Optics express最新文献

Polarization compensation for entanglement-based quantum key distribution. 基于纠缠态量子密钥分配的偏振补偿。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.573091

Shi-Hua Yin, Tian-Wang Luo, Wen-Juan Jiang, Xi-Yu Liu, Ya-Fei Yu, Zheng-Jun Wei, Tian-Ming Zhao, Jun-Bin Fang, Jin-Dong Wang

引用次数: 0

Optoelectronic synergistic terahertz fiber modulator for free-electron laser compatibility. 用于自由电子激光兼容的光电协同太赫兹光纤调制器。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.566927

Zhenyang Luo, Zilong Zhang, Longxiang Wei, Manyan Xie, Runhao Liu, Xingfu Wang, Depeng Kong, Yuan Yuan, Wenlong Li, Gangding Peng, Weijun Wang, Lijun Chen, Dai Wu, Peng Li, Kui Zhou, Tiefeng Yang, Huihui Lu, Yuming Wei, Heyuan Guan

{"title":"Optoelectronic synergistic terahertz fiber modulator for free-electron laser compatibility.","authors":"Zhenyang Luo, Zilong Zhang, Longxiang Wei, Manyan Xie, Runhao Liu, Xingfu Wang, Depeng Kong, Yuan Yuan, Wenlong Li, Gangding Peng, Weijun Wang, Lijun Chen, Dai Wu, Peng Li, Kui Zhou, Tiefeng Yang, Huihui Lu, Yuming Wei, Heyuan Guan","doi":"10.1364/OE.566927","DOIUrl":"https://doi.org/10.1364/OE.566927","url":null,"abstract":"Free-electron laser (FEL) operating in the terahertz (THz) spectral regime has found significant applications in diverse research fields. Nevertheless, fiber-based THz modulators based on FEL systems remain relatively underexplored. This study proposes a THz modulator based on side-polished fiber integrated with GaAs/Au nanoparticles (Nps) that demonstrates effective compatibility with the China Academy of Engineering Physics' THz FEL system. The modulator operates under high-power THz pulses (3 W) and achieves effective amplitude modulation across a broad frequency range from 1.6 to 3.0 THz. Owing to structural mode resonance, the modulator reaches the maximum modulation depth at 2.7 THz. The modulation depth was further enhanced by simultaneously applying optical and electrical modulation, i.e., optoelectronic synergistic optimization. Under a pump laser power of 235 mW, the peak modulation depth increases from 58.56% (at 0 V) to 67.11% (under 2.0 V). This investigation provides a solid foundation for the future application of fiber-based THz modulators in materials science, atomic physics, and biomedical studies, demonstrating their potential to advance the development of THz technology.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38054-38064"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125470","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

Dual-resonance single-beam triaxial spin-exchange relaxation-free magnetometer. 双共振单束三轴自旋交换无松弛磁强计。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.568707

Guiying Zhang, Wenyue Yu, Yisa Gao, Fan Wang, Qing Zhang, Qiang Lin

引用次数: 0

General vector auxiliary differential equation finite-difference time-domain method for rotationally symmetric vector wave propagation in nonlinear optics. 非线性光学中旋转对称矢量波传播的一般矢量辅助微分方程时域有限差分法。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571406

Caleb J Grimms, Robert D Nevels

引用次数: 0

Generalized modeling and turbulence resistance evaluation for higher-order Laguerre-Gaussian beam. 高阶拉盖尔-高斯光束的广义建模与湍流阻力评估。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.574261

