Applied optics最新文献_第9页

Compact dual-band MIM plasmonic sensor with enhanced sensitivity for biochemical sensing. 紧凑型双波段MIM等离子体传感器与提高灵敏度的生化传感。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.570435

Ali M A Al-Husain, Ahmed Ghanim Wadday, Saif H Abdulwahid

引用次数: 0

Bright-pupil microsaccadic artificial eyes with optical gaze visualization. 光学注视可视化的亮瞳微眼球人工眼。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.569433

Tomohiro Sueishi, Michiaki Inoue, Soichiro Matsumura, Shoji Yachida, Masatoshi Ishikawa

引用次数: 0

Sensitive boron detection with surface-enhanced laser-induced breakdown spectroscopy assisted by a surface micro-structured copper foil. 表面微结构铜箔辅助下表面增强激光诱导击穿光谱的硼敏感检测。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.567063

Zenghui Wang, Yufeng Li, Yuqi Chen, Runhua Li

{"title":"Sensitive boron detection with surface-enhanced laser-induced breakdown spectroscopy assisted by a surface micro-structured copper foil.","authors":"Zenghui Wang, Yufeng Li, Yuqi Chen, Runhua Li","doi":"10.1364/AO.567063","DOIUrl":"https://doi.org/10.1364/AO.567063","url":null,"abstract":"In order to improve the analytical sensitivity of surface-enhanced laser-induced breakdown spectroscopy (SENLIBS) for the elemental analysis of liquid samples, a 20 µm cylindrical hole periodic micro-structure was efficiently fabricated on the surface of copper foil substrates using an integrated method of electroplating and imprinting. The periodic micro-structured surface decreases the reflectance of the incident laser and changes the interaction of the laser with the substrate. Thus, the spectral intensity of both substrates' elements and samples' elements can be effectively enhanced by SENLIBS analysis. Boron (B) in aqueous solution was quantitatively analyzed by SENLIBS using the copper foil substrate with a periodic micro-structured surface. The limit of detection (LoD) of boron reached 0.22 µg/mL under the current experimental conditions, and 3.1-fold improvement factors on the analytical sensitivity were achieved when compared with a flat copper foil substrate. For boron analysis, the quantitative results analyzed by SENLIBS are in good agreement with those analyzed by inductively coupled plasma optical emission spectroscopy (ICP-OES). An efficient method for fabricating periodic micro-structure on metal surfaces was demonstrated. This approach is expected to extend the applications of SENLIBS and improve its analytical performance for elemental analysis of liquid samples.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"64 25","pages":"7416-7422"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145115953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical fiber magnetic field sensing based on an optoelectronic oscillator with a prestressed and pre-magnetized enhanced-responsivity structure. 基于预应力预磁化增强响应结构的光电子振荡器的光纤磁场传感。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.569195

Pufeng Gao, Shiyi Cai, Donghui Li, Beilei Wu, Mingjian Zhu, Hui Chen, Desheng Chen, Muguang Wang

{"title":"Optical fiber magnetic field sensing based on an optoelectronic oscillator with a prestressed and pre-magnetized enhanced-responsivity structure.","authors":"Pufeng Gao, Shiyi Cai, Donghui Li, Beilei Wu, Mingjian Zhu, Hui Chen, Desheng Chen, Muguang Wang","doi":"10.1364/AO.569195","DOIUrl":"https://doi.org/10.1364/AO.569195","url":null,"abstract":"This paper presents a magnetic field responsivity-enhancement sensing system, which comprises a magnetic field enhanced-responsivity fiber Bragg grating (FBG) sensing unit and a microwave photonic demodulation system utilizing an optoelectronic oscillator (OEO). The enhanced-responsivity structure integrates a mechanical stress coupling mechanism and a magnetic field bias, applying both prestress and pre-magnetization to a giant magnetostrictive material to improve its magnetostrictive coefficient. The FBG is mechanically bonded to this structure, forming a highly responsive magnetic field sensing unit. The OEO-based demodulating system consists of a feedback oscillation loop incorporating a broadband light source, an optical modulator, a dispersion medium, and a photodetector. It converts the wavelength shift of the FBG induced by the magnetic field into a corresponding oscillation frequency shift of the OEO, enabling precise magnetic field measurement through frequency monitoring. Experimental results demonstrate that the magnetic field responsivity of the enhanced sensor reaches 3920 Hz/mT, which is 16.3 times higher than that of the unenhanced configuration. A magnetic field resolution of 0.255 µT and an accuracy of 51 µT are achieved. The proposed magnetic field sensing system significantly enhances responsivity without increasing the complexity of the demodulation architecture. This work provides a novel, to our knowledge, and practical approach for high-accuracy magnetic field measurement in engineering applications.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"64 25","pages":"7594-7601"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145116005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-precision edge-preserving stereo matching for cabinet panels using Markov random fields with guided image filtering. 基于马尔可夫随机场和引导图像滤波的机柜面板高精度保边立体匹配。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.564771

Xiang Xiong, Yibo Li, Liying Sun, Liu Qian

引用次数: 0

High-performance optical 3 bit Gray-code counter using T-flip-flop circuits with GaAlAs directional couplers. 使用带GaAlAs定向耦合器的t -触发器电路的高性能光学3位灰码计数器。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.563645

