Optics express最新文献_第10页

DDSSnet: a fast strain demodulation approach for OFDR-based fiber shape reconstruction. DDSSnet：基于ofdr的光纤形状重建的快速应变解调方法。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.550444

Aoyan Zhang, Weixuan Zhang, Linqi Cheng, Defeng Zou, Penglai Guo, Jiaqi Hu, Kunpeng Feng, Yihong Xiao, Jialong Li, Gina Jinna Chen, Hong Dang, Perry Ping Shum

{"title":"DDSSnet: a fast strain demodulation approach for OFDR-based fiber shape reconstruction.","authors":"Aoyan Zhang, Weixuan Zhang, Linqi Cheng, Defeng Zou, Penglai Guo, Jiaqi Hu, Kunpeng Feng, Yihong Xiao, Jialong Li, Gina Jinna Chen, Hong Dang, Perry Ping Shum","doi":"10.1364/OE.550444","DOIUrl":"https://doi.org/10.1364/OE.550444","url":null,"abstract":"In optical fiber shape sensing technology, enhancing sensing accuracy while simultaneously achieving real-time shape reconstruction presents a notable challenge. This work presents a fast strain demodulation algorithm for the optical frequency domain reflectometry (OFDR) shape sensing system. The fast strain demodulation algorithm comprises deviation calculation and deviation denoising for shape-sensing convolutional neural network (DDSSnet). The initial operating wavelengths of the shape sensor can be effectively calibrated and the phase noise of residual nonlinear tuning in the system can also be compensated. Compared with the cross-correlation algorithm, the fast strain demodulation algorithm has increased the processing speed of demodulating axial strain distribution by 9.691 times and a shape-sensing result by 9.4 times. The shape of one cylinder and one configuration were then reconstructed using the rotation-minimum frame, resulting in maximum relative errors of 0.581% and 1.170%, respectively, and average relative errors of 0.204% and 0.380%, respectively. These errors are all slightly smaller than those obtained using the cross-correlation algorithm. The results from the shape-sensing experiments indicate that this method enables both faster and more accurate shape reconstruction, offering promising potential for practical applications.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 7","pages":"14640-14654"},"PeriodicalIF":3.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144011061","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

Accurate and noise robust crosstalk removal techniques for edge illumination phase-based x-ray imaging systems. 边缘照明相位x射线成像系统的精确和噪声鲁棒串扰去除技术。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.551760

Andrea Mazzolani, Alberto Astolfo, Ian Buchanan, Savvas Savvidis, Marius Didziokas, Mehran Moazen, Luca Fardin, Peter R T Munro, Alessandro Olivo

引用次数: 0

Self-calibration method for spiral CT geometric parameters based on data redundancy conditions. 基于数据冗余条件的螺旋CT几何参数自标定方法。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.559208

Bozhong Tan, Jinming Cheng, Qingguo Yang

{"title":"Self-calibration method for spiral CT geometric parameters based on data redundancy conditions.","authors":"Bozhong Tan, Jinming Cheng, Qingguo Yang","doi":"10.1364/OE.559208","DOIUrl":"https://doi.org/10.1364/OE.559208","url":null,"abstract":"The geometric parameters of the CT system significantly influence the quality of reconstructed images and the accuracy of dimensional measurements. To achieve precise calibration of these parameters, this study develops a self-calibration method for spiral CT geometry based on data redundancy conditions. Theoretical analysis is conducted to identify the geometric relationships that satisfy data redundancy under spiral scanning trajectories. Using simulation data, we investigate the effects of three key geometric parameters-the source-to-sample distance, the horizontal offset of the detector, and the rotation angle in detector plane-on data redundancy. Additionally, we examine how varying noise levels impact the accuracy of geometric parameter estimation. Finally, the proposed method is validated through spiral CT scanning experiments with real samples. Results show that the calculation accuracy for the detector's horizontal offset is better than 1 pixel, the rotation angle in detector plane accuracy exceeds 0.1°, and the source-to-sample distance accuracy surpasses 0.42%. These findings confirm the effectiveness of the proposed method in practical applications.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 7","pages":"15964-15974"},"PeriodicalIF":3.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144034858","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

Yellow stimulated emission from Dy³⁺-doped silica glass microspheres. 掺Dy3+二氧化硅玻璃微球的黄色受激辐射。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.553978

