Optics letters最新文献_第2页

Megawatt peak-power, single-mode, mid-infrared femtosecond pulse delivery at 5-6 μm via a silica-based anti-resonant hollow core fiber. 通过硅基抗谐振空芯光纤实现5-6 μm波长的中红外飞秒脉冲峰值功率兆瓦。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.555306

Ang Deng, Linzhen He, Yuxi Wang, Trivikramarao Gavara, Liangliang Lu, Wonkeun Chang, Hongyu Luo, Jianfeng Li, Houkun Liang

{"title":"Megawatt peak-power, single-mode, mid-infrared femtosecond pulse delivery at 5-6 μm via a silica-based anti-resonant hollow core fiber.","authors":"Ang Deng, Linzhen He, Yuxi Wang, Trivikramarao Gavara, Liangliang Lu, Wonkeun Chang, Hongyu Luo, Jianfeng Li, Houkun Liang","doi":"10.1364/OL.555306","DOIUrl":"https://doi.org/10.1364/OL.555306","url":null,"abstract":"We demonstrate the first, to our knowledge, delivery of megawatt peak power, single-mode mid-infrared (MIR) femtosecond pulses at 5-6 μm using a silica-based anti-resonant hollow core fiber (AR-HCF). Benefiting from the light confinement inside the hollow core, the AR-HCF exhibits high damage thresholds, reliable power stability, efficient spatial beam self-cleaning, and pulse shape preservation. Pumped by a homemade LGS-based two-stage optical parametric amplifier generating high-power ∼200 fs pulses, the fiber achieves a maximum delivered peak power of 4 MW at 5.1 μm and 5 MW at 6.1 μm, with peak intensities reaching 100 GW/cm2, despite fiber losses exceeding 2 dB/m. This flexible, meter-scale delivery system demonstrates exceptional potential for addressing the challenges of high peak power MIR laser delivery in precise, minimally invasive interventional ablation, particularly at resonant peaks such as amide-I (6.1 μm) and cholesterol esters (5.75 μm).","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 7","pages":"2149-2152"},"PeriodicalIF":3.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753960","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

Rolling-phase dynamic full-field OCT. 滚动相位动态全场OCT。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.543474

Tual Monfort, Kate Grieve, Olivier Thouvenin

引用次数: 0

Forward polarization sensing triggered area-focus DAS over a bidirectional coherent network. 在双向相干网络上，前向极化传感触发区域聚焦DAS。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.554903

Jingchuan Wang, Maoqi Liu, Junwei Zhang, Liwang Lu, Alan Pak Tao Lau, Chao Lu

{"title":"Forward polarization sensing triggered area-focus DAS over a bidirectional coherent network.","authors":"Jingchuan Wang, Maoqi Liu, Junwei Zhang, Liwang Lu, Alan Pak Tao Lau, Chao Lu","doi":"10.1364/OL.554903","DOIUrl":"https://doi.org/10.1364/OL.554903","url":null,"abstract":"Empowering optical communication networks with sensing capabilities is an emerging trend. In this Letter, we propose a method to preliminarily detect perturbations in a bidirectional coherent network by utilizing forward polarization information. This information acts as a trigger and provides prior knowledge to back-scattering-based distributed acoustic sensing (DAS), enabling more detailed event recovery. Consequently, the need to keep DAS continuously active is eliminated, making it highly practical for long-haul, high-resolution DAS sensing networks. Once activated, DAS can focus on a preliminary area of interest, significantly reducing its data processing workload. Experimentally, we employ a commercial 200-kHz laser to simultaneously achieve bidirectional 60-GBaud 16-QAM transmission and forward polarization sensing. The forward sensing information, extracted through equalization taps, triggers area-focused DAS, enabling fine-grained and ultra-low complexity sensing. This seamless integration of communication and sensing functions enhances efficiency and reduces complexity, paving the way for advanced network applications and more effective network surveillance capabilities.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 7","pages":"2227-2230"},"PeriodicalIF":3.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753782","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

High-sensitivity miniature fiber-optic temperature probe based on cholesteric liquid crystal laser emission. 基于胆甾型液晶激光发射的高灵敏度微型光纤温度探头。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.555545

