A enhancing scheme of quantum teleportation of the X-type initial state is proposed in Pauli noisy channel with memory. Compared to the noisy channels without memory, the memory coefficient improves the fidelity of quantum teleportation to a certain extent under a given damping coefficient. Among the three initial states, the memory coefficient provides the most significant enhancement in fidelity for the Bell state. For channels with full memory, the fidelity of quantum teleportation can reach the maximum value of the corresponding state, remaining unaffected by changes in the damping coefficient. This indicates that the memory factor enhances the fidelity and entanglement of the X-type system in Pauli channel, providing robust support for the realization of quantum communication.
{"title":"Enhancing Quantum Teleportation of the X-type Systems Under Pauli Channel with Memory","authors":"MeiJiao Wang, LianZhen Cao, Yang Yang, Bing Sun, Xia Liu, JiaQiang Zhao","doi":"10.1007/s10773-025-05984-w","DOIUrl":"10.1007/s10773-025-05984-w","url":null,"abstract":"<div><p>A enhancing scheme of quantum teleportation of the X-type initial state is proposed in Pauli noisy channel with memory. Compared to the noisy channels without memory, the memory coefficient improves the fidelity of quantum teleportation to a certain extent under a given damping coefficient. Among the three initial states, the memory coefficient provides the most significant enhancement in fidelity for the Bell state. For channels with full memory, the fidelity of quantum teleportation can reach the maximum value of the corresponding state, remaining unaffected by changes in the damping coefficient. This indicates that the memory factor enhances the fidelity and entanglement of the X-type system in Pauli channel, providing robust support for the realization of quantum communication.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 5","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875316","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}
Pub Date : 2025-04-26DOI: 10.1007/s10948-025-06950-7
N. Radhikesh Raveendran, Vinita Kumawat, E. P. Amaladass, A. T. Sathyanarayana, T. Geetha Kumary, Awadhesh Mani
Thin films of superconducting Nd1.85Ce0.15CuO4±δ were synthesized by a pulsed laser deposition method followed by ex situ annealing in an argon atmosphere. Structural, morphological and electrical characterizations were performed using X-ray diffraction, scanning electron microscopy and temperature-dependent resistivity measurements respectively. X-ray analysis reveals preferential orientation in (001) and (110) directions for the thin films. Resistivity measurements demonstrated a pronounced superconducting behavior in the argon annealed thin films. The critical superconducting properties, the upper critical field and critical current density, were investigated using magneto-transport and magnetization measurements. The anisotropic coefficient which is the ratio of the upper critical field parallel and perpendicular to that of ab plane has been assessed highlighting the significant anisotropy of the Nd1.85Ce0.15CuO4±δ superconductor. The analysis of the activation energy reveals the three-dimensional nature of the vortex lattice in this system.
{"title":"Anisotropic Upper Critical Field in Nd1.85Ce0.15CuO4±δ Superconducting Thin Films","authors":"N. Radhikesh Raveendran, Vinita Kumawat, E. P. Amaladass, A. T. Sathyanarayana, T. Geetha Kumary, Awadhesh Mani","doi":"10.1007/s10948-025-06950-7","DOIUrl":"10.1007/s10948-025-06950-7","url":null,"abstract":"<div><p>Thin films of superconducting Nd<sub>1.85</sub>Ce<sub>0.15</sub>CuO<sub>4±δ</sub> were synthesized by a pulsed laser deposition method followed by ex situ annealing in an argon atmosphere. Structural, morphological and electrical characterizations were performed using X-ray diffraction, scanning electron microscopy and temperature-dependent resistivity measurements respectively. X-ray analysis reveals preferential orientation in (001) and (110) directions for the thin films. Resistivity measurements demonstrated a pronounced superconducting behavior in the argon annealed thin films. The critical superconducting properties, the upper critical field and critical current density, were investigated using magneto-transport and magnetization measurements. The anisotropic coefficient which is the ratio of the upper critical field parallel and perpendicular to that of <i>ab</i> plane has been assessed highlighting the significant anisotropy of the Nd<sub>1.85</sub>Ce<sub>0.15</sub>CuO<sub>4±δ</sub> superconductor. The analysis of the activation energy reveals the three-dimensional nature of the vortex lattice in this system.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-06950-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Due to the limited dynamic range of cameras, reconstruction tasks on high dynamic range surfaces often exhibit overexposed and underexposed regions in the captured images, compromising measurement accuracy and completeness. Existing high dynamic range measurement techniques perform 3D reconstruction directly using image intensity or multi-exposure fusion methods. These techniques cannot simultaneously meet the requirements of single-shot measurement, high precision, high completeness, and ease of use. In this article, we propose a novel measurement method with single shot to address these challenges. Different from existing methods, a multi-view stereo pipeline is proposed to fully utilize the properly exposed areas of different views. By multi-view matching based on photometric and geometric consistency, the depth and normal vector for each pixel in every view will be obtained. The depth and normal vector can be combined into a spatial slanted plane, initializing the first-order shape function parameters. A multi-view digital speckle correlation method is proposed to optimize the plane parameters. Finally, the plane parameters are integrated to produce the depth map fusion. A four-camera measurement system with a photolithographic speckle projection module is developed for experimental validation. Extensive quantitative and qualitative experiments demonstrate that the proposed method achieves the measurement accuracy of 0.04–0.07 mm, meeting the requirements of industrial applications.
