Laser Physics Letters最新文献_第4页

Average coherence and average correlated coherence as indicators of quantum phase transitions in the XY model with staggered Dzyaloshinskii-Moriya interaction 平均相干性和平均相关相干性作为具有交错 Dzyaloshinskii-Moriya 相互作用的 XY 模型中量子相变的指标

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-06-25 DOI: 10.1088/1612-202x/ad59fd

Gan-Lu Li and Yu-Xia Xie

引用次数: 0

Bell inequality violation in relativity theory 相对论中的贝尔不等式违反

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-06-24 DOI: 10.1088/1612-202x/ad552d

A V Belinsky and I I Dzhadan

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Cryptographic computer generated hologram watermarking technology based on DWT-SVD 基于 DWT-SVD 的加密计算机生成全息图水印技术

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-06-20 DOI: 10.1088/1612-202x/ad51e3

Songxiao Liu, Nana Yu, Xiangxiang Ji, Danying Song, Sixing Xi, Zhuqing Zhu, Xiaolei Wang and Liying Lang

{"title":"Cryptographic computer generated hologram watermarking technology based on DWT-SVD","authors":"Songxiao Liu, Nana Yu, Xiangxiang Ji, Danying Song, Sixing Xi, Zhuqing Zhu, Xiaolei Wang and Liying Lang","doi":"10.1088/1612-202x/ad51e3","DOIUrl":"https://doi.org/10.1088/1612-202x/ad51e3","url":null,"abstract":"To improve the security and invisibility of image encryption and concealment, an encrypted computer generated hologram (CGH) watermarking technology based on discrete wavelet transform (DWT) and singular value decomposition (SVD) is proposed. Firstly, the image to be encrypted is encoded and converted into a binary real-valued CGH. The encrypted CGH is then embedded into the host image as a watermark, implementing image encryption and concealment. During decryption, the encrypted CGH watermark is first extracted using the inverse DWT-SVD and the correct keys. Subsequently, the decrypted image is obtained by applying the correct optical key for computational holographic reproduction. The method introduces computational holographic coding and optical keys into the digital watermarking technique and combines the characteristics of DWT and SVD, solving the problem of the high false positive rate of the SVD algorithm. Simulation results show that the security of image encryption and concealment is greatly improved with the introduction of CGH into watermarking technology, especially in terms of robustness to watermark attacks and noise. This method can be applied in the fields of copyright protection and anti-counterfeiting for digital and printed images.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"9 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501483","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

Molten fluoride salt-assisted synthesis of titanium carbide (Ti2C) MXene and its application for 2 µm mode-locking in a thulium-doped fiber laser 熔融氟化盐辅助合成碳化钛 (Ti2C) MXene 及其在掺铥光纤激光器 2 µm 模式锁定中的应用

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-06-18 DOI: 10.1088/1612-202x/ad552b

Harith Ahmad, Aizuddin Ahmad Kamely, Muhamad Zharif Samion, Bilal Nizamani, Siti Aisyah Reduan and Kavintheran Thambiratnam

{"title":"Molten fluoride salt-assisted synthesis of titanium carbide (Ti2C) MXene and its application for 2 µm mode-locking in a thulium-doped fiber laser","authors":"Harith Ahmad, Aizuddin Ahmad Kamely, Muhamad Zharif Samion, Bilal Nizamani, Siti Aisyah Reduan and Kavintheran Thambiratnam","doi":"10.1088/1612-202x/ad552b","DOIUrl":"https://doi.org/10.1088/1612-202x/ad552b","url":null,"abstract":"Titanium carbide (Ti2C), a new two-dimensional material named MXenes, has attracted interest due to its potential applications in numerous fields. Of the many unique characteristics of Ti2C MXene, its nonlinear properties are attractive for optoelectronic applications, specifically for ultrafast laser generation. In this work, a Ti2C MXene was fabricated by etching a MAX phase precursor titanium aluminum carbide (Ti2AlC) using a mixture of lithium fluoride and hydrochloric acid, eliminating the risk of using the harmful hydrofluoric acid. The Ti2C MXene was prepared in solution form and then dropped onto a reduced core diameter of tapered fiber before being used as a saturable absorber (SA). The SA device was inserted into a thulium-doped fiber laser to generate stable mode-locked pulses at a center wavelength of 1951 nm with a pulse width of 1.67 ps. The mode-locked laser was highly stable when tested over time, with peak optical power fluctuations of as little as 0.005 dB measured. The results show that the Ti2C MXene exhibit outstanding performance for ultrafast laser generation.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"45 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501485","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

Quasi-monoenergetic electron beam from LWFA: analytical approach 来自 LWFA 的准单能电子束：分析方法

