Optics letters最新文献_第2页

Continuous-wave vacuum-ultraviolet generation at 192 nm by intracavity second-harmonic and sum-frequency generation. 用腔内二次谐波和和频产生192nm连续波真空紫外线。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.609603

Changsheng Zheng, Zihao Tong, Heng Ding, Ning Zhang, Lei Zhu, Yan Gao, Hong Liu, Qinggang Gao, Tianxiang Meng, Kui Wu, Yongguang Zhao, Zhengping Wang, Huaijin Zhang, Haohai Yu

{"title":"Continuous-wave vacuum-ultraviolet generation at 192 nm by intracavity second-harmonic and sum-frequency generation.","authors":"Changsheng Zheng, Zihao Tong, Heng Ding, Ning Zhang, Lei Zhu, Yan Gao, Hong Liu, Qinggang Gao, Tianxiang Meng, Kui Wu, Yongguang Zhao, Zhengping Wang, Huaijin Zhang, Haohai Yu","doi":"10.1364/OL.609603","DOIUrl":"https://doi.org/10.1364/OL.609603","url":null,"abstract":"Continuous-wave vacuum-ultraviolet (VUV) radiation near 190-200 nm is highly desirable for high-resolution photoemission spectroscopy, precision spectroscopy, and semiconductor metrology, yet compact all-solid-state sources in this spectral region remain challenging due to the limited nonlinear materials and complex cascaded conversion schemes. Here, we propose a straightforward approach for achieving a VUV laser in the continuous-wave regime with only two-step nonlinear conversion processes. As a proof-of-principle study, we choose a visible Pr:YLF laser platform: the 522-nm (3P1→3H5) laser is at first intracavity frequency-doubled to 261 nm and subsequently sum-frequency mixed with the 721 nm (3P0→3F4) transition in β-BaB2O4 (BBO), delivering milliwatt-level continuous-wave lasers at 192 nm. The proposed approach with two-step nonlinear-frequency up-conversions offers a markedly simplified path for compact, scalable continuous-wave VUV laser sources across the 190-200 nm spectral region.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 17","pages":"4821-4824"},"PeriodicalIF":3.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148875373","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

Broadband microwave time-frequency analysis via stabilized period-one oscillation and recirculating frequency shifting with a shared fiber loop. 宽带微波时频分析的稳定周期一振荡和共享光纤环路的循环频移。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.608721

Xianxin Zhang, Chi Jiang, Taixia Shi, Yang Chen

{"title":"Broadband microwave time-frequency analysis via stabilized period-one oscillation and recirculating frequency shifting with a shared fiber loop.","authors":"Xianxin Zhang, Chi Jiang, Taixia Shi, Yang Chen","doi":"10.1364/OL.608721","DOIUrl":"https://doi.org/10.1364/OL.608721","url":null,"abstract":"To address the need for time-frequency analysis (TFA) of broadband microwave signals-and to overcome the reliance of existing schemes on large-bandwidth swept microwave sources-we propose a broadband microwave signal TFA approach based on stabilized period-one (P1) oscillation and recirculating frequency shifting (RFS). By employing a feedback loop, a stable swept optical signal is generated from the stabilized P1 oscillation of a semiconductor laser, and its sweep bandwidth is further extended by an RFS loop to achieve multi-fold bandwidth expansion. To improve system compactness and help reduce relative delay drift, the feedback loop and the RFS loop share a common long fiber. The combined operation produces a broadband swept optical signal, which, through stimulated Brillouin scattering-based frequency-to-time mapping, enables TFA and frequency measurement of broadband microwave signals. Experimental results demonstrate an instantaneous analysis bandwidth of up to 57 GHz, a frequency resolution of 60 MHz, and a maximum mean absolute frequency measurement error of 38.16 MHz.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 17","pages":"4992-4995"},"PeriodicalIF":3.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148875375","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

Photothermal-induced Brillouin dynamics in CO₂-filled anti-resonant hollow-core fibers. co2填充抗谐振空心芯光纤中的光热诱导布里渊动力学。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.611393

Dahao Xu, Nuo Li, Caoyuan Wang, Wenzhe Xiao, Jie Zhu, Yu Qin, Yichun Shen, Limin Xiao

引用次数: 0

Noise-robust holographic data storage with implicit neural representation. 隐式神经表征的噪声鲁棒全息数据存储。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.607861

Yuan Li, Chong Zhang, Fei Wang, Yongkun Lin, Hongjie Liu, Xiaodi Tan, Guohai Situ

{"title":"Noise-robust holographic data storage with implicit neural representation.","authors":"Yuan Li, Chong Zhang, Fei Wang, Yongkun Lin, Hongjie Liu, Xiaodi Tan, Guohai Situ","doi":"10.1364/OL.607861","DOIUrl":"https://doi.org/10.1364/OL.607861","url":null,"abstract":"Holographic data storage (HDS) offers high capacity and throughput, making it a promising candidate for next-generation storage technologies. However, it is susceptible to increased bit error rate (BER) due to optical/electronic non-idealities and media inhomogeneity. To address this challenge, we propose an implicit neural representation (INR)-based data representation method with a dropout training strategy for robust HDS. In this framework, image information is encoded into compact network parameters, which are subsequently written to and read from the storage medium using an off-the-shelf HDS technique. The retrieved parameters are then loaded for inference to reconstruct the image. Compared with conventional pixel-wise image storage, the global representation enhances robustness by allowing the network to compensate for partial parameter errors. Moreover, it reduces the number of required data pages, providing compression benefits for sparse images. Both simulations and experiments demonstrate consistent gains under noisy conditions, with peak signal-to-noise ratio (PSNR) improved by over 50%, structural similarity index measure (SSIM) above 0.95, and a compression ratio of 2.92 for sparse images. These results demonstrate the effectiveness of the proposed approach for reliable HDS under high BER conditions.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 17","pages":"4840-4843"},"PeriodicalIF":3.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148875706","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