{"title":"A novel method for high dynamic range optical measurement with single shot by multi-view stereo","authors":"Haitao Wu , Yanzhen Dong , Xiaobo Chen , Juntong Xi","doi":"10.1016/j.optlastec.2025.112930","DOIUrl":"10.1016/j.optlastec.2025.112930","url":null,"abstract":"<div><div>Due to the limited dynamic range of cameras, reconstruction tasks on high dynamic range surfaces often exhibit overexposed and underexposed regions in the captured images, compromising measurement accuracy and completeness. Existing high dynamic range measurement techniques perform 3D reconstruction directly using image intensity or multi-exposure fusion methods. These techniques cannot simultaneously meet the requirements of single-shot measurement, high precision, high completeness, and ease of use. In this article, we propose a novel measurement method with single shot to address these challenges. Different from existing methods, a multi-view stereo pipeline is proposed to fully utilize the properly exposed areas of different views. By multi-view matching based on photometric and geometric consistency, the depth and normal vector for each pixel in every view will be obtained. The depth and normal vector can be combined into a spatial slanted plane, initializing the first-order shape function parameters. A multi-view digital speckle correlation method is proposed to optimize the plane parameters. Finally, the plane parameters are integrated to produce the depth map fusion. A four-camera measurement system with a photolithographic speckle projection module is developed for experimental validation. Extensive quantitative and qualitative experiments demonstrate that the proposed method achieves the measurement accuracy of 0.04–0.07 mm, meeting the requirements of industrial applications.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"189 ","pages":"Article 112930"},"PeriodicalIF":4.6,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2025-04-26DOI: 10.1016/j.cjph.2025.03.051
Asma Alanazy , Galal M. Moatimid , Doaa R. Mostapha
The investigation of electrohydrodynamic (EHD) nonlinear instability at a cylindrical interface concerning two Williamson fluids (W) is distinctive owing to its significance in industrial and biomedical contexts, including inkjet printing, electro-spinning, and enhanced oil recovery, where comprehending the stability of viscoelastic liquid interfaces under electric fields is significant for performance optimization and fluid behavior regulation. The study uses a nonlinear methodology to analyze the stability of a vertical cylindrical interface between two WF through porous media, concentrating on the impact of an axial uniform EF. The nonlinear methodology expresses the essential linear partial differential equations (PDEs) and implements the applicable nonlinear boundary conditions (BCs). This method produces a nonlinear distinguishing PDE. The non-perturbative approach (NPA) is employed to examine nonlinear stability. The main impartial of NPA is to transform a nonlinear ordinary differential equation (ODE) into a linear one. The NPA is differentiated from traditional perturbation techniques by its ability to precisely scrutinize the behavior of extremely nonlinear oscillators. This distinctive methodology is advanced by extending He's frequency formula (HFF) to orchestrate the movement of the interface. The study demonstrates that the structure stabilizes by elevating both the axial wavenumber and axial EF. It is found that the stability mechanism remains unchanged irrespective of whether the coefficients of the distinguishing ODE are real or complex. PolarPlots are generated independently for real and complex cases to grantee the impact of numerous variables and the effectiveness of the stability profile.
