, which becomes important and is used in the current study. By following Akhmanov’s parabolic wave equation approach under Wentzel–Kramers–Brillouin and paraxial approximations, the nonlinear differential equations are set up for the beam width parameters <italic toggle=\"yes\">f</italic>\u00001 and <italic toggle=\"yes\">f</italic>\u00002 and solved numerically. The present work analytically investigates the domains of the order <italic toggle=\"yes\">n</italic> of skew-chG laser beams for a given set of skewness parameter <italic toggle=\"yes\">s</italic> to investigate their effects on the self-focusing and defocusing of skew-chG laser beams. The critical curve also gets affected significantly due to the choice of domains for <italic toggle=\"yes\">n</italic>. Finally, the numerical results are presented in the form of graphs and discussed in this study.","PeriodicalId":17976,"journal":{"name":"Laser Physics","volume":"45 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139770427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of Ohmic noise on the dynamics of three-spin open quantum system 欧姆噪声对三自旋开放量子系统动力学的影响

IF 1.2 4区物理与天体物理

Laser Physics Pub Date : 2024-02-12 DOI: 10.1088/1555-6611/ad2444

Muhammad Javed, Sidra Salim, Sumayya Said, Khushnood Shah, Atta ur Rahman

{"title":"The influence of Ohmic noise on the dynamics of three-spin open quantum system","authors":"Muhammad Javed, Sidra Salim, Sumayya Said, Khushnood Shah, Atta ur Rahman","doi":"10.1088/1555-6611/ad2444","DOIUrl":"https://doi.org/10.1088/1555-6611/ad2444","url":null,"abstract":"The dynamics of open quantum systems under decoherence effects remain a hotly debated topic in the case of the practical deployment of quantum information processing. In this regard, we examine how the three-qubit mixed state is affected by changes in the cut-off frequency of the Ohmic spectral density in a harmonic reservoir. Specifically, the degree of quantum memory-assisted entropic uncertainty (QMA-EU), along with the entanglement, coherence, and purity of the system, is to be demonstrated. A thorough exercise is done to investigate any underlying relationship between the three-qubit quantum characteristics. We show that a harmonic reservoir controlled by Ohmic noise prevails a monotonic-like decay in the current case where, sooner or later, the state becomes completely disentangled, decoherent, and mixed. The QMA-EU has always been found to have an increasing function causing the quantum resourcefulness to be reduced. Although, there is no pathway to avoid the Ohmic noise consequences and complete decay, however, we provided parameterization which would lead to prolonged preservation of quantum correlations with time. Finally, we provide various settings for the tuning of cut-off frequency regarding the Ohmic type bath and state parameters on the initial as well as final levels of quantum features.","PeriodicalId":17976,"journal":{"name":"Laser Physics","volume":"20 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139770118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of renal calculi fragmented tracer particles in lithotripsy model by laser speckle technique 利用激光斑点技术研究碎石模型中的肾结石碎屑示踪颗粒

IF 1.2 4区物理与天体物理

Laser Physics Pub Date : 2024-02-09 DOI: 10.1088/1555-6611/ad21f8

R Balamurugan, K Rathina

引用次数: 0

Belt conveyor speed detection based on fiber-optic Sagnac interferometer vibration sensor 基于光纤萨格纳克干涉仪振动传感器的皮带输送机速度检测系统

IF 1.2 4区物理与天体物理

Laser Physics Pub Date : 2024-02-01 DOI: 10.1088/1555-6611/ad21ee

Yaru Hou, Pingjuan Niu, Jia Shi, Yuan Xie, Mengyu Yang

引用次数: 0

Resonant second-harmonic generation of self-focused oblique incident laser beam in plasma 等离子体中自聚焦斜入射激光束的共振二次谐波生成