Optics express最新文献_第3页

Real-time demonstration of 8 × 125 Gbit/s point-to-multipoint photonics-assisted THz-over-fiber PON based on an optical wavelength routing scheme. 基于波长路由方案的8 × 125 Gbit/s点对多点光子辅助太赫兹光纤PON的实时演示。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.572509

Bingchang Hua, Min Zhu, Jiankang Li, Jiao Zhang, Zhifeng Xie, Junjie Ding, Mingzheng Lei, Yuancheng Cai, Xingyu Chen, Yucong Zou, Jianjun Yu

{"title":"Real-time demonstration of 8 × 125 Gbit/s point-to-multipoint photonics-assisted THz-over-fiber PON based on an optical wavelength routing scheme.","authors":"Bingchang Hua, Min Zhu, Jiankang Li, Jiao Zhang, Zhifeng Xie, Junjie Ding, Mingzheng Lei, Yuancheng Cai, Xingyu Chen, Yucong Zou, Jianjun Yu","doi":"10.1364/OE.572509","DOIUrl":"https://doi.org/10.1364/OE.572509","url":null,"abstract":"The rapid development of photonic-assisted terahertz wireless communication addresses surging data traffic demands in wireless systems. However, existing research predominantly focuses on point-to-point THz links, neglecting multi-user application scenarios in optical-wireless access networks. This paper proposes and experimentally demonstrates what we believe to be a novel point-to-multipoint photonic-assisted THz-over-fiber passive optical network (ToF-PON) architecture based on optical wavelength routing (OWR). By deploying an N × N arrayed waveguide grating (AWG) at the remote node (RN), we achieve precise routing of multi-user optical carriers and local oscillator (LO) to optical network units (ONUs). To simplify ONU design, LOs are centralized at the optical line terminal (OLT) and shared with user carriers through wavelength reuse, reducing system cost. In this architecture, we successfully transmit an 8-channel real-time DP-QPSK signal over 24 km of standard single-mode fiber (SSMF) and 100 m wirelessly. The system achieves a real-time net data rate of 800 Gbit/s at 300 GHz with 15% soft-decision forward error correction (SD-FEC) overhead at a pre-FEC BER of 1.56 × 10-2. To our knowledge, this represents the first experimental demonstration of real-time point-to-multipoint photonic-assisted THz wireless transmission exceeding 800 Gbit/s net rate in the THz band.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37462-37473"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125632","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

Fusion-driven visible light positioning using photodiode and event camera. 利用光电二极管和事件相机的融合驱动可见光定位。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.573814

Zhenghai Wang, Wei Wang, Xiaodong Liu, Lei Yu, Chen Chen, Xun Zhang

引用次数: 0

Development of a cost-effective dual-mode hyperspectral imaging system with machine learning for enhanced bacterial classification. 开发一种具有成本效益的双模高光谱成像系统与机器学习，以增强细菌分类。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.558509

Panuwat Pengphorm, Sukrit Thongrom, Sakkarin Lethongkam, Supayang Voravuthikunchai, Pawita Boonrat, Chanisa Kanjanasakul, Nawapong Unsuree, Chalongrat Daengngam

{"title":"Development of a cost-effective dual-mode hyperspectral imaging system with machine learning for enhanced bacterial classification.","authors":"Panuwat Pengphorm, Sukrit Thongrom, Sakkarin Lethongkam, Supayang Voravuthikunchai, Pawita Boonrat, Chanisa Kanjanasakul, Nawapong Unsuree, Chalongrat Daengngam","doi":"10.1364/OE.558509","DOIUrl":"https://doi.org/10.1364/OE.558509","url":null,"abstract":"This work presents the development of a cost-effective dual-mode hyperspectral imaging (HSI) system integrated with machine-learning models to detect and classify bacteria with enhanced accuracy. The HSI system was constructed using commercial off-the-shelf components and 3D-printed parts, with detailed optical simulations performed to aid in the design and validate the system's performance. A compound prism-grating-prism was implemented in an on-axis spectrograph configuration to simplify the optical assembly and minimize field-dependent aberrations. The system supports wide-field HSI in both reflectance and fluorescence modes, illuminated by chip-on-board LED sources with a visible-to-near-infrared spectrum and a narrow-band UV. The spectral resolution of the custom HSI system was determined to be 1.55 nm, with spatial resolutions of approximately 0.81 mm in the in-track direction and 0.49 mm in the cross-track direction. These resolutions are sufficient for effective spatio-spectral imaging of bacterial colonies. Furthermore, a model-training framework leveraging spectral feature fusion from both modes was developed to classify bacterial species, Staphylococcus aureus and Pseudomonas aeruginosa. The classification accuracies achieved using reflectance, fluorescence, and dual modes were 92.55%, 93.48%, and 97.11%, respectively. This dual-mode optical-computational platform not only demonstrates enhanced classification accuracy but also represents a scalable and economical solution for high-throughput bacterial identification.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37759-37783"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125573","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-band wide-angle beam steering thin film metasurface for satellite communication. 卫星通信用双频广角波束导向薄膜超表面。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.572058

