Applied Physics B最新文献_第6页

Monolithic Y-branch distributed Bragg reflector diode laser at 633 nm for shifted excitation Raman difference spectroscopy 单片y支分布布拉格反射二极管激光器在633 nm的位移激发拉曼差分光谱

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-07-07 DOI: 10.1007/s00340-025-08520-0

Aghigh Jalehdoost, Kay Sowoidnich, André Müller, David Feise, Katrin Paschke, Bernd Sumpf, Martin Maiwald

{"title":"Monolithic Y-branch distributed Bragg reflector diode laser at 633 nm for shifted excitation Raman difference spectroscopy","authors":"Aghigh Jalehdoost, Kay Sowoidnich, André Müller, David Feise, Katrin Paschke, Bernd Sumpf, Martin Maiwald","doi":"10.1007/s00340-025-08520-0","DOIUrl":"10.1007/s00340-025-08520-0","url":null,"abstract":"<div><p>A dual-wavelength monolithic Y-branch distributed Bragg reflector diode laser at 633 nm is presented, which is suitable for shifted excitation Raman difference spectroscopy to effectively address fluorescence and background interference. The device provides 30 mW optical output power at an electrical power consumption of less than 1 W. At a spectral distance of 0.4 nm (10 cm<sup>−1</sup>), both laser emission wavelengths show narrowband operation with spectral widths of 12 pm (0.3 cm<sup>−1</sup>) and side mode suppression ratios of more than 40 dB. Performing shifted excitation Raman difference spectroscopy measurements on a highly fluorescent soil sample exemplarily showed the efficient separation of characteristic Raman signals of the soil constituents quartz and calcite from intense fluorescence interference with a 17-fold improvement in the signal-to-background noise ratio in comparison to the individual Raman measurements.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08520-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Influence of non-uniform distribution of doped atoms in semiconductors on high-order harmonic generation 半导体中掺杂原子不均匀分布对高次谐波产生的影响

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-07-05 DOI: 10.1007/s00340-025-08509-9

Can Wang, Zhuo-Xuan Xie, Ling-Yu Zhang, Le Wei, Jing Guo

引用次数: 0

Highly sensitive fiber sensor for detecting magnetic field, displacement and temperature 高灵敏度光纤传感器，用于检测磁场，位移和温度

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-07-03 DOI: 10.1007/s00340-025-08516-w

Peijia Tian, Yuge Wang, Zhiyu Wu, Jiajun Li, Yong Feng, Chunbo Su, Tao Geng, Yanlei Liu

引用次数: 0

Anisotropy of optical and thermooptical properties of monoclinic Yb3+:Gd2−xYxSiO5 laser crystal 单斜Yb3+:Gd2−xYxSiO5激光晶体光学和热光学性质的各向异性

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-07-03 DOI: 10.1007/s00340-025-08518-8

К.V. Yumashev, A. V. Hertsova, A. I. Lazarchuk, T. A. Shishko, V. E. Kisel

引用次数: 0

Terahertz plasmon intersubband laser based on an electron-enriched GaAs/AlGaAs heterojunction 基于富电子GaAs/AlGaAs异质结的太赫兹等离子体子带间激光器

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-30 DOI: 10.1007/s00340-025-08511-1

A. A. Afonenko, D. V. Ushakov, A. A. Dubinov

引用次数: 0

Real-time masking in photonic reservoir computing based on semiconductor lasers 基于半导体激光器的光子库计算中的实时掩蔽

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-30 DOI: 10.1007/s00340-025-08513-z

Jiahao Chen, Yushuang Hou, Xiaoyu Guo, Qiudi Li, Siyu Li, Chuanlong Guo, Dianzuo Yue

{"title":"Real-time masking in photonic reservoir computing based on semiconductor lasers","authors":"Jiahao Chen, Yushuang Hou, Xiaoyu Guo, Qiudi Li, Siyu Li, Chuanlong Guo, Dianzuo Yue","doi":"10.1007/s00340-025-08513-z","DOIUrl":"10.1007/s00340-025-08513-z","url":null,"abstract":"<div><p>Photonic reservoir computing (RC) based on semiconductor lasers (SLs) has gained significant attention due to its simplicity, fast training, and low energy consumption. However, the reliance on offline masking at the input layer limits its application in real-time tasks. In this work, we propose and numerically investigate a real-time masking method for photonic RC system using an SL subjected to optical feedback and sinusoidal modulation. The mask signal is injected into a Mach–Zehnder modulator alongside input data, enabling real-time masking. We analyze the nonlinear dynamics of the mask-SL and identify optimal parameters for mask signal generation. The system demonstrates robust predictive performance for the Santa Fe time series (minimum NMSE = 0.033) and high memory capacity (MC), with MC values reaching up to 20 in specific parameter regions. Although the real-time masking RC system exhibits slight performance degradation compared to conventional offline masking (NMSE = 0.01, MC = 23) and requires additional parameter tuning for mask generation, it provides a viable solution for real-time data processing in photonic RC implementations.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145263","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}