{"title":"EHD nonlinear instability of a cylindrical interface between two williamson liquids","authors":"Asma Alanazy , Galal M. Moatimid , Doaa R. Mostapha","doi":"10.1016/j.cjph.2025.03.051","DOIUrl":"10.1016/j.cjph.2025.03.051","url":null,"abstract":"<div><div>The investigation of electrohydrodynamic (EHD) nonlinear instability at a cylindrical interface concerning two Williamson fluids (W) is distinctive owing to its significance in industrial and biomedical contexts, including inkjet printing, electro-spinning, and enhanced oil recovery, where comprehending the stability of viscoelastic liquid interfaces under electric fields is significant for performance optimization and fluid behavior regulation. The study uses a nonlinear methodology to analyze the stability of a vertical cylindrical interface between two WF through porous media, concentrating on the impact of an axial uniform EF. The nonlinear methodology expresses the essential linear partial differential equations (PDEs) and implements the applicable nonlinear boundary conditions (BCs). This method produces a nonlinear distinguishing PDE. The non-perturbative approach (NPA) is employed to examine nonlinear stability. The main impartial of NPA is to transform a nonlinear ordinary differential equation (ODE) into a linear one. The NPA is differentiated from traditional perturbation techniques by its ability to precisely scrutinize the behavior of extremely nonlinear oscillators. This distinctive methodology is advanced by extending He's frequency formula (HFF) to orchestrate the movement of the interface. The study demonstrates that the structure stabilizes by elevating both the axial wavenumber and axial EF. It is found that the stability mechanism remains unchanged irrespective of whether the coefficients of the distinguishing ODE are real or complex. PolarPlots are generated independently for real and complex cases to grantee the impact of numerous variables and the effectiveness of the stability profile.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 1018-1042"},"PeriodicalIF":4.6,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2025-04-26DOI: 10.1016/j.nima.2025.170527
I.M. Harca , M.J. Basson , K.J. Cook , K.W. Brown , S.A. Gillespie , A.K. Anthony , N.E. Esker , S.N. Paneru
The Fusion and Breakup of Light Elements (FABLE) array, comprised of E-E telescopes of neutron-transmutation doped (NTD) Double-Sided Silicon Strip Detectors (DSSDs), has been developed and commissioned for future experiments at the Facility for Rare Isotope Beams (FRIB). FABLE was designed to perform measurements of complete and incomplete fusion cross sections, to help address the interplay between breakup and clustering in outcomes of reactions with exotic nuclides. The FABLE array has been commissioned in a comprehensive study at the ReAccelerator facility ReA6 of the Facility for Rare Isotope Beams (FRIB), investigating the dynamics in the weakly-bound proton rich 7Be reaction on 208Pb targets.
{"title":"The FABLE silicon detector array for comprehensive studies of fusion and breakup dynamics","authors":"I.M. Harca , M.J. Basson , K.J. Cook , K.W. Brown , S.A. Gillespie , A.K. Anthony , N.E. Esker , S.N. Paneru","doi":"10.1016/j.nima.2025.170527","DOIUrl":"10.1016/j.nima.2025.170527","url":null,"abstract":"<div><div>The <strong>F</strong>usion <strong>a</strong>nd <strong>B</strong>reakup of <strong>L</strong>ight <strong>E</strong>lements (<strong>FABLE</strong>) array, comprised of <span><math><mi>Δ</mi></math></span>E-E telescopes of neutron-transmutation doped (NTD) Double-Sided Silicon Strip Detectors (DSSDs), has been developed and commissioned for future experiments at the Facility for Rare Isotope Beams (FRIB). FABLE was designed to perform measurements of complete and incomplete fusion cross sections, to help address the interplay between breakup and clustering in outcomes of reactions with exotic nuclides. The FABLE array has been commissioned in a comprehensive study at the ReAccelerator facility ReA6 of the Facility for Rare Isotope Beams (FRIB), investigating the dynamics in the weakly-bound proton rich <sup>7</sup>Be reaction on <sup>208</sup>Pb targets.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170527"},"PeriodicalIF":1.5,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2025-04-26DOI: 10.1016/j.optlastec.2025.112936
Hao Cui , Xingqiang Li , Rigang Cong , Chuanxing Liu , Jinsong Du
The key geometric parameters of miniaturized rotational parts significantly influence the overall performance and service life of equipment, such as bore diameter, roundness, cylindricity, generatrix contour, etc. However, most existing measurement technologies are aimed at certain types of parameters and fail to provide full-scale and high-precision measurements, especially when measuring space is limited. In this paper, a 4-axis linkage spatial measurement system is established, equipped with a precision air-floating turntable and a compact fiber optic probe. Innovations include: (1) An efficient 4-axis linkage calibration method is proposed. This method can achieve precise calibration of the laser direction vector or the rotation axis position with only a single scan; (2) On this basis, a polar-coordinate measurement model for any positive section of rotational parts is proposed, eliminating the negative impact of part offset on measurement accuracy. Experimental results show that the measurement error of the diameter, the roundness and the cylindricity is approximately , and , respectively. The average measurement error of the generatrix contour is . Compared with the traditional contact coordinate measuring machine, the overall measurement efficiency is improved by about 67%, demonstrating that this method meets the requirements for on-site efficient and precise measurement of miniaturized rotational parts.