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-06-04 DOI: 10.1088/1612-202x/ad4eb4

E M Starodubtseva, I N Tsymbalov, D A Gorlova, K A Ivanov and A B Savelev

引用次数: 0

Orthogonally polarized dual-wavelength Pr:LiGdF4 lasers in the green range 绿色范围内的正交偏振双波长 Pr:LiGdF4 激光器

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-05-30 DOI: 10.1088/1612-202x/ad4bb9

Chong Chen, Yongliang Li, Jiawei Shangguan, Hailong Feng and Haoran Guo

引用次数: 0

Multi-party semi-quantum secret sharing protocol based on measure-flip and reflect operations 基于量子翻转和反射操作的多方半量子秘密共享协议

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-05-29 DOI: 10.1088/1612-202x/ad4eb6

Jian Li and Chong-Qiang Ye

{"title":"Multi-party semi-quantum secret sharing protocol based on measure-flip and reflect operations","authors":"Jian Li and Chong-Qiang Ye","doi":"10.1088/1612-202x/ad4eb6","DOIUrl":"https://doi.org/10.1088/1612-202x/ad4eb6","url":null,"abstract":"Semi-quantum secret sharing (SQSS) protocols serve as fundamental frameworks in quantum secure multi-party computations, offering the advantage of not requiring all users to possess intricate quantum devices. However, current SQSS protocols mainly cater to bipartite scenarios, with few protocols suitable for multi-party scenarios. Moreover, the multi-party SQSS protocols face limitations such as low qubit efficiency and inability to share deterministic secret information. To address this gap, this paper proposes a multi-party SQSS protocol based on multi-particle GHZ states. In this protocol, the quantum user can distribute the predetermined secret information to multiple classical users with limited quantum capabilities, and only through mutual cooperation among all classical users can the correct secret information be reconstructed. By utilizing measure-flip and reflect operations, the transmitted multi-particle GHZ states can all contribute keys, thereby improving the utilization of transmitted particles. Then, security analysis shows that the protocol’s resilience against prevalent external and internal threats. Additionally, employing IBM Qiskit, we conduct quantum circuit simulations to validate the protocol’s accuracy and feasibility. Finally, compared to similar studies, the proposed protocol has advantages in terms of protocol scalability, qubit efficiency, and shared message types.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"13 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141188045","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 tightness of the measure-based method to estimate quantum coherence 基于度量的量子相干性估算方法的严密性

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-05-16 DOI: 10.1088/1612-202x/ad485a

Zimeng Zhang, Yongming Li and Yu Luo

引用次数: 0

Stimulated magneto-optics with different detunings for plasma local diagnostics 用于等离子体局部诊断的不同调谐的受激磁光技术

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-05-08 DOI: 10.1088/1612-202x/ad45da

K B Oganesyan, K Dzierzega, A H Gevorgyan, P Kopcansky

引用次数: 0

Image ciphertexts classification method based on ghost imaging and intraclass-interclass difference 基于鬼影成像和类内类间差异的图像密码文本分类方法

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-05-08 DOI: 10.1088/1612-202x/ad45d8

Dan Zhao, Yue Li, Jialin Zhang, Yang Liu, Mingze Sun, Xinjia Li, Zhan Yu, Ying Li, Sheng Yuan, Xin Zhou

{"title":"Image ciphertexts classification method based on ghost imaging and intraclass-interclass difference","authors":"Dan Zhao, Yue Li, Jialin Zhang, Yang Liu, Mingze Sun, Xinjia Li, Zhan Yu, Ying Li, Sheng Yuan, Xin Zhou","doi":"10.1088/1612-202x/ad45d8","DOIUrl":"https://doi.org/10.1088/1612-202x/ad45d8","url":null,"abstract":"In this paper, based on ghost imaging encryption, the preservation of Manhattan distance feature in ciphertext compared with plaintext is analyzed by utilizing the intraclass-interclass difference of image classification, and a classification method for image ciphertexts is proposed. After calculating Manhattan distance for both plaintexts and ciphertexts, respectively, the intraclass-interclass difference can be determined. The image that minimizes the intraclass-interclass difference is taken as the centroid to verify the consistency of the classification for various plaintext-ciphertext pairs under the same operation. The feasibility of proposed method is verified by numerical simulations, that the values of ACC and Weighted-<italic toggle=\"yes\">F</italic>2 can be up to 90% when the MNIST is adopted as the test dataset. The whole process can be regarded as a kind of classification process by homomorphic encryption, however, different from the traditional homomorphic encryption methods based on mathematical model, the proposed method is accomplished based on the optical theory, and it does not require a lot of pre-training through models such as deep learning and neural networks, that means, reducing the computational expenses.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"44 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140937893","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