Abhishek Sureshkumar, Jonathan Demaimay, Georges Perin, Shahaz Hameed, Mohammed Guendouz, Hélène Ollivier, Yannick Dumeige, Pavel Loiko, Gurvan Brasse, Alain Braud, Patrice Camy, Stéphane Trebaol

{"title":"Yellow stimulated emission from Dy3+-doped silica glass microspheres.","authors":"Abhishek Sureshkumar, Jonathan Demaimay, Georges Perin, Shahaz Hameed, Mohammed Guendouz, Hélène Ollivier, Yannick Dumeige, Pavel Loiko, Gurvan Brasse, Alain Braud, Patrice Camy, Stéphane Trebaol","doi":"10.1364/OE.553978","DOIUrl":"https://doi.org/10.1364/OE.553978","url":null,"abstract":"Dy3+-doped silica glass whispering gallery mode microspheres are fabricated by fiber fusion splicing. They present an almost ideal spherical morphology with a radius ranging from 60 to 67 µm, as determined by confocal laser microscopy. The host composition of the microsphere is close to that of the fiber core. The dopant Dy3+ ions are uniformly distributed across the microsphere, as evidenced by µ-luminescence studies, and present a luminescence lifetime of the 4F9/2 state of 514.7 ± 1.1 µs, indicating a weak luminescence quenching. The Dy3+-doped glass microspheres were excited via evanescent field coupling using a half-tapered fiber and a blue 450-nm GaN laser diode (direct pumping scheme). The yellow fluorescence of Dy3+ ions (the 4F9/2 → 6H13/2 transition) is filtered by the whispering gallery modes (free spectral range: 0.5 nm for 67-µm radius microsphere). The onset of stimulated emission is further observed, highlighting the potential of such microresonators for narrow-linewidth light sources directly emitting visible light.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 7","pages":"15802-15813"},"PeriodicalIF":3.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144037509","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

Prism-based self-calibration virtual cameras to generate rotating view fields for 6DOF pose measurement. 基于棱镜的自校准虚拟摄像机，生成旋转视场，用于6DOF姿态测量。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.559610

Zhaojun Deng, Anhu Li

引用次数: 0

Enantiomeric concentration determination via a single circular dichroism spectrum in chiral hyperbolic metamaterials. 手性双曲超材料中对映体浓度的单圆二色光谱测定。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.559709

Houjiao Zhang, Zhonghong Shi, Jiancai Xue, Haoyang Li, Shuang Qiu, Changda Zhou, Zhang-Kai Zhou

引用次数: 0

Broadband wavelength-tunable enhanced light emission based on graphene MEMS. 基于石墨烯MEMS的宽带波长可调谐增强光发射。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.543985

Hui Yang, Anrun Yang, Yinglong Huang, Wenyong Liu, Jiangtao Liu, MengHui Fan, Zhenhua Wu

{"title":"Broadband wavelength-tunable enhanced light emission based on graphene MEMS.","authors":"Hui Yang, Anrun Yang, Yinglong Huang, Wenyong Liu, Jiangtao Liu, MengHui Fan, Zhenhua Wu","doi":"10.1364/OE.543985","DOIUrl":"https://doi.org/10.1364/OE.543985","url":null,"abstract":"The modulation of light emission in a composite structure of a graphene microelectromechanical system (MEMS) and a photonic crystal microcavity is investigated theoretically. By suspending photonic crystal structures on graphene ribbons and applying a driving voltage to control the cavity length of the microcavity, the radiation intensity of light at different wavelengths can be enhanced, while the radiation intensity of light at other wavelengths can be suppressed. The numerical results show that the device has a tunable wavelength range greater than 200 nm or a tunable frequency range greater than 200 THz, which is an order of magnitude larger than traditional wavelength-tunable MEMS devices. Additionally, the device's size can be reduced by over an order of magnitude. Notably, this tuning range covers almost all color ranges, making it applicable to color displays. The structure indicates that this modulator can achieve full-color displays within a single pixel, with a color gamut range reaching 186% of the Adobe RGB color gamut. The device is small in size and will have important applications in fields such as frequency-tunable optical communication, laser radar, augmented reality technology, and wearable display devices.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 7","pages":"14566-14580"},"PeriodicalIF":3.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144038923","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

Analysis on optical coherence tomography images to detect irregularities and restoration on paper-based artwork. 光学相干断层扫描图像的不规则检测与复原。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.557994

