Optics express最新文献_第2页

Apparatus and method for measuring individual color-matching functions. 测量单个配色功能的仪器和方法。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.536643

Luvin Munish Ragoo, Ivar Farup, Jan Henrik Wold

引用次数: 0

SSBI counteraction technology in a single photodetector-based direct detection system receiving an independent dual-single sideband signal. 基于单个光电探测器的直接检测系统中的 SSBI 反作用技术，可接收独立的双单边带信号。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.538293

Zheng Hu, Jiangnan Xiao, Yilin Chen, Jiabao Zhao, Feihan Li, Hangzhi Zhu

{"title":"SSBI counteraction technology in a single photodetector-based direct detection system receiving an independent dual-single sideband signal.","authors":"Zheng Hu, Jiangnan Xiao, Yilin Chen, Jiabao Zhao, Feihan Li, Hangzhi Zhu","doi":"10.1364/OE.538293","DOIUrl":"https://doi.org/10.1364/OE.538293","url":null,"abstract":"To further meet the large capacity, high spectrum efficiency (SE), reduce the signal-signal beat interference (SSBI) of the independent dual single sideband (ISB) system and the complexity of the receiver, we propose an iterative signal-signal beat interference counteraction (ISSBIC) algorithm to suppress SSBI. The 16-Gbps left sideband and the 16-Gbps right sideband signals in the ISB system are quadrature phase-shift keying (QPSK) modulated. After standard single-mode fiber (SSMF) transmission, the LSB and RSB signals are synthesized to a 16-quadrature amplitude modulation (QAM) signal after conversion through the photodetector (PD) square law. The simulation results show that the ISSBIC with just 2 iterations is superior to Kramers-Kronig (KK) receiver in processing the system error bit. In the meantime, the ISSBIC requires a sampling rate of 20GSa/s, whereas KK requires 40GSa/s. Moreover, the proposed ISSBIC algorithm has a simpler complexity. According to the simulation results, the suggested ISSBIC receiver can lower the ADC requirements and system costs, which opens up a wide range of applications in multiplex and higher SE transmission systems.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"32 23","pages":"41665-41676"},"PeriodicalIF":3.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142686577","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}

引用次数: 0

Chiral sensing via dielectric waveguide-nanoparticle array interactions. 通过介电波导-纳米粒子阵列的相互作用实现手性传感。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.538940

Hamed Nouri, Amir Nader Askarpour, Parisa Dehkhoda, Ahad Tavakoli

引用次数: 0

3D shape measurement method for high-reflective surface based on a color camera. 基于彩色相机的高反射表面三维形状测量方法。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.542643

Zhangying Wang, Kui Li, Nan Gao, Zhaozong Meng, Zonghua Zhang

{"title":"3D shape measurement method for high-reflective surface based on a color camera.","authors":"Zhangying Wang, Kui Li, Nan Gao, Zhaozong Meng, Zonghua Zhang","doi":"10.1364/OE.542643","DOIUrl":"https://doi.org/10.1364/OE.542643","url":null,"abstract":"Fringe projection profilometry (FPP) has been widely utilized in many fields due to its non-contact, high accuracy, high resolution and full-field measurement capabilities. However, the limited dynamic range of the camera sensor can result in overexposure of high-reflective parts in industrial production measurement. To effectively solve the above issue, this paper proposes a 3D shape measurement method for the high-reflective surface based on a color camera. Firstly, the optimal exposure time for the low-reflective region is estimated using the relationship between the standard variance of the phase error and the modulation. Twelve blue phase-shifted fringe patterns and a uniform blue image are utilized to obtain 3D shape of high-reflective surface. Secondly, captured images are separated into red, green and blue components. The fused Gaussian low-pass filtering method with different cut-off frequencies is used to filter and denoise the green or red components and the true intensity of the blue component in the saturated regions is calculated by the unsaturated intensity of the green or red components based on the calibrated crosstalk matrix. Then the image in saturated regions is fused and normalized with the unsaturated region. The absolute phase obtained from the fused normalized fringe patterns is converted into 3D data. Finally, experiments have been carried out on measuring. The experimental results show that the proposed method is capable of obtaining the 3D shape of the surface of a high-reflective object with fewer patterns and high measurement accuracy.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"32 23","pages":"41603-41618"},"PeriodicalIF":3.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142688341","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}

引用次数: 0

Stimulated Raman scattering and enhancement mechanisms in alkali metal hydroxide aqueous solutions under laser-induced dynamic pressure. 激光诱导动态压力下碱金属氢氧化物水溶液中的受激拉曼散射和增强机制。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.538171