Heming Xin, Zuojun Zhang, Xu Zhang, Jiangyu Wang, Jianming Liao, Ying She, Guo Bai, Jiawei He, Cheng Huang, Xiaoliang Ma, Xiangang Luo

引用次数: 0

Gas cell- and Fabry-Pérot interferometer-based self-calibration filtering system for a tunable laser to enhance the optical signal-to-noise ratio. 基于气细胞和法布里-帕氏干涉仪的可调谐激光自校准滤波系统，以提高光信噪比。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.570878

Yueyang Liu, Junkang Guo, Yuqi Yu, Zhigang Liu

引用次数: 0

Modulation in statistical properties of electromagnetic beam using surface plasmon polaritons. 利用表面等离子体激元调制电磁束的统计特性。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.559614

Nasim Akhtar, Preeti Sharma, Bhaskar Kanseri

引用次数: 0

Suppressed plasmonic mode coupling for efficient electro-optic lithium niobate modulator. 高效铌酸锂电光调制器的抑制等离子体模式耦合。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.561851

Yan Gao, Victor Torres-Company, Jochen Schröder

{"title":"Suppressed plasmonic mode coupling for efficient electro-optic lithium niobate modulator.","authors":"Yan Gao, Victor Torres-Company, Jochen Schröder","doi":"10.1364/OE.561851","DOIUrl":"https://doi.org/10.1364/OE.561851","url":null,"abstract":"Integrated lithium niobate electro-optic (EO) modulators have received strong attention due to the unique material properties of LN, which include low optical loss, high refractive index, and strong Pockels effect. The trade-off between electro-optic bandwidth (BW) and half-wave voltage (Vπ) in LN modulators has been widely studied; however, the trade-off between the voltage-length product (Vπ · L) and optical insertion loss (IL) has received less attention. Nevertheless, it is important for efficient EO modulators. The Vπ · L-IL trade-off originates from the balance between the applied electric field intensity and the absorption losses in metallic electrodes, which are both determined by the distance between electrodes and optical waveguides. Here, we find out tha the absorption loss is highly dependent on the electrode width as a result of the mode coupling between the dielectric waveguide and the metal-dielectric plasmonic modes. And we overcome this trade-off by using a special electrode shape that can suppress the mode coupling. As a result, we numerically demonstrate a 5-fold propagation loss reduction (at the same Vπ · L) and a 16% Vπ · L reduction (at the same loss) compared to a conventional electrode design. We also show that the proposed design does not degrade the frequency response of the modulator, and a more than 50 GHz 3-dB BW can be achieved with an electrode length of 0.8 cm. Our design principle could be used to achieve high-efficiency EO modulators with low insertion loss. Furthermore, the design principle could also be applied to other optical devices with metal-dielectric waveguide structure, such as EO or thermally tuned phase shifters, filters, and optical resonators, to improve their performance.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37784-37794"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125691","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

Applications of highly doped Ge_1-xBi_x alloy films in near-infrared photodetectors and photoresistor logic gates. 高掺杂Ge1-xBix合金薄膜在近红外探测器和光敏电阻逻辑门中的应用。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571962