引用次数: 0

Online measurement of hydrogen/air flame equivalence ratio using femtosecond laser-induced plasma spectroscopy 利用飞秒激光诱导等离子体光谱在线测量氢气/空气火焰等效比

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-27 DOI: 10.1007/s00340-025-08517-9

Zheng Lu, Zhifeng Zhu, Xiaofeng Li, Lei Zhang, Tengfei Wu, Lei Han, Qiang Gao, Bo Li

{"title":"Online measurement of hydrogen/air flame equivalence ratio using femtosecond laser-induced plasma spectroscopy","authors":"Zheng Lu, Zhifeng Zhu, Xiaofeng Li, Lei Zhang, Tengfei Wu, Lei Han, Qiang Gao, Bo Li","doi":"10.1007/s00340-025-08517-9","DOIUrl":"10.1007/s00340-025-08517-9","url":null,"abstract":"<div><p>With the growing application of hydrogen as a clean energy source, the development of accurate, real-time, and multi-dimensional equivalence ratio measurement for hydrogen combustion has become imperative. This is critical for combustion control, optimization of hydrogen engine efficiency, and reduction of nitrogen oxide emissions. Here, we used femtosecond laser-induced plasma spectroscopy to perform online measurements of the equivalence ratio in H<sub>2</sub>/air premixed flames. First, calibration experiments were conducted to establish a quantitative relationship between spectral signals of H<sub>656</sub>/O<sub>777</sub> and equivalence ratios of H<sub>2</sub>/air premixed flames. Based on the calibration curve, 1D online equivalence ratio measurements were performed in both laminar and turbulent premixed flames. Furthermore, local equivalence ratio measurements at different heights were carried out to analyze the spatial distribution of the equivalence ratio in the jet flame. These results were compared with the corresponding ANSYS FLUENT simulation data, showing a good agreement in the trend of the equivalence ratio distribution. This study not only provides a new tool for fundamental research in hydrogen combustion but also offers technical support for future numerical simulations and engineering applications related to hydrogen combustion.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145378","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}

引用次数: 0

Dual parametric simultaneous measurement based on ring-core fiber based MZI cascaded with FBG 基于环芯光纤级联光纤光栅的双参数同步测量

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-25 DOI: 10.1007/s00340-025-08514-y

Wenjie Nie, Jie Du, Qishuang Zhang, Ying Wang, Ziyan Ren, Qiang Ling, Zhengtian Gu, Yusheng Zhang, Xiuli Jiang, Zhangwei Yu, Daru Chen

{"title":"Dual parametric simultaneous measurement based on ring-core fiber based MZI cascaded with FBG","authors":"Wenjie Nie, Jie Du, Qishuang Zhang, Ying Wang, Ziyan Ren, Qiang Ling, Zhengtian Gu, Yusheng Zhang, Xiuli Jiang, Zhangwei Yu, Daru Chen","doi":"10.1007/s00340-025-08514-y","DOIUrl":"10.1007/s00340-025-08514-y","url":null,"abstract":"<div><p>In the paper, we proposed and experimentally demonstrated a novel sensor for dual parametric simultaneous measurement based on ring-core fiber (RCF)-Mach–Zehnder interferometer (MZI) cascaded with Fiber Bragg grating (FBG). By splicing single mode fibers (SMFs) at both ends of the RCF, two up-taper structures are formed, which act as a beam splitter and a coupler in the MZI, respectively. The experiment proves that the RCF-based MZI has sensitivities of curvature in the range from 0 to 1.71 m<sup>−1</sup> and temperature in the range from 30 to 90℃ of this measurement are − 1.25 nm/m<sup>−1</sup> and 0.061 nm/℃ while the fitting coefficients are 0.978 and 0.994. The FBG, as a temperature monitor, has no responding to curvature changing, and the temperature sensitivity of 0.0097 nm/℃. The coefficient matrix method is used to measure the curvature and temperature simultaneously, and the problem of temperature cross sensitivity is eliminated. Not only is the sensor capable of simultaneously measuring both curvature and temperature through a straightforward fabrication process, but this sensor has the advantages of high sensitivity, compact structure, low cost and simple fabrication, which makes it have a further application prospect in industrial production.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144977","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}

