Optics letters最新文献_第7页

Real-time frame-registered resonant fluorescence scanning laser ophthalmoscopy for quantifying static and dynamic cellular properties in the mouse retina: publisher's note.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.560030

Tianqi Song, Yao Wang, Yuxiang Zhou, Mingliang Zhou, Yanhong Ma, Donghan Ma, Jia Qu, Jinyi Zhang, Pengfei Zhang

引用次数: 0

Resolution-enhanced multifocal structured illumination microscopy using fluorescence fluctuations and Fourier ptychography scheme.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.555763

Bin Yu, Mengjiao Nie, Zizhen Jiang, Danying Lin, Junle Qu, Huiqun Cao

{"title":"Resolution-enhanced multifocal structured illumination microscopy using fluorescence fluctuations and Fourier ptychography scheme.","authors":"Bin Yu, Mengjiao Nie, Zizhen Jiang, Danying Lin, Junle Qu, Huiqun Cao","doi":"10.1364/OL.555763","DOIUrl":"https://doi.org/10.1364/OL.555763","url":null,"abstract":"Multifocal structured illumination microscopy (MSIM) provides a twofold resolution enhancement over the optical diffraction limit at depths of up to 50 μm in samples. This is achieved through sparse multifocal excitation patterns and digital image post-processing, making MSIM a highly advantageous technique for the three-dimensional super-resolution (SR) imaging of thick specimens. However, the spatial resolution of MSIM is inherently constrained by its underlying imaging principles. This paper presents what we believe to be a novel method that integrates SR optical fluctuation imaging based on Fourier ptychography and deconvolution (SFPD) with MSIM, termed SFPD-MSIM. Using photoblinking InP/ZnSe/ZnS core-shell quantum dot fluorescent probes for sample labeling, we demonstrate that, compared to wide-field imaging microscopy, SFPD-MSIM achieves fourfold resolution improvement. Additionally, it substantially reduces the image-acquisition time while preserving the structural integrity of the original samples. This advancement marks a major step forward in MSIM technology, providing a powerful tool for detailed structural analysis of complex and thick biological specimens.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 6","pages":"2005-2008"},"PeriodicalIF":3.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143630736","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

Smartphone-based bimodal device (SBBD) for oral precancer diagnosis and biopsy guidance in clinical settings.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.555254

Nemichand, Shivam Shukla, Bhaswati Singha Deo, Amar Nath Sah, Subrata Mishra, Rachna Rath, Asima Pradhan

{"title":"Smartphone-based bimodal device (SBBD) for oral precancer diagnosis and biopsy guidance in clinical settings.","authors":"Nemichand, Shivam Shukla, Bhaswati Singha Deo, Amar Nath Sah, Subrata Mishra, Rachna Rath, Asima Pradhan","doi":"10.1364/OL.555254","DOIUrl":"https://doi.org/10.1364/OL.555254","url":null,"abstract":"We present a smartphone-based bimodal device (SBBD) combining fluorescence imaging and spectroscopy for a noninvasive, portable, cost-effective, and real-time diagnosis of oral precancer. The device employs a 405 nm laser excitation to capture native fluorescence from intrinsic biomarkers, including flavin adenine dinucleotide (FAD) and porphyrin, across 136 subjects representing normal, OPMD, and OSCC. The fluorescence imaging module identifies regions of interest (ROI) based on the red-to-green band ratio (porphyrinFAD), while the spectroscopy module confirms findings through multiple point measurements. A 2D convolutional neural network (CNN) classifies normal tissues, oral potentially malignant disorders (OPMD), and oral squamous cell carcinoma (OSCC) with 97.04% accuracy, 96.13% sensitivity, and 97.73% specificity. Fluorescence spectroscopy, enhanced by an artificial neural network (ANN), achieves 97.44% accuracy, 95.24% sensitivity, and 97.44% specificity. This bimodal approach effectively addresses the diagnostic gap that occurs when either spectroscopy or imaging is used independently for oral cancer detection and biopsy guidance.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 6","pages":"1993-1996"},"PeriodicalIF":3.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143630778","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

Light tunneling and anomalous reflection from the diffraction of complex annuli: modeling the forward light scattering by spherical particles.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.557822

Lilian Chabrol, Fabrice R A Onofri

引用次数: 0

Wavelength-tunable and high-heralding-efficiency quantum photon source in a birefringent phase-matched lithium niobate waveguide. 双折射相位匹配铌酸锂波导中的波长可调和高辐射效率量子光子源。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.547100

Qi-Tao Zhu, Xiao-Xu Fang, He Lu

引用次数: 0

Unidirectional perfect absorber based on a one-dimensional topological photonic crystal heterostructure of Weyl semimetals.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.557207

Shuai Deng, Huihui Zhong, Chengping Yin, Kunyuan Xu

引用次数: 0

All-optical diode based on asymmetric nonlinear optical absorption in ternary transition metal chalcogenides. 基于三元过渡金属钙钛矿中非对称非线性光学吸收的全光二极管。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.553268

Lei Yan, Dechao Shen, Qinyong He, Anping Ge, Guohong Ma, Ye Dai, Liaoxin Sun, Saifeng Zhang