{"title":"An efficient on-site calibration method and precise measurement model for miniaturized rotational parts based on four-axis linkage spatial measurement system","authors":"Hao Cui , Xingqiang Li , Rigang Cong , Chuanxing Liu , Jinsong Du","doi":"10.1016/j.optlastec.2025.112936","DOIUrl":"10.1016/j.optlastec.2025.112936","url":null,"abstract":"<div><div>The key geometric parameters of miniaturized rotational parts significantly influence the overall performance and service life of equipment, such as bore diameter, roundness, cylindricity, generatrix contour, etc. However, most existing measurement technologies are aimed at certain types of parameters and fail to provide full-scale and high-precision measurements, especially when measuring space is limited. In this paper, a 4-axis linkage spatial measurement system is established, equipped with a precision air-floating turntable and a compact fiber optic probe. Innovations include: (1) An efficient 4-axis linkage calibration method is proposed. This method can achieve precise calibration of the laser direction vector or the rotation axis position with only a single scan; (2) On this basis, a polar-coordinate measurement model for any positive section of rotational parts is proposed, eliminating the negative impact of part offset on measurement accuracy. Experimental results show that the measurement error of the diameter, the roundness and the cylindricity is approximately <span><math><mrow><mn>3</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>, <span><math><mrow><mn>2</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> and <span><math><mrow><mn>2</mn><mo>.</mo><mn>8</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>, respectively. The average measurement error of the generatrix contour is <span><math><mrow><mn>4</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>. Compared with the traditional contact coordinate measuring machine, the overall measurement efficiency is improved by about 67%, demonstrating that this method meets the requirements for on-site efficient and precise measurement of miniaturized rotational parts.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"189 ","pages":"Article 112936"},"PeriodicalIF":4.6,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2025-04-26DOI: 10.1007/s10043-025-00969-w
Hiroki Ono, Shigeru Matsumura, Zenta Ushiyama
This paper presents a new method for analyzing ghost paths for camera lens design using a method that predefines ray orders and uses cloud-based parallel processing. Our method enables comprehensive ghost analysis of complex optical systems with multiple reflections, which were previously considered computationally impractical. The performance evaluation demonstrated the successful processing of over 4.4 billion rays through complex optical paths, completing calculations within practical time constraints.