Zhenguo Dou, Lu Xing, Haixin Wang, Wenhui Fang, Aijun Li, Erna Jia, Zhiwei Men

{"title":"Stimulated Raman scattering and enhancement mechanisms in alkali metal hydroxide aqueous solutions under laser-induced dynamic pressure.","authors":"Zhenguo Dou, Lu Xing, Haixin Wang, Wenhui Fang, Aijun Li, Erna Jia, Zhiwei Men","doi":"10.1364/OE.538171","DOIUrl":"https://doi.org/10.1364/OE.538171","url":null,"abstract":"Stimulated Raman scattering (SRS) in lithium hydroxide-water/heavy water (LiOH-H2O/D2O) solutions with varying concentrations was investigated under laser-induced high-pressure conditions using an Nd: YAG laser. The spectra revealed a significant enhancement in SRS signals, characterized by the emergence of low-wavenumber Raman peaks and a shift of the main SRS peak of liquid water to lower frequencies, evolving from a single peak to two or three peaks, which suggested the formation of an ice-like structure. Additionally, the normalized SRS intensity was higher than that of pure water. The enhancement of SRS signals during LiOH dissolution was attributed to the cooperative modulation between hydrogen bonding (HB, O-H:O) by OH- and Coulombic electronic interactions generated by monovalent Li+, which strengthened HB interactions, increased the Raman gain coefficient, and induced structural modifications akin to pressure effects. Besides, the increased density amplified the dynamic high-pressure effects during the laser-induced breakdown (LIB) process, further boosting the SRS signals. This work provides valuable insights into the interaction mechanisms between alkali metal hydroxides and H2O/D2O under laser-induced pressure conditions, offering a comprehensive approach to understanding and enhancing the SRS effect in aqueous solutions.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"32 23","pages":"40719-40729"},"PeriodicalIF":3.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142686763","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}

引用次数: 0

Pre- and post-compensation to suppress birefringent walk-off effects of entangled photons. 抑制纠缠光子双折射走散效应的前后补偿。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.532386

Tianxuan Feng, Rong Fan, Ronghua Fan, Conghao Wang, Chao Huang, Ang Li, Hanyi Zhang, Yin Cao, Lijing Li

引用次数: 0

High-precision dynamic axial clearance measurement method based on an all-fiber heterodyne microwave-AMCW with an all-phase tracking algorithm. 基于全光纤外差微波-AMCW 和全相跟踪算法的高精度动态轴向间隙测量方法。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.539286

Zhenxin Yu, Fajie Duan, Xiao Fu, Guangyue Niu, Jiajia Jiang

{"title":"High-precision dynamic axial clearance measurement method based on an all-fiber heterodyne microwave-AMCW with an all-phase tracking algorithm.","authors":"Zhenxin Yu, Fajie Duan, Xiao Fu, Guangyue Niu, Jiajia Jiang","doi":"10.1364/OE.539286","DOIUrl":"https://doi.org/10.1364/OE.539286","url":null,"abstract":"Rotor-stator axial clearance is critical to the safety and efficiency of major rotating machinery. However, factors such as high-speed rotation, narrow space, high temperature, and vibration present significant challenges for high-precision dynamic measurement of axial clearance. This paper proposes an axial clearance measurement method based on an all-fiber heterodyne microwave amplitude-modulated continuous wave (microwave-AMCW) system combined with an all-phase tracking algorithm, characterized by high precision, wide bandwidth, and a large measurement range. To mitigate environmental influences, a heterodyne all-fiber microwave-AMCW optical path structure is developed, and a compact dual-core fiber sensor probe is designed. The all-phase tracking algorithm is introduced to enhance dynamic precision and expand bandwidth. Additionally, what we believe to be a novel bandwidth test method based on time division multiplexing is proposed to evaluate the system's wide-bandwidth performance. The proposed system's performance is validated through simulations and experiments. The results demonstrate that the system exhibits excellent resistance to environmental interference, with a measurement range up to 24.5 mm and a static precision better than 4.5µm. Dynamic experiments further confirm the algorithm's effectiveness, achieving a precision better than 5.3µm at 100kHz bandwidth. Compared to other clearance measurement algorithms including the Hilbert transform and FFT, the proposed method reduces dynamic error by over 74%.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"32 23","pages":"40945-40966"},"PeriodicalIF":3.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142688366","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}

引用次数: 0

Simultaneous detection of soot, temperature, and C₂H₂ in laminar premixed flames using a multi-pass diode laser absorption spectrometer. 使用多通道二极管激光吸收光谱仪同时检测层流预混合火焰中的烟尘、温度和 C2H2。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.539731