{"title":"All-optical diode based on asymmetric nonlinear optical absorption in ternary transition metal chalcogenides.","authors":"Lei Yan, Dechao Shen, Qinyong He, Anping Ge, Guohong Ma, Ye Dai, Liaoxin Sun, Saifeng Zhang","doi":"10.1364/OL.553268","DOIUrl":"https://doi.org/10.1364/OL.553268","url":null,"abstract":"As the typical representative of ternary transition metal chalcogenides, CrPS4 and MnPS3 exhibit unique light-matter interactions, demonstrating great potential in photonic devices. In this work, we systematically studied the nonlinear optical (NLO) responses of CrPS4 and MnPS3 flakes by the I-scan technique. CrPS4 and MnPS3 flakes show saturable absorption and reverse saturation absorption excited by fs laser at wavelengths of 600 nm, respectively. Furthermore, utilizing the non-degenerate transient absorption technology, we observed that the fast and slow carrier relaxation times of CrPS4 at different probe wavelengths were components with constants of about 1.4-3 ps and 490-1420 ps, respectively. Their excellent ultrafast NLO properties imply that they can be applied in photoelectronic fields for advanced and functional devices. Here, we designed and demonstrated an all-optical diode based on a CrPS4/MnPS3 tandem structure by breaking the time-reversal symmetry, and it achieved nonreciprocal transmission of light similar to that of a p-n electron diode.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 6","pages":"2109-2112"},"PeriodicalIF":3.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143630657","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

Compact underwater single-photon imaging lidar. 紧凑型水下单光子成像激光雷达。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.557195

Mingjia Shangguan, Ye Li, Yican Mo, Jun Wang, Tao Huang

{"title":"Compact underwater single-photon imaging lidar.","authors":"Mingjia Shangguan, Ye Li, Yican Mo, Jun Wang, Tao Huang","doi":"10.1364/OL.557195","DOIUrl":"https://doi.org/10.1364/OL.557195","url":null,"abstract":"Underwater target imaging is important for marine resource exploration, underwater navigation, and related fields. Lidar, with its high angular resolution, excellent depth resolution, and long-distance 3D imaging capabilities, has become an essential tool for target imaging. However, the strong absorption and scattering properties of water, along with the constraints of lidar power consumption and system size, present significant challenges for high-performance lidar systems that are deployable in underwater and even deep-sea environments. To address these challenges, this work proposes and demonstrates a compact, all-fiber underwater imaging lidar. This lidar incorporates highly sensitive single-photon detection technology and features a cylindrical design with a diameter of 0.18 m and a length of 0.68 m. To achieve miniaturization, time-division multiplexing based on fiber arrays is employed, enabling the imaging of small underwater targets using two single-pixel detectors and a two-channel acquisition card. Additionally, an algorithm is introduced to effectively extract and subtract scattering signals from suspended particles in the water column. Tank experiments confirm that the system achieves imaging distances exceeding 10 times the optical attenuation length, and its distance and lateral resolutions are validated using step and stripe targets. With its outstanding performance and broad application potential, this compact lidar system is poised to complement imaging sonar and play a key role in underwater target monitoring and search operations.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 6","pages":"1957-1960"},"PeriodicalIF":3.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143630666","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

Wavelength-tunable blue light generation based on frequency tripling of a random Raman fiber laser.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.553695

Wei Deng, Lu Chen, Zunwang Bo, Mengqiu Fan, Zhitao Leng, Houkun Liang, Bo Hu, Han Wu

{"title":"Wavelength-tunable blue light generation based on frequency tripling of a random Raman fiber laser.","authors":"Wei Deng, Lu Chen, Zunwang Bo, Mengqiu Fan, Zhitao Leng, Houkun Liang, Bo Hu, Han Wu","doi":"10.1364/OL.553695","DOIUrl":"https://doi.org/10.1364/OL.553695","url":null,"abstract":"Nonlinear frequency upconversion of random fiber lasers can generate wavelength flexible visible light with low temporal coherence. In this work, we demonstrate wavelength-tunable blue light generation based on frequency tripling of a random Raman fiber laser (RRFL) in two cascaded periodically poled lithium niobate (PPLN) crystals. The RRFL can deliver watt-level and narrowband lasing in the spectral range of 1412-1435.5 nm, and by using a combination of a second-harmonic generation (SHG) and a sum-frequency generation (SFG) in two cascaded PPLN crystals, blue light with a spectral tuning range from 470.6 to 478.7 nm is experimentally achieved, which is the first demonstration, to the best of our knowledge, of visible light below 500 nm from the frequency conversion of random fiber lasers. Moreover, we confirmed that the temporal intensity fluctuations of the generated blue light are uncorrelated, making such a blue light source suitable for chaotic lidar and temporal ghost imaging applications. We believe the proposed frequency tripling of high-power and tunable RRFL can provide a new platform for generating wavelength flexible and temporal chaotic blue light, which can have promising applications in underwater lidar, display, and sensing applications.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 6","pages":"2045-2048"},"PeriodicalIF":3.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143630855","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

Wideband chaos generation based on an integrated mutual coupling laser.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-03-15 DOI: 10.1364/OL.558091

Yuanyuan Guo, Yuanye Zhang, Hua Gao, Longsheng Wang, Pengfa Chang, Hong Han, Zhiwei Jia, Anbang Wang, Yuncai Wang

引用次数: 0