Dong Zhou, Ziqi Zhou, Xu Li, Lishuang Yao, Wenzhu Cao, Yongjun Liu

引用次数: 0

520 nm laser-pumped watt-level femtosecond OPO with high stability of spectra and power based on the side-of-fringe locking technique. 基于条纹边锁定技术的520 nm激光泵浦瓦级飞秒OPO具有高光谱和功率稳定性。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.554484

Heng Jing, Shang Wang, Zhenhua Cong, Zhaojun Liu, Zhigang Zhao

{"title":"520 nm laser-pumped watt-level femtosecond OPO with high stability of spectra and power based on the side-of-fringe locking technique.","authors":"Heng Jing, Shang Wang, Zhenhua Cong, Zhaojun Liu, Zhigang Zhao","doi":"10.1364/OL.554484","DOIUrl":"https://doi.org/10.1364/OL.554484","url":null,"abstract":"A 520 nm laser-pumped 100 MHz LBO-based femtosecond optical parametric oscillator (fs-OPO) with high stability of spectra and power is presented, which is enabled by the side-of-fringe locking technique and whose signal wavelength can be tuned from 650 nm to 980 nm. The average powers are higher than 1 W within the nearly whole wavelength range (700-980 nm). Especially, the average power goes up to 1.8 W at 740 nm, with a conversion efficiency of 27.3%. To demonstrate the universality, three wavelengths of 740 nm, 800 nm, and 920 nm, which are called for by biophotonics, are advisedly chosen to verify the capability of the side-of-fringe locking technique for both spectral and power stabilizations. As a result, power fluctuations (in RMS) of 1.6%, 0.5%, and 1.6%, and central wavelength drifts (in SD) of 0.44 nm, 0.13 nm, and 0.19 nm, are obtained for those three wavelengths, respectively. In addition, pulse durations are measured to be 630 fs, 139 fs, and 182 fs. Those combined performances leave the possibility for long-time data acquirement in imaging experiments.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 7","pages":"2306-2309"},"PeriodicalIF":3.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753975","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

Absorbing molecules as optical clearing agents improve the resolution and sensitivity of photoacoustic microscopy. 吸收分子作为光学清除剂，提高了光声显微镜的分辨率和灵敏度。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.555723

Tianxiang Zuo, Chao Tao, Xiaojun Liu

{"title":"Absorbing molecules as optical clearing agents improve the resolution and sensitivity of photoacoustic microscopy.","authors":"Tianxiang Zuo, Chao Tao, Xiaojun Liu","doi":"10.1364/OL.555723","DOIUrl":"https://doi.org/10.1364/OL.555723","url":null,"abstract":"Photoacoustic microscopy (PAM) offers high resolution and 100% sensitivity to optical absorption, making it promising for biomedicine. However, strong light scattering in tissues limits its imaging depth, intensity, and resolution. Optical clearing agents (OCA) can reduce light scattering. However, traditional methods often use toxic substances or damage tissue components, restricting their application in living tissues. Recently, tartrazine, a common food pigment, has been shown to significantly improve tissue optical transparency while maintaining good biosafety. However, it is unclear whether tartrazine as an absorbing molecule is suitable for use in PAM. In this study, we show that tartrazine, despite its strong light absorption, can significantly enhance the performance of PAM, when used at an appropriate concentration. Our ex vivo experiments demonstrate tartrazine solution enables PAM to achieve an optical resolution of 21 μm even through the skin. A 0.6 M tartrazine solution improves resolution by 3.5 times and the imaging intensity by 4.5 times. Finally, in vivo brain imaging of a mouse with an intact scalp reveals that tartrazine not only increases the imaging intensity by about 4 times but also allows PAM to achieve an optical resolution of brain through the scalp and skull, revealing much more details of the microvasculature in the brain.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 7","pages":"2282-2285"},"PeriodicalIF":3.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753979","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 and wideband silicon optical channel-drop filter based on dual-strip waveguide antisymmetric Bragg gratings. 基于双带波导反对称布拉格光栅的紧凑宽带硅光通道下降滤波器。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.543797

Yong Zhao, Yuechun Shi, Yuxuan Chen, Shengping Liu, Pan Dai, Guilin Liu, Yi Ni, Xiangfei Chen