Hendrik Nieuwboer, Camilla Baskcomb, Marco Bonesi, Matthew Goodwin, Abi Thampi, Frédérique Vanholsbeeck

引用次数: 0

Low complexity fiber nonlinearity compensation scheme fusing single-channel digital back propagation with dual phase-conjugate twin waves for DSCM-WDM system. DSCM-WDM系统中融合双相位共轭双波单通道数字反向传播的低复杂度光纤非线性补偿方案。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.557633

Wanxiang Bi, Chenglin Bai, Tianchi Chen, Hengying Xu, Lishan Yang, Yining Zhang, Yu Zhang, Pengfei Li, Shijie Hou

{"title":"Low complexity fiber nonlinearity compensation scheme fusing single-channel digital back propagation with dual phase-conjugate twin waves for DSCM-WDM system.","authors":"Wanxiang Bi, Chenglin Bai, Tianchi Chen, Hengying Xu, Lishan Yang, Yining Zhang, Yu Zhang, Pengfei Li, Shijie Hou","doi":"10.1364/OE.557633","DOIUrl":"https://doi.org/10.1364/OE.557633","url":null,"abstract":"In coherent systems combining digital subcarrier multiplexing (DSCM) and wavelength division multiplexing (WDM), signals are subject to self-subcarrier nonlinearity (SSN), cross-subcarrier nonlinearity (CSN), and cross-phase modulation (XPM) after optical fiber transmission. Most typical nonlinear compensation schemes for inter-channel and inter-subcarrier nonlinearities rely on information from neighboring channels and subcarriers, resulting in high complexity. To address the above problems, we propose a nonlinear low complexity compensation scheme that combines single-channel single-step digital back propagation (SC-DBP) with dual phase-conjugate twin waves (dual-PCTW), referred to as SC-DBP-DPCTW. This scheme efficiently compensates SSN while addressing XPM and CSN without relying on information from adjacent channels. Simulation results for a 9 × 128-GBaud transmission over a 1600-km DSCM-WDM system using dual-polarized 16QAM modulation show that SC-DBP-DPCTW achieves the same Q-factor improvement as 10-Step DSCM-DBP while reducing complexity by approximately 92.2%. Additionally, in a 3 × 28-GBaud transmission over an 806.4-km DSCM-WDM experimental system, the scheme provides the same Q-factor improvement as 5-Step DSCM-DBP with a complexity reduction of approximately 84.3%.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 7","pages":"15018-15031"},"PeriodicalIF":3.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143993136","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

Coherent beam combining of phased fiber laser array with pointing error correction using light intensity gradient trap. 利用光强梯度阱校正相控光纤激光阵列的相干光束组合。

IF 3.2 2区物理与天体物理

Optics express Pub Date : 2025-04-07 DOI: 10.1364/OE.558020

Likang Pan, Ran Yang, Jinjin Yu, Ziqiang Li, Jing Zuo, Liang Gu, Chao Geng, Xinyang Li

{"title":"Coherent beam combining of phased fiber laser array with pointing error correction using light intensity gradient trap.","authors":"Likang Pan, Ran Yang, Jinjin Yu, Ziqiang Li, Jing Zuo, Liang Gu, Chao Geng, Xinyang Li","doi":"10.1364/OE.558020","DOIUrl":"https://doi.org/10.1364/OE.558020","url":null,"abstract":"To solve the problem of coherent beam combining in multi-aperture arrays with large pointing errors, a control strategy based on the light intensity gradient trap is proposed. This method preprocesses the detected light intensity information from the target region before it enters the photodetector. The light intensity gradient trap filters the light intensity between the pointing errors of the spots in the extended area and the light intensity data. Through simulation, pointing error correction of six incoherent and coherent beams is successfully achieved using a stochastic parallel gradient descent algorithm. To further verify the feasibility of the method, a coherent beam combining system is constructed, with an adaptive fiber-optics collimator array used for the pointing error correction and a silicon-based optical chip used for piston aberration correction. Through piecewise control, a coherent beam combining of six beams containing pointing errors is achieved. The feasibility of pointing error correction based on the light intensity trap is verified theoretically and experimentally. This research is expected to provide new ideas and technical support for the development of the phased fiber laser array.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 7","pages":"16597-16609"},"PeriodicalIF":3.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143992239","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