Ajay Yadav, Amit Prakash, Santosh Kumar, Ajay Kumar

{"title":"High-performance optical 3 bit Gray-code counter using T-flip-flop circuits with GaAlAs directional couplers.","authors":"Ajay Yadav, Amit Prakash, Santosh Kumar, Ajay Kumar","doi":"10.1364/AO.563645","DOIUrl":"https://doi.org/10.1364/AO.563645","url":null,"abstract":"This work presents the design and performance analysis of a high-performance optical 3 bit Gray-code counter that employs electro-optic modulation using GaAlAs directional couplers. The developed system comprises a mix of T-flip flops and directional couplers for optical logic operations and state transitions. The miniaturized layout design leverages the electro-optical concept to modulate signals with sufficient efficiency, resulting in an all-photonic synchronous counter. The functioning of the structure is fully explained using K-map-based Boolean logic synthesis to generate the required conditions for the flip flops used in the system. The suggested device configuration consists of GaAlAs material designed with a 3µm×3µm modulator. The coupling length (LC) of the device is set at LC=1cm. The EODC achieves optimal switching at a light wavelength of 900nm by inducing a refractive index shift (Δn) of approximately Δn≅1×10-4. The required electric field magnitude of approximately 3×104V/cm to perform optical switching is transformed into a voltage of 10 V placed across the electrodes of the EODC along the 3 µm channel. The counter operation is established using simulation results, including 3D MATLAB simulations and temporal simulations of counter state changes. This work presents a comprehensive analysis of the extinction ratio, contrast ratio, and amplitude modulation characteristics of the proposed optical 3 bit Gray-code converter circuit. These findings have gained wide appeal due to their low circuit complexity and faster circuit design compared to electrical circuits.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"64 25","pages":"7396-7406"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145115861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utility of spectral leakages to the depth profile using sub-bin in spectral-domain optical coherence tomography. 光谱域光学相干层析成像中子盒的光谱泄漏对深度剖面的应用。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.567846

Manabu Sato, Kouhei Kawada, Junpei Masuta, Tetsuo Kosaka

引用次数: 0

Global alignment of a segmented space telescope based on the stitched sensitivity matrix. 基于拼接灵敏度矩阵的分段空间望远镜全局对准。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.569616

Bangkun Zhu, Xiaoquan Bai, Chunyue Zhang, Shuaihui Wang, Fengyi Jiang, Yan Gao, Shuyan Xu, Guohao Ju

{"title":"Global alignment of a segmented space telescope based on the stitched sensitivity matrix.","authors":"Bangkun Zhu, Xiaoquan Bai, Chunyue Zhang, Shuaihui Wang, Fengyi Jiang, Yan Gao, Shuyan Xu, Guohao Ju","doi":"10.1364/AO.569616","DOIUrl":"https://doi.org/10.1364/AO.569616","url":null,"abstract":"As the demand for astronomical observations continues to grow, the aperture of telescopes is increasing, with segmented primary mirrors becoming a prevailing trend. However, segmented telescopes require a series of complex steps to ensure precise alignment between the individual segments, achieving diffraction-limited imaging performance. Among these steps, global alignment mainly focuses on placing the secondary mirror (SM) and primary mirror (PM) in the best possible positions, thus laying the foundation for subsequent alignments. This paper simulates the global alignment process using a stitched sensitivity matrix model for the segmented telescope to calculate the misalignments of optical elements. The specific formulation of the stitched sensitivity matrix model and the segment tilt misalignment calculation model has been explicitly derived in this paper. Furthermore, to the best of our knowledge, the sensitivity matrix is constructed based on the first nine fitted Zernike coefficients. Incorporating the piston and tip/tilt terms introduces additional constraints to the matrix, thereby improving the solution accuracy. During the alignment process, the segment tilt misalignment calculation model is employed to constrain the positions of the spots, ensuring their stability. These combined constraints collectively guarantee that the spot positions remain fixed throughout the global alignment, while enabling high-precision wavefront correction. The alignment process for global alignment is described in detail, and the correction results are analyzed under no error and measurement error conditions. Monte Carlo simulations indicate that the proposed method is effective in solving misalignments during global alignment. The research presented in this paper provides valuable insights for the development of large-aperture segmented telescopes.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"64 25","pages":"7504-7511"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145115883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crosstalk error compensation in multi-degree-of-freedom measurement systems utilizing the optical symmetry of a corner cube retroreflector. 利用角立方反射镜光学对称性的多自由度测量系统串扰误差补偿。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.567020

Chuang Sun, Changzhi Cui, Xin Zheng, Tianlin Zhou

引用次数: 0

Two-dimensional hybrid periodic micro/nanostructures fabricated by polarization holography of two femtosecond laser beams. 两束飞秒激光偏振全息制备二维杂化周期微纳结构。

Applied optics Pub Date : 2025-09-01 DOI: 10.1364/AO.569723

Rui Shen, Junjie Yang, Xin Jia, Pan Liang, Tian Xu, Yutian Liu, Qianyi Jiao, Zixiang Dai, Zhicheng Sui

引用次数: 0