{"title":"Compact and wideband silicon optical channel-drop filter based on dual-strip waveguide antisymmetric Bragg gratings.","authors":"Yong Zhao, Yuechun Shi, Yuxuan Chen, Shengping Liu, Pan Dai, Guilin Liu, Yi Ni, Xiangfei Chen","doi":"10.1364/OL.543797","DOIUrl":"https://doi.org/10.1364/OL.543797","url":null,"abstract":"We propose and experimentally demonstrate a silicon channel-drop filter based on dual-strip waveguide anti-symmetric gratings, utilizing two Y-junctions to connect conventional multimode strip waveguides and dual-strip waveguides. Since the electric field distributions of the TE0 mode and TE1 mode are well overlapped in the grating corrugation region, the coupling coefficient of the proposed grating is much higher than that of conventional mode-conversion-based Bragg gratings. As a result, a wide bandwidth can be achieved with a short grating length. Experimental results on a silicon-on-insulator (SOI) platform show that the proposed filter can achieve a stopband width of 27.8 nm with a grating length of 60 μm and a stopband width of 44.5 nm with a grating length of 40 μm. Apodization can be realized by controlling the misalignment between different sub-gratings. The measured 3-dB bandwidth and sidelobe suppression ratio of the 60-μm cosine-apodized grating are 20.0 nm and 15.8 dB, respectively. Provided that the design is upgraded to handle both polarizations, we believe the proposed device can be a promising candidate as a filter for coarse wavelength division multiplexing (CWDM) systems, due to its wide bandwidth and compact size.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 7","pages":"2417-2420"},"PeriodicalIF":3.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754027","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

Optical edge detection with adjustable resolution using the planar liquid crystal Alvarez lens. 利用平面液晶阿尔瓦雷斯透镜的可调分辨率光学边缘检测。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.557550

Lin Liu, Qun Hao, Cancan Yao, Haoyue Xing, Yang Cheng

引用次数: 0

Resolution enhancement by subpixel sampling and computational reconstruction. 基于亚像素采样和计算重建的分辨率增强。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.557741

Jonathan Brewer, Milad Almasian, Alireza Saberigarakani, Xinyuan Zhang, Fenghua Shi, Yichen Ding

引用次数: 0

Robust ultrahigh Q guided mode resonances in rectangular lattices. 矩形晶格中鲁棒的超高Q导模共振。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-04-01 DOI: 10.1364/OL.557463

Shuqiao Xu, Guoyong Zhang, Haoshuang Zhong, Xiao Chen, Zicheng Yang, Hao Chen, Bo Chu, Peng Zhan, Shuming Wang, Zhuo Chen

{"title":"Robust ultrahigh Q guided mode resonances in rectangular lattices.","authors":"Shuqiao Xu, Guoyong Zhang, Haoshuang Zhong, Xiao Chen, Zicheng Yang, Hao Chen, Bo Chu, Peng Zhan, Shuming Wang, Zhuo Chen","doi":"10.1364/OL.557463","DOIUrl":"https://doi.org/10.1364/OL.557463","url":null,"abstract":"Mode-coupling is an important method for enhancing the quality (Q) factors of guided mode resonances (GMRs) in photonic crystal slabs. In square lattices, GMRs inherently exhibit orthogonality and degeneracy due to C4 symmetry, with different orders of GMRs typically displaying distinct frequencies at the Γ point. Here, we propose a versatile and highly effective approach to achieve ultrahigh Q GMRs in rectangular lattices by exploiting spatial degrees of freedom. Specifically, two distinct types of GMRs, supported by orthogonally oriented propagation directions, can robustly couple to form a hybridized GMR with an exceptionally ultrahigh Q value. Our theoretical analysis indicates that the formation of such hybridized GMRs requires merely the design of an appropriate period, based on the dispersion relations of the guided modes, obviating the need for complex structural modifications. This research offers a practical and innovative method for realizing ultrahigh Q GMRs in photonic crystal slabs, thereby providing more possibilities for light-matter interactions, nonlinear optics, and optoelectronic device applications.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 7","pages":"2402-2404"},"PeriodicalIF":3.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754049","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