Wenqi Ma, Xiuquan Li, Yi Qin, Canyi Deng, Guijun Hu

{"title":"Generalized modeling and turbulence resistance evaluation for higher-order Laguerre-Gaussian beam.","authors":"Wenqi Ma, Xiuquan Li, Yi Qin, Canyi Deng, Guijun Hu","doi":"10.1364/OE.574261","DOIUrl":"https://doi.org/10.1364/OE.574261","url":null,"abstract":"In current free-space optical (FSO) communication systems, the fundamental Gaussian beam is typically used as the signal carrier. However, its simple spatial structure makes it highly susceptible to atmospheric turbulence, significantly degrading system performance. This study addresses the issue by employing higher-order Laguerre-Gaussian (LG) beams as signal carriers. A universal transmission model based on the modified von Kármán turbulence spectrum is developed using confluent hypergeometric functions. The model reproduces Huygens-Fresnel diffraction integration within 0.9% power error and accelerates computation by more than tenfold. Combined simulations and a 40 Gbps QPSK FSO experiment show that higher-order LG beams exhibit reduced beam spreading, lower power loss, and mitigated scintillation compared to the fundamental Gaussian mode. For a target BER of 1 × 10-4, the LG01 mode beam reduces the transmitted power budget by 1-1.5 dB, while LG10 and LG02 beams reduce it by 2-4 dB compared to fundamental Gaussian beam. Incorporating the experimentally measured mixing efficiency penalty into the predictions leaves the mode ranking and performance trends unchanged, further validating the reliability and practical applicability of the proposed intensity model.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38941-38962"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125619","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

Remote sensing of flammable and toxic gases via IPDA lidar with InGaAs/InP single-photon detector over C + L band. C + L波段InGaAs/InP单光子探测器IPDA激光雷达对易燃有毒气体的遥感研究。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.572795

Haobin Han, Kexin Guo, Li Yi, Zhekai Li, Jiadong Hu, Saifen Yu, Zhen Zhang, Tengfei Wu, Jiawei Qiu, Haiyun Xia

{"title":"Remote sensing of flammable and toxic gases via IPDA lidar with InGaAs/InP single-photon detector over C + L band.","authors":"Haobin Han, Kexin Guo, Li Yi, Zhekai Li, Jiadong Hu, Saifen Yu, Zhen Zhang, Tengfei Wu, Jiawei Qiu, Haiyun Xia","doi":"10.1364/OE.572795","DOIUrl":"https://doi.org/10.1364/OE.572795","url":null,"abstract":"An integrated path differential absorption lidar (IPDA) for remote sensing of flammable and toxic gases is proposed, which is based on a broadband-tunable external-cavity diode laser (ECDL) and InGaAs/InP single-photon detector (SPD). An ECDL can maintain a narrow linewidth of 10 kHz throughout the continuous frequency scanning process in the C + L-band (1520-1620 nm), thus allowing a single laser to satisfy the detection requirements of multiple gases. To eliminate the influence of background light, a programmable frequency- and bandwidth-tunable grating filter is designed to synchronously tune with the output frequency of the ECDL. A homemade multi-channel coupled InGaAs/InP SPD maintains high detection efficiency in the C + L-band, ensuring the remote sensing detection capability of lidar. Four gases-CO, H13CN, C2H2, and NH3-with absorption lines spanning ∼45 nm in wavelength are selected to verify the multi-gas monitoring capability of the lidar. The intensity errors caused by erroneous photon counts and the non-linear frequency caused by the hysteresis effect of piezoelectric ceramic transducer are corrected to enhance the accuracy of absorbance spectra. The standard deviations of residuals between the experiment and single-peak fitting results for CO, H13CN, C2H2 are 0.22%, 0.54%, 0.39%, while the mean deviations are 0.19%, 0.44%, 0.29%, respectively. For the four-peak fitting of NH3, those values are 0.55% and 0.38%, respectively. Continuous 12-hour monitoring of the path-integrated concentrations of the four gases is conducted to verify the stability and accuracy of the system. The mean deviations and standard deviations of CO, H13CN, C2H2, and NH3 are 0.13%, 0.13%, 0.02%, 0.17%, and 1.07%, 1.68%, 1.21%, 0.67%, respectively.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38828-38840"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125643","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