Youbin Zheng, Dainan Zhang, Hengji He, Tianlong Wen, Yulong Liao, Qinghui Yang

{"title":"Applications of highly doped Ge1-xBix alloy films in near-infrared photodetectors and photoresistor logic gates.","authors":"Youbin Zheng, Dainan Zhang, Hengji He, Tianlong Wen, Yulong Liao, Qinghui Yang","doi":"10.1364/OE.571962","DOIUrl":"https://doi.org/10.1364/OE.571962","url":null,"abstract":"Ge1-xBix films have garnered significant attention due to their exceptional light absorption capabilities in the near-infrared spectrum, making them suitable for use in optoelectronic devices. Most Ge1-xBix films employed in near-infrared photodetectors exhibit lower levels of bismuth (Bi) doping (x <18%). This study explores the potential applications of highly doped Ge1-xBix films in near-infrared optoelectronic devices. The Ge0.819Bi0.181 and Ge0.748Bi0.252 films, with varying concentrations of Bi doping, were used to fabricate Au/Ge0.819Bi0.181 and Au/Ge0.748Bi0.252 optoelectronic devices. Test results indicate that the Au/Ge0.819Bi0.181 photodetector exhibits high responsivity and specific detection in the near-infrared range of 800-1200 nm. Without an applied bias, the responsivity and specific detection can reach 2.17 A/W and 1.05 × 1013 Jones at 1000 nm, respectively, demonstrating excellent self-driving performance. Since the Au film has established a complete Ohmic contact with the Ge0.748Bi0.252 film, the Au/Ge0.748Bi0.252 device can primarily function as a photoresistor in the near-infrared spectrum. Furthermore, considering its output current characteristics at bias voltages of 3V and 5V at 1000 nm, the device can also operate as a photoresistor logic OR gate. This study highlights the potential of highly doped Ge1-xBix films for applications in near-infrared photodetectors and photocontrolled logic gates.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38373-38381"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125722","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-efficiency SHG in etchless lithium niobate waveguides enabled by polymer-induced bound states in the continuum. 连续介质中聚合物诱导束缚态实现无蚀刻铌酸锂波导中的高效SHG。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571204

Shengrui Zhang, Shixin Wang, Dongliang Chen, Dingshan Gao, Jianji Dong, Xinliang Zhang

引用次数: 0

High-efficiency diamond fluorescence detection for magnetic sensing systems using a filter-free narrowband photodetector. 磁感应系统中使用无滤波器窄带光电探测器的高效金刚石荧光检测。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571937

Wei Gao, Shengkai Shen, Jinyu Tai, Huanfei Wen, Xin Li, Zhonghao Li, Zongmin Ma, Yunbo Shi, Hao Guo, Jun Tang, Jun Liu

{"title":"High-efficiency diamond fluorescence detection for magnetic sensing systems using a filter-free narrowband photodetector.","authors":"Wei Gao, Shengkai Shen, Jinyu Tai, Huanfei Wen, Xin Li, Zhonghao Li, Zongmin Ma, Yunbo Shi, Hao Guo, Jun Tang, Jun Liu","doi":"10.1364/OE.571937","DOIUrl":"https://doi.org/10.1364/OE.571937","url":null,"abstract":"The magnetic sensitivity of sensors based on diamond nitrogen-vacancy (NV) center solid-state spin systems depends on the detection of diamond fluorescence emission. The commonly used broadband photodetectors (e.g., 300-1000 nm) require filters to suppress 532 nm excitation light and background noise, which both attenuates fluorescence signal intensity and complicates system integration. To address these limitations, we designed an organic narrow-band photodetector employing a non-fullerene binary active layer (SBDTIC:DIBSQ), achieving targeted detection of diamond spin fluorescence wavelengths. The optimized device demonstrates a spectral absorption peak at 679 nm with a full width at half maximum (FWHM) of 130 nm. Integration of this detector into a diamond NV center magnetic sensing system yielded a magnetic sensitivity of 22.6 nT·Hz-1/2. These results validate replacing conventional broadband photodetector-filter combinations with our specialized device. This substitution offers dual advantages: enhanced performance and simplified integration for NV-based magnetometry.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38364-38372"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125739","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