Laser Physics Letters最新文献_第7页

Weighted monogamy and polygamy relations 加权一夫一妻制和一夫多妻制的关系

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-02-23 DOI: 10.1088/1612-202x/ad2921

Yue Cao, Naihuan Jing, Yiling Wang

引用次数: 0

Flexible preparation of the W state via the GRAPE algorithm in a nanoring-quantum-dot system 在纳米量子点系统中通过 GRAPE 算法灵活制备 W 态

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-02-22 DOI: 10.1088/1612-202x/ad2923

Zhen Chen, Zhi-Cheng Shi, Jie Song, Bi-Hua Huang, Yan Xia

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Sub-50 fs pulses generation from an all-fiber monolithic gain-managed nonlinear amplifier with CFBG-based pre-compressor 利用基于 CFBG 的预压缩器从全光纤单片增益管理非线性放大器生成 50 fs 以下脉冲

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-02-21 DOI: 10.1088/1612-202x/ad291f

Qianglong Li, Feng Li, Hongjun Liu, Wei Zhao, Xue Cao, Hualong Zhao, Yishan Wang, Wenlong Wen, Jinhai Si

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Quasi-classical dynamics of a charged particle under conditions of ionization losses in a weak magnetic field 带电粒子在弱磁场中电离损耗条件下的准经典动力学

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-02-21 DOI: 10.1088/1612-202x/ad2925

S V Sazonov

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Quench dynamics of a Tonks-Girardeau gas in one dimensional anharmonic trap 一维非谐波陷阱中唐克斯-吉拉尔多气体的淬火动力学

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-02-12 DOI: 10.1088/1612-202x/ad21eb

Pankaj Kumar Debnath, Barnali Chakrabarti, Mantile Leslie Lekala

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Knob of adjusting light group velocity in an inhomogeneously broadened degenerate two-level atomic medium by a magnetic field 用磁场调节不均匀拓宽的退化两级原子介质中的光群速度的旋钮

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-02-07 DOI: 10.1088/1612-202x/ad244a

Anh Nguyen Tuan, Thanh Thai Doan, Bang Nguyen Huy, Nga Luong Thi Yen, Dong Hoang Minh

引用次数: 0

THz transition radiation of electron bunches laser-accelerated in long-scale near-critical-density plasmas 长尺度近临界密度等离子体中激光加速的电子束太赫兹过渡辐射

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-02-01 DOI: 10.1088/1612-202x/ad21ed

D A Gorlova, I N Tsymbalov, I P Tsygvintsev, A B Savelev

{"title":"THz transition radiation of electron bunches laser-accelerated in long-scale near-critical-density plasmas","authors":"D A Gorlova, I N Tsymbalov, I P Tsygvintsev, A B Savelev","doi":"10.1088/1612-202x/ad21ed","DOIUrl":"https://doi.org/10.1088/1612-202x/ad21ed","url":null,"abstract":"Direct laser electron acceleration in near-critical density plasma produces collimated electron beams with high charge <italic toggle=\"yes\">Q</italic> (up to <italic toggle=\"yes\">µ</italic>C). This regime could be of interest for high-energy THz radiation generation, as many of the mechanisms have a scaling <inline-formula>\u0000<tex-math><?CDATA $propto Q^2$?></tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mo>∝</mml:mo><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>\u0000<inline-graphic xlink:href=\"lplad21edieqn1.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>. In this work, we focus specifically on the challenges that arise during numerical investigations of transition radiation in such interactions. Detailed analytical calculations that include both the diffraction and decoherence effects of the characteristics of transition radiation in the THz range were conducted with the input parameters obtained from 3D particle-in-cell and hydrodynamic simulations. The calculated characteristics of THz radiation are in good agreement with the experimentally measured ones. Therefore, this approach can be used both to optimize the properties of THz radiation and to distinguish the transition radiation contribution if several mechanisms of THz radiation generation are considered.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"110 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139757569","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

High-quality random bit generation based on a cascade-coupled nano-laser system 基于级联耦合纳米激光系统的高质量随机比特生成技术

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-01-29 DOI: 10.1088/1612-202x/ad1f4f

G P Liu, P H Mu, G Guo, X T Liu, G S Hu

引用次数: 0

Machine-learning-based mapping of blood oxygen saturation from dual-wavelength optoacoustic measurements 基于机器学习的双波长光声测量血氧饱和度绘图

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-01-19 DOI: 10.1088/1612-202x/ad1aa4

D A Kurakina, M Yu Kirillin, A V Khilov, V V Perekatova

{"title":"Machine-learning-based mapping of blood oxygen saturation from dual-wavelength optoacoustic measurements","authors":"D A Kurakina, M Yu Kirillin, A V Khilov, V V Perekatova","doi":"10.1088/1612-202x/ad1aa4","DOIUrl":"https://doi.org/10.1088/1612-202x/ad1aa4","url":null,"abstract":"We developed a novel machine-learning-based algorithm based on a gradient boosting regressor for three-dimensional pixel-by-pixel mapping of blood oxygen saturation based on dual-wavelength optoacoustic data. Algorithm training was performed on <italic toggle=\"yes\">in silico</italic> data produced from Monte-Carlo-generated absorbed light energy distributions in tissue-like vascularized media for probing wavelengths of 532 and 1064 nm and the empirical instrumental function of the optoacoustic imaging setup with further validation of the independent <italic toggle=\"yes\">in silico</italic> data. <italic toggle=\"yes\">In vivo</italic> optoacoustic data for rabbit-ear vasculature was employed as a testing dataset. The developed algorithm allowed <italic toggle=\"yes\">in vivo</italic> blood oxygen saturation mapping and showed clear differences in blood oxygen saturation values in veins at 15 °C and 43 °C due to functional arteriovenous anastomoses. These results indicated that dual-wavelength optoacoustic imaging could serve as a cost-effective alternative to complicated multiwavelength quantitative optoacoustic imaging.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"90 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139510160","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

Intracavity heterodyne laser interferometry. Studies of the features of optical Kerr effect in the atmosphere 腔内外差激光干涉仪。大气中光学克尔效应特征的研究

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-01-18 DOI: 10.1088/1612-202x/ad1aa9

V M Gelikonov, M A Novikov

{"title":"Intracavity heterodyne laser interferometry. Studies of the features of optical Kerr effect in the atmosphere","authors":"V M Gelikonov, M A Novikov","doi":"10.1088/1612-202x/ad1aa9","DOIUrl":"https://doi.org/10.1088/1612-202x/ad1aa9","url":null,"abstract":"The features of high-sensitivity frequency and phase measurements in a He–Ne gas laser at a wavelength of 0.63 <italic toggle=\"yes\">μ</italic>m are considered. The single-frequency mode of this laser with a large excess of the lasing threshold is implemented due to longitudinal mode selection using an ultra-thin nickel metal film placed in the standing field node of the cavity. With such an excess of the lasing threshold, the natural linewidth component is very small (∼10−3Hz), which was determined from the heterodyne method of measuring natural fluctuations of lasing frequency. This method can be used in combination with the multibeam intracavity interferometry for measuring phase modulation at a level of 10−9 rad Hz−1/2. To demonstrate the capabilities of the method, the electro-optical Kerr effect in air at atmospheric pressure in linearly polarized light was studied separately for extraordinary and ordinary waves. The Kerr and the Havelock constants were measured. A deviation from a purely quadratic dependence determined by the fourth power of the amplitude of a low-frequency electric field was found. A possible explanation of the detected deviation from the Kerr effect is the electrostriction.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"29 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139508180","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