Wenjian Huang, Guangzhen Gao, Mingke Zhang, Shujing Ruan, Tingdong Cai

{"title":"Simultaneous detection of soot, temperature, and C2H2 in laminar premixed flames using a multi-pass diode laser absorption spectrometer.","authors":"Wenjian Huang, Guangzhen Gao, Mingke Zhang, Shujing Ruan, Tingdong Cai","doi":"10.1364/OE.539731","DOIUrl":"https://doi.org/10.1364/OE.539731","url":null,"abstract":"We report the development of a multi-pass diode laser absorption spectroscopy system for simultaneous measurements of soot volume fraction (SVF), temperature, and C2H2 concentration using a single diode laser near 1.543 µm. A line-shaped beam spot pattern is chosen for the open-path Herriott multi-pass cavity, enabling sensitive detection at various heights above the burner with an effective optical absorption path length of approximately 1.2 m in a 6 cm diameter flame region. The gas parameters (temperature and C2H2 concentration) and the SVF are determined from the absorption spectra of the target C2H2 line pair and the laser extinction of the soot, which can be extracted from the detected signal, respectively. The performance of the system was confirmed in laminar premixed ethylene and air (C2H4/air) sooting flames produced by a standard bronze plug McKenna burner at four representative equivalence ratios. All the measurement results were compared with the two-dimensional (2D) computational fluid dynamics (CFD) simulations using a skeletal mechanism with the Moss-Brookes model. The good quantitative and qualitative agreement between the TDLAS measurements and 2D CFD simulations confirms the powerful capability of the developed system.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"32 23","pages":"41445-41461"},"PeriodicalIF":3.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142688412","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}

引用次数: 0

Zero-UMSIE: a zero-shot underwater multi-scale image enhancement method based on isomorphic features. Zero-UMSIE：基于同构特征的零镜头水下多尺度图像增强方法。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.538120

Tong Liu, Kaiyan Zhu, Weiye Cao, Bolin Shan, Fangyi Guo

{"title":"Zero-UMSIE: a zero-shot underwater multi-scale image enhancement method based on isomorphic features.","authors":"Tong Liu, Kaiyan Zhu, Weiye Cao, Bolin Shan, Fangyi Guo","doi":"10.1364/OE.538120","DOIUrl":"https://doi.org/10.1364/OE.538120","url":null,"abstract":"Due to the scattering and absorption of light, underwater images often exhibit degradation. Given the scarcity of paired real-world data and the inability of synthetic paired data to perfectly approximate real-world data, it's a challenge to restore these degraded images using deep neural networks. In this paper, a zero-shot underwater multi-scale image enhancement method (Zero-UMSIE) is proposed, which utilizes the isomorphism between the original underwater image and the re-degraded image. Specifically, Zero-UMSIE first estimates three latent components of the original underwater image: the global background light, the transmission map, and the scene radiance. Then, the estimated scene radiance is randomly mixed with the original underwater image to generate re-degraded images. Finally, a multi-scale loss and a set of tailored non-reference loss functions are employed to fine-tune the underwater image and enhance the generalization ability of the network. These functions implicitly control the learning preferences of the network and effectively address issues such as color bias and uneven illumination in underwater images, without the need for additional datasets. The proposed method is evaluated on three widely used real-world underwater image datasets. Extensive experiments on various benchmarks demonstrate that the proposed method is superior to state-of-the-art methods subjectively and objectively, which is competitive and applicable to diverse underwater conditions.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"32 23","pages":"40398-40415"},"PeriodicalIF":3.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142688163","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}

引用次数: 0

Cylindrical aperture three-dimensional synthetic aperture imaging with pulsed terahertz waves. 利用脉冲太赫兹波进行圆柱孔径三维合成孔径成像。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2024-11-04 DOI: 10.1364/OE.534854

Yuanhao Du, Hui Feng, Shuai Wu

{"title":"Cylindrical aperture three-dimensional synthetic aperture imaging with pulsed terahertz waves.","authors":"Yuanhao Du, Hui Feng, Shuai Wu","doi":"10.1364/OE.534854","DOIUrl":"https://doi.org/10.1364/OE.534854","url":null,"abstract":"In this paper, we report a three-dimensional synthetic aperture imaging method with pulsed terahertz waves realized by a terahertz time-domain spectrometer. In contrast to synthetic aperture imaging systems operating at microwave or millimeter-wave frequencies where the frequency of the transmitter is scanned in the frequency domain, in our imaging system, all the frequency components are contained in a single terahertz pulse that can be generated and detected by photoconductive antennas. The image algorithm was analyzed theoretically and confirmed numerically using the finite-difference time-domain method. A key with plentiful detailed structures was used as the object to be imaged to demonstrate the three-dimensional imaging capabilities of this method. The resolution of the imaging system is 0.3 mm for the linear dimension and 0.1 mm for the circular dimension, as tested by the experimental setup. Finally, an optically opaque plastic pen with and without the cartridge was imaged, and the shape and location of the cartridge could be observed from the reconstructed three-dimensional terahertz images, demonstrating the non-destructive evaluation capabilities of this imaging method. Benefiting from the improvements in the experimental setup in this study, the imaging speed was significantly improved compared with that of the step-by-step scanning method commonly used in terahertz imaging systems with a single transmitter/receiver pair. This imaging method avoids the image degradation caused by specular reflections in active quasi-optical focal plane imaging and the lack of semiconductor devices working at several THz frequencies for synthetic aperture imaging, and may be used for non-destructive evaluation of objects with complex surfaces and internal structures.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"32 23","pages":"40190-40201"},"PeriodicalIF":3.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142688176","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}

引用次数: 0