{"title":"Exploring ghost ray tracing in a massively parallel fast ray tracing within a cloud computing environment","authors":"Hiroki Ono, Shigeru Matsumura, Zenta Ushiyama","doi":"10.1007/s10043-025-00969-w","DOIUrl":"https://doi.org/10.1007/s10043-025-00969-w","url":null,"abstract":"<p>This paper presents a new method for analyzing ghost paths for camera lens design using a method that predefines ray orders and uses cloud-based parallel processing. Our method enables comprehensive ghost analysis of complex optical systems with multiple reflections, which were previously considered computationally impractical. The performance evaluation demonstrated the successful processing of over 4.4 billion rays through complex optical paths, completing calculations within practical time constraints.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"69 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875784","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}
Pub Date : 2025-04-26DOI: 10.1007/s11005-025-01936-x
Pedro Frejlich, David Martínez Torres
We discuss in this note two dual canonical operations on Dirac structures L and R—the tangent product(L star R) and the cotangent product(L circledast R). Our first result gives an explicit description of the leaves of (L star R) in terms of those of L and R, surprisingly ruling out the pathologies which plague general “induced Dirac structures.” In contrast to the tangent product, the more novel cotangent product (L circledast R) need not be Dirac even if smooth. When it is, we say that L and Rconcur. Concurrence captures commuting Poison structures and refines the Dirac pairs of Dorfman and Kosmann–Schwarzbach, and it is our proposal as the natural notion of “compatibility” between Dirac structures. The rest of the paper is devoted to illustrating the usefulness of tangent- and cotangent products in general, and the notion of concurrence in particular. Dirac products clarify old constructions in Poisson geometry, characterize Dirac structures which can be pushed forward by a smooth map, and mandate a version of a local normal form. Magri and Morosi’s (POmega )-condition and Vaisman’s notion of two-forms complementary to a Poisson structures are found to be instances of concurrence, as is the setting for the Frobenius–Nirenberg theorem. We conclude the paper with an interpretation in the style of Magri and Morosi of generalized complex structures which concur with their conjugates.
{"title":"Dirac products and concurring Dirac structures","authors":"Pedro Frejlich, David Martínez Torres","doi":"10.1007/s11005-025-01936-x","DOIUrl":"10.1007/s11005-025-01936-x","url":null,"abstract":"<div><p>We discuss in this note two dual canonical operations on Dirac structures <i>L</i> and <i>R</i>—the <i>tangent product</i> <span>(L star R)</span> and the <i>cotangent product</i> <span>(L circledast R)</span>. Our first result gives an explicit description of the leaves of <span>(L star R)</span> in terms of those of <i>L</i> and <i>R</i>, surprisingly ruling out the pathologies which plague general “induced Dirac structures.” In contrast to the tangent product, the more novel cotangent product <span>(L circledast R)</span> need not be Dirac even if smooth. When it is, we say that <i>L</i> and <i>R</i> <i>concur</i>. Concurrence captures commuting Poison structures and refines the <i>Dirac pairs</i> of Dorfman and Kosmann–Schwarzbach, and it is our proposal as the natural notion of “compatibility” between Dirac structures. The rest of the paper is devoted to illustrating the usefulness of tangent- and cotangent products in general, and the notion of concurrence in particular. Dirac products clarify old constructions in Poisson geometry, characterize Dirac structures which can be pushed forward by a smooth map, and mandate a version of a local normal form. Magri and Morosi’s <span>(POmega )</span>-condition and Vaisman’s notion of two-forms complementary to a Poisson structures are found to be instances of concurrence, as is the setting for the Frobenius–Nirenberg theorem. We conclude the paper with an interpretation in the style of Magri and Morosi of generalized complex structures which concur with their conjugates.\u0000</p></div>","PeriodicalId":685,"journal":{"name":"Letters in Mathematical Physics","volume":"115 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2025-04-26DOI: 10.1016/j.optlastec.2025.112996
Yongfeng Xie, Hong Zhang, Yan Cheng, Yuehong Zhu, Junhong Liu
We present an electro-optic (EO) Q-switched Er:ZBLAN fiber laser based on a customized La3Ga5SiO14 (LGS) crystal. We investigate the effects of pump power and repetition rate on the laser output. At a repetition rate of 100 Hz, the laser generates stable pulses with a pulse width of 74 ns, pulse energy of 350 μJ, and peak power of 4.6 kW. At a repetition rate of 10 kHz, the laser achieves stable pulses with a pulse width of 159 ns, pulse energy of 15.7 μJ, and peak power of 99 W. Additionally, the laser exhibits a wavelength tuning range of approximately 90 nm at 2.7 μm under Q-switching modulation at 5 kHz. The results indicate that the laser provides stable pulse output in the 2.7 μm wavelength region.