Phase-change structural colors based on dual Tamm plasmon polariton coupling in Sb₂S₃ multilayers. Sb2S3多层中基于双Tamm等离子激元耦合的相变结构色。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.612581

Tianle Yang, Mingyun Li, Yuheng Jin, Zhijian Chen, Yi Lu, Weifan Lai, Danyan Li, Nan Chen, Yikun Bu

引用次数: 0

Real-valued intensity transmission matrix based multimode fiber beamshaping for biophotonics applications. 基于实值强度传输矩阵的多模光纤光束整形在生物光子学中的应用。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.603130

Hui Ma, Rekha Gautam, Stefan Andersson-Engels, Sanathana Konugolu Venkata Sekar

{"title":"Real-valued intensity transmission matrix based multimode fiber beamshaping for biophotonics applications.","authors":"Hui Ma, Rekha Gautam, Stefan Andersson-Engels, Sanathana Konugolu Venkata Sekar","doi":"10.1364/OL.603130","DOIUrl":"https://doi.org/10.1364/OL.603130","url":null,"abstract":"We present a real-valued intensity transmission matrix (RVITM) framework that enables phase-free structured illumination control through multimode fibers, overcoming long-standing challenges of modal scrambling from dispersion and bending. Unlike previous TM-based approaches that require complex-field measurements or interferometric detection, our method relies solely on 16 × 16 Hadamard intensity inputs, enabling deterministic synthesis of circularly symmetric illumination patterns that remain stable under fiber bending. To the best of our knowledge, this is the first demonstration of RVITM-based ring illumination through a multimode fiber for Raman spectroscopy and the first proof-of-concept application to inverse spatially offset Raman spectroscopy (iSORS). Using a 3 mm-radius ring pattern for iSORS of a two-layer phantom, the subsurface-to-surface Raman peak ratio was enhanced by 1.5 compared with point illumination, confirming improved depth sensitivity without added system complexity. RVITM offers a calibration-friendly and mechanically robust route to fiber-delivered structured illumination, advancing minimally invasive spectroscopy and imaging applications.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 17","pages":"4976-4979"},"PeriodicalIF":3.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148875212","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

Broadband achromatic illusion via a transmission-reflection-integrated metasurface. 通过透射-反射-集成超表面的宽带消色差错觉。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.612882

Wenlong Li, Zhenxu Wang, Lu Song, Jiangang Liang, Dashuang Liao, Fang Liu, Wenye Ji, Tong Cai

引用次数: 0

Active feedback stabilization of a clock-transfer link for space-based gravitational-wave detection. 天基引力波探测时钟传输链路的主动反馈稳定。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.610763

Yijun Xia, Mingyang Xu, Yujie Tan, Chenggang Shao

{"title":"Active feedback stabilization of a clock-transfer link for space-based gravitational-wave detection.","authors":"Yijun Xia, Mingyang Xu, Yujie Tan, Chenggang Shao","doi":"10.1364/OL.610763","DOIUrl":"https://doi.org/10.1364/OL.610763","url":null,"abstract":"In space-based gravitational wave detection, ultra-stable oscillators are employed as the primary frequency reference; however, the detection sensitivity is fundamentally constrained by the inherent clock jitter of these oscillators. To mitigate such jitter-induced noise, a clock transfer link, consisting of a frequency distribution module and an electro-optic modulator, is required to be established. In this work, an active feedback control scheme is proposed for the suppression of noise within this transfer link. By extracting the GHz-order sidebands generated from the electro-optic modulator, an error signal is constructed that is then utilized to regulate the voltage-controlled oscillator, thereby enabling closed-loop noise suppression. Experimentally, a phase noise of 1×10-6rad/Hz1/2 at 1 mHz is achieved for the inner loop, which exceeds the detection requirement by more than one order of magnitude. For the outer loop, a phase noise of 1×10-5rad/Hz1/2 at 1 mHz is obtained, also meeting the mission specification. The proposed scheme is therefore demonstrated to offer a feasible technical solution for high-precision clock transfer in future space-based gravitational wave missions.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 17","pages":"4928-4931"},"PeriodicalIF":3.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148875290","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

Helium-enhanced spectral broadening in CO₂-filled hollow-core fiber. co2填充中空芯光纤中氦增强的光谱展宽。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.608371

Imre Seres, Barnabás Gilicze, Szabolcs Hack, Attila Czirják, Péter Jójárt, Tamás Bartyik, Zsolt Kovács, Zsolt Bengery, Rajaram Shrestha, Levente Ábrók, Ádám Börzsönyi, Katalin Varjú, Gábor Szabó, Zoltán Várallyay

引用次数: 0

Measurement of the coherence-OAM polarization matrix of a partially coherent vector light beam. 部分相干矢量光束相干- oam偏振矩阵的测量。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-09-01 DOI: 10.1364/OL.606821

Yonglei Liu, Hongxiang Wei, Daocheng Guo, Yahong Chen, Yangjian Cai, Haiyun Wang, Fei Wang

引用次数: 0