Fiber optic surface plasmon resonance sensor for high-sensitivity detection of MMP10, a diagnostic target for Alzheimer's disease. 用于高灵敏度检测阿尔茨海默病诊断靶点MMP10的光纤表面等离子体共振传感器。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.573237

Yong Wei, Yuye Xuan, Chunlan Liu, Xiaoshan Li, Yonghui Zhang, Chenling Shi, Songquan Li, Qian Yang, Zhihai Liu

{"title":"Fiber optic surface plasmon resonance sensor for high-sensitivity detection of MMP10, a diagnostic target for Alzheimer's disease.","authors":"Yong Wei, Yuye Xuan, Chunlan Liu, Xiaoshan Li, Yonghui Zhang, Chenling Shi, Songquan Li, Qian Yang, Zhihai Liu","doi":"10.1364/OE.573237","DOIUrl":"https://doi.org/10.1364/OE.573237","url":null,"abstract":"The existing in vivo detection methods for Alzheimer's disease (AD) diagnostic targets have two problems of inability to detect in real time and poor recognition of ligand biocompatibility, making it difficult to effectively achieve early and rapid screening for AD. This article proposes a fiber optic surface plasmon resonance (SPR) sensor with a surface-modified quercetin ligand, which successfully detects what we believe to be a novel early AD diagnostic target matrix metalloproteinase-10 (MMP10) in artificial cerebrospinal fluid. It has the characteristics of real-time detection and good biocompatibility. By using molecular docking technology to simulate the molecular binding mechanism between quercetin and MMP10, it was confirmed that the binding free energy of the two was as high as -9.0 kcal/mol. A reflective SPR sensor functionalized with quercetin was constructed using a plastic-coated step-index multimode fiber, which was inserted into a medical needle to achieve concentration detection of MMP10 in a simulated cerebrospinal fluid environment in the subarachnoid space. Experimental data indicate that the detection sensitivity of the sensor is 7.06 nm/lg (pg/mL), with a detection limit of 1.41 pg/mL, which meets the clinical detection standards, and the recognition ligand is harmless to the human body. This is expected to be used for real-time detection of early AD diagnostic targets in vivo, providing new ideas for early and rapid screening of AD.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38181-38193"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125660","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

Spin decoupling-based broadband terahertz encoded metalens with multi-focal points. 基于自旋去耦的多焦点宽带太赫兹编码超透镜。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.573062

Hengli Feng, Hongyan Meng, Daqiang Cong, Jia Liu, Shuang Yang, Wenqiang Shi, Yachen Gao

{"title":"Spin decoupling-based broadband terahertz encoded metalens with multi-focal points.","authors":"Hengli Feng, Hongyan Meng, Daqiang Cong, Jia Liu, Shuang Yang, Wenqiang Shi, Yachen Gao","doi":"10.1364/OE.573062","DOIUrl":"https://doi.org/10.1364/OE.573062","url":null,"abstract":"Metasurfaces constructed using artificial sub-wavelength structure arrays have successfully acheived precise manipulation of electromagnetic wavefronts. Despite this, the precise control of electromagnetic waves with different spin-states remains a challenge. To address this, based on the new principle of spin-decoupling, we proposed two innovative metalenses with multiple focal points. Specifically, the first metalens can generate four foci with uniform intensity under 0.6 THz linearly polarized (LP) waves. When illuminated by left (LCP) or right circularly polarized (RCP) waves, it can form two foci that are symmetrically distributed about the center. For the second metalens, when LP waves are incident, it produces three weak foci and one strong focal point. When LCP waves are incident, the metalens generates only one strong focal point. When RCP waves are incident, they produce three weaker foci. The foci intensity and focal region for both types of metalens can be flexibly adjusted by modulating the ellipticity of the incident wave. In addition, they are capable of achieving spin-decoupled multi-focal points within a wide bandwidth range of 0.55 to 0.7 THz. This technology enables simultaneous control of orthogonal spin-state electromagnetic waves and precise regulation of spatial energy distribution, thereby offering new possibilities for the design and integration of multifunctional devices.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37474-37488"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125676","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