{"title":"Wavelength tunable actively Q-switched Er:ZBLAN fiber laser using LGS crystal as electro-optic modulator","authors":"Yongfeng Xie, Hong Zhang, Yan Cheng, Yuehong Zhu, Junhong Liu","doi":"10.1016/j.optlastec.2025.112996","DOIUrl":"10.1016/j.optlastec.2025.112996","url":null,"abstract":"<div><div>We present an electro-optic (EO) Q-switched Er:ZBLAN fiber laser based on a customized La<sub>3</sub>Ga<sub>5</sub>SiO<sub>14</sub> (LGS) crystal. We investigate the effects of pump power and repetition rate on the laser output. At a repetition rate of 100 Hz, the laser generates stable pulses with a pulse width of 74 ns, pulse energy of 350 μJ, and peak power of 4.6 kW. At a repetition rate of 10 kHz, the laser achieves stable pulses with a pulse width of 159 ns, pulse energy of 15.7 μJ, and peak power of 99 W. Additionally, the laser exhibits a wavelength tuning range of approximately 90 nm at 2.7 μm under Q-switching modulation at 5 kHz. The results indicate that the laser provides stable pulse output in the 2.7 μm wavelength region.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"189 ","pages":"Article 112996"},"PeriodicalIF":4.6,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2025-04-26DOI: 10.1016/j.optlastec.2025.113001
Meichen Xia , Yuxuan Zhang , Hong Peng , Zhicai Liu , Jun Guo
Infrared small target detection (IRSTD) has become a significant challenge due to the weak target, complex and variable backgrounds, and harsh imaging environments. Currently, most models are based on the U-net framework or its improved versions, but they often overlook the in-depth optimization of the output features. In response to this situation, this paper innovatively proposes a network specifically designed for this task, called UFNet-NSNP. The core of this network is its unique Ultra Fusion Net (UFNet), which efficiently integrates multiscale and multilevel features to significantly enhance the detail expressiveness of images. In addition, UFNet-NSNP introduces a novel Convolutional Attention Fusion Module (CAFM-SNP), which processes and further fuses the output features of the UFNet through cascaded Dilated convolutions and attention mechanisms to comprehensively enhance the global information capture capability of images. At the same time, the network has designed a nonlinear attention mechanism (NA) based on the nonlinear spiking mechanism, and by combining this mechanism with the spatial attention mechanism (SA), it has created a new attention module(NSNP-A). This module can enhance the nonlinear features of images. Experiments were conducted on the NUAA-SIRST and IRSTD-1k datasets. The experimental results show that UFNet-NSNP achieved an of 77.46% on the NUAA-SIRST dataset and 69.21% on the IRSTD-1k dataset, it demonstrates superior comprehensive performance compared to existing state-of-the-art (SOTA) methods. The code will be available at https://github.com/ZYX-111222/UFNet-NSNP.
{"title":"A ultra fusion network model based on nonlinear spiking neural P systems for infrared small target detection","authors":"Meichen Xia , Yuxuan Zhang , Hong Peng , Zhicai Liu , Jun Guo","doi":"10.1016/j.optlastec.2025.113001","DOIUrl":"10.1016/j.optlastec.2025.113001","url":null,"abstract":"<div><div>Infrared small target detection (IRSTD) has become a significant challenge due to the weak target, complex and variable backgrounds, and harsh imaging environments. Currently, most models are based on the U-net framework or its improved versions, but they often overlook the in-depth optimization of the output features. In response to this situation, this paper innovatively proposes a network specifically designed for this task, called UFNet-NSNP. The core of this network is its unique Ultra Fusion Net (UFNet), which efficiently integrates multiscale and multilevel features to significantly enhance the detail expressiveness of images. In addition, UFNet-NSNP introduces a novel Convolutional Attention Fusion Module (CAFM-SNP), which processes and further fuses the output features of the UFNet through cascaded Dilated convolutions and attention mechanisms to comprehensively enhance the global information capture capability of images. At the same time, the network has designed a nonlinear attention mechanism (NA) based on the nonlinear spiking mechanism, and by combining this mechanism with the spatial attention mechanism (SA), it has created a new attention module(NSNP-A). This module can enhance the nonlinear features of images. Experiments were conducted on the NUAA-SIRST and IRSTD-1k datasets. The experimental results show that UFNet-NSNP achieved an <span><math><mrow><mi>I</mi><mi>o</mi><mi>U</mi></mrow></math></span> of 77.46% on the NUAA-SIRST dataset and 69.21% on the IRSTD-1k dataset, it demonstrates superior comprehensive performance compared to existing state-of-the-art (SOTA) methods. The code will be available at <span><span>https://github.com/ZYX-111222/UFNet-NSNP</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"189 ","pages":"Article 113001"},"PeriodicalIF":4.6,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
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