引用次数: 0

Thermally stable, high-sensitivity π-phase shifted long period fiber gratings near turn around point for dual parameter sensing 热稳定，高灵敏度π移相长周期光纤光栅近旋转点的双参数传感

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-24 DOI: 10.1007/s00340-025-08515-x

R. Mahakud, S. Kumar, J. Kumar, V. K. Srivastava, O. Prakash

{"title":"Thermally stable, high-sensitivity π-phase shifted long period fiber gratings near turn around point for dual parameter sensing","authors":"R. Mahakud, S. Kumar, J. Kumar, V. K. Srivastava, O. Prakash","doi":"10.1007/s00340-025-08515-x","DOIUrl":"10.1007/s00340-025-08515-x","url":null,"abstract":"<div><p>This paper presents a novel technique to develop high sensitive and thermally stable π-phase shifted long period gratings (π-PS-LPGs) near turn around point (TAP) in photosensotive fibers, in air and water like environments. The analysis and experimental results showed that evolution and wavelength tuning of loss bands in a π-PS-LPG are highly dependent on change photo-induced refractive index (RI), which grows by UV fluence and decays by thermal relaxation. The wavelength tunability is of the order of 100–200 nm, depends on grating period and wavelength separation of the loss band from TAP. Enhanced thermal stabilty PS-LPGs near TAP were fabricated by annealing of the PS-LPGs written with high UV fluence. The experiments on spectral evolution of two loss bands in a π-PS-LPG near TAP revealed significant difference in their sensitivities, both to change in temperature and surrounding refractive index (SRI). This study provides valuable insights for design and development of thermally stable π-PS-TAP-LPGs in water-like environments, as biochemical sensors for simultaneous measurements of temperature and surrounding refractive index (SRI).</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08515-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

A practical guide to feedback control for Pound–Drever–Hall laser linewidth narrowing 庞德-德雷弗-霍尔激光线宽变窄反馈控制的实用指南

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-24 DOI: 10.1007/s00340-025-08490-3

Wance Wang, Sarthak Subhankar, Joseph W. Britton

{"title":"A practical guide to feedback control for Pound–Drever–Hall laser linewidth narrowing","authors":"Wance Wang, Sarthak Subhankar, Joseph W. Britton","doi":"10.1007/s00340-025-08490-3","DOIUrl":"10.1007/s00340-025-08490-3","url":null,"abstract":"<div><p>The Pound–Drever–Hall (PDH) technique for laser linewidth narrowing is widely used by AMO experimentalists. However, achieving a high-performance PDH locking requires substantial engineering experience, which is scattered across literature and often lacks a cohesive control-theory perspective. Excellent pedagogical papers exist on the theory of the PDH error signal (Black in Am J Phys 69:79, 2000; Day et al. in IEEE J Quantum Electron 28:1106, 1992; Thorpe et al. in Opt Express 16:15980, 2008; Reinhardt et al. in Opt Express 25:1582, 2017), but they rarely cover feedback control. General-purpose control theory literature (Bechhoefer in Rev Mod Phys 77:783, 2005; Ogata in Modern control engineering. Pearson Education, London, 2010) seldom discusses PDH laser locking specifically. Although excellent PDH review articles (Hall et al. in Handbook of optics. McGraw-Hill Professional, New York, 1999; Fox et al. in Stabilizing diode lasers to high-finesse cavities. National Institute of Standards and Technology, Boulder 2003; Nagourney in Quantum electronics for atomic physics and telecommunication. Oxford University Press, Oxford 2014) provide thorough knowledge and practice on both aspects, they are not novice-friendly. We extend prior works (Hall et al. 1999; Fox et al. 2003; Nagourney 2014) by addressing component choice and loop tuning using modern tools like a vector network analyzer. We organize multifaceted engineering considerations systematically, grounded in feedback control principles. Our target reader is researchers setting up a PDH laser lock for the first time; we eschew advanced topics like minimizing residual amplitude modulation (RAM). Our guidance is illustrated by step-by-step optimization of the lock for a 1650 nm ECDL.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08490-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0