Tri-band shared aperture MIMO metantenna with broadband low scattering characteristics. 具有宽带低散射特性的三波段共享孔径MIMO准天线。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.574199

Yani Wang, Huiqing Zhai, Yuxin Jia, Huan Zhang, Borui Wu

{"title":"Tri-band shared aperture MIMO metantenna with broadband low scattering characteristics.","authors":"Yani Wang, Huiqing Zhai, Yuxin Jia, Huan Zhang, Borui Wu","doi":"10.1364/OE.574199","DOIUrl":"https://doi.org/10.1364/OE.574199","url":null,"abstract":"In this paper, a triple band shared aperture multiple input multiple output (MIMO) antenna is proposed, with each antenna capable of reducing radar cross section (RCS). The RCS reduction (RCSR) of 4-14 GHz is accomplished through a chessboard-distributed dual-layer polarization conversion metasurface (PCM). The PCM is fed directly by an L-shaped branch, forming a metantenna covering 5.3-6.9 GHz and is assembled into a 4×2 ±45° dual-polarized MIMO antenna, with isolation exceeding 20 dB without extra decoupling technology. A low-frequency and four mid-frequency antennas are loaded in the vacant area of the metantenna, forming a shared aperture MIMO antenna covering 2-3.36 GHz and 3.37-5.11 GHz, respectively. Frequency selective surfaces (FSSs) with band-pass characteristics are loaded on the arms of dipole to enable electromagnetic wave transmission of 5.3-6.9 GHz, minimizing its impact on the high-frequency antenna's radiation characteristics. The scattering characteristics of dipoles also allow for RCS reduction within 2-4 GHz. Besides, additional layers controlling RCS (ALCR) are loaded on the edges of the MIMO metantenna to further reduce RCS within 2-4 GHz. Ultimately, a radiation bandwidth of 110.1% covering 2-6.9 GHz is achieved, covering almost S and C bands, with a low-scattering bandwidth of 2-12.2 GHz covering S, C and X bands, achieving an RCSR of 9 dB within the frequency band.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38466-38482"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125685","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

Label-free detection of early-stage protein aggregation using a fiber-optic mechanical resonant probe. 利用光纤机械共振探针无标记检测早期蛋白质聚集。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571612

Yuliang Liu, Guifeng Li, Guoquan Wang, Zhonghao Li, Chaoyang Gong, Tao Zhu

{"title":"Label-free detection of early-stage protein aggregation using a fiber-optic mechanical resonant probe.","authors":"Yuliang Liu, Guifeng Li, Guoquan Wang, Zhonghao Li, Chaoyang Gong, Tao Zhu","doi":"10.1364/OE.571612","DOIUrl":"https://doi.org/10.1364/OE.571612","url":null,"abstract":"Early detection of protein aggregates offers valuable insights into the pathophysiology of a variety of neurodegenerative diseases. However, fluorescence methods, which serve as the \"golden standard\" for detecting protein aggregation, rely on fluorophores that bind to aggregated proteins, potentially interfering with the aggregation process. Here, we propose a fiber-optic mechanical resonant probe (FOMRP) for the label-free detection of early-stage protein aggregation by monitoring the mechanical properties of the protein solution. The FOMRP was fabricated by a tapered optical fiber and was driven by a piezoelectric actuator. The mechanical vibration of FOMRP was monitored with a fiber Bragg grating. We found that the FOMRP supports a series of nonlinear mechanical vibrations. We investigated the energy transfer mechanism between the fundamental and harmonic vibration modes. The 1/2 order subharmonic vibration was found to be highly sensitive to the external environment and was subsequently employed for viscosity measurement. The FOMRP was further applied to monitor early-stage protein aggregation, showing higher sensitivity than the conventional fluorescence method. This approach provides a promising tool for label-free protein aggregation monitoring and has potential applications in molecular and cellular mechano-assays.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38803-38813"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125703","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