IEEE Photonics Journal最新文献

{"title":"Fast Adaptive Meta-Learning Framework for Resource Allocation in Optical Networks","authors":"Xiaodong Liu;Shan Yin;Mengru Cai;Xueyu Fan;Shuyao Wang;Shanguo Huang","doi":"10.1109/JPHOT.2026.3690755","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3690755","url":null,"abstract":"With new applications arising in 6G, digital twins and generative artificial intelligence, optical networks are facing challenges from diverse and constantly changing environments. However, existing global optimization schemes for resource allocation such as meta heuristics and machine learning based methods are designed for specific environments, and thus struggle to maintain knowledge when encountering different environments. Consequently, new resource allocation scheme that can fast adapt across various environments (resource types, requests, and network topologies) becomes crucial. In this paper, we propose a fast adaptive meta-learning framework for resource allocation (FAML) to achieve high resource efficiency and fast adaption across environments. FAML is a systematic solution that reformulates the resource allocation problem by explicitly considering environment changing, and leverages the meta-learning approach to learn the meta policy that can adapt across environments. Besides, FAML adopts graph attention networks (GAT) to represent information of various networks, and deep reinforcement learning (DRL) to learn an optimized policy. We conduct simulations under various environmental distributions for evaluation, showing that FAML performs significantly better than previous methods with respect to both optimization performance and adaptation efficiency. In particular, FAML has 80%/57% reduction on average in training episodes compared to the DRL/TL, respectively.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 3","pages":"8600113-8600113"},"PeriodicalIF":2.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11508147","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148171460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatiotemporal Modulation of Terahertz Intelligent Reflecting Surfaces for Mixed-Mode OAM Beamforming and Dual-Spot Near-Field Focusing","authors":"Jimil Bhatt;Sreekavya M K;Basudev Majumder;Basudeb Ghosh","doi":"10.1109/JPHOT.2026.3693293","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3693293","url":null,"abstract":"Terahertz (THz) metasurfaces occupy a unique spectral niche between microwave and optical regimes, enabling a sophisticated balance of sub-millimeter electromagnetic control and non-ionizing interaction. While the high-frequency nature of the THz band inherently supports high-precision sensing, a significant knowledge gap persists due to the reliance of many current systems on static optics and inflexible wavefront control. The proposed work addresses this limitation by presenting a simulation-driven framework for a single-layer, spatiotemporal-coded THz intelligent reflecting surface (IRS) operating at 0.7 THz. The technical novelty of this work lies in the integration of a time-division multiplexing (TDM) strategy that enables the synthesis of dual orbital angular momentum (OAM) beams within each modulation period, complemented by a depth-dependent sensing model for volumetric field localization. By leveraging a dual-domain modeling approach, we demonstrate the successful generation of far-field mixed mode OAM patterns with topological charges <inline-formula><tex-math>$l = pm 3$</tex-math></inline-formula> directed toward <inline-formula><tex-math>$theta = pm 30^circ$</tex-math></inline-formula> with far field gain exceeding 17 dBi. Crucially, the far-field patterns act as a direct validation of the spatiotemporal logic, as the stability of the OAM modes at the predicted harmonic frequencies confirms that the electronic timing is functioning exactly as programmed. This framework emphasizes the advancement of programmable THz apertures for secure joint communication and sensing.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 3","pages":"7700314-7700314"},"PeriodicalIF":2.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11520240","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148171464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Frequency-Multiplexed Barker-Coded Φ-OTDR for High-Speed Distributed Acoustic Sensing","authors":"Wanxin Li;Zhiyang Xue;Zheyuan Lin;Dongdong Zou;Huan Huang;Shanshan Cao;Yi Cai","doi":"10.1109/JPHOT.2026.3688039","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3688039","url":null,"abstract":"Pulse pre-coding Φ-OTDR has been widely employed to enhance the signal-to-noise ratio (SNR) of recovery perturbation while with the compromising of interrogation frequency. In this paper, a novel frequency-multiplexed Barker-coded Φ-OTDR is proposed to improve interrogation speed and phase-demodulation fidelity with reduced system complexity. In this scheme, dual acousto-optic modulators (AOM) with distinct radio-frequency shifts driven by unipolar Barker sequences are utilized to achieve parallel interrogation, enabling with heterodyne coherent detection and eliminating the need for IQ modulation. Compared with conventional Golay complementary coding, the proposed scheme achieves a fourfold increase in interrogation repetition rate at the same clock frequency. Broadband linear-chirp simulations from 10 Hz to 5 kHz confirm an extended usable dynamic frequency range, with the Barker-coded response exhibiting improved phase fidelity and producing sharper, more uniform short-time Fourier transform (STFT) ridges than the Golay-coded benchmark. The decoding performance is subsequently evaluated using the phase-recovery SNR as the primary metric. For a 1 kHz sinusoidal phase perturbation with a peak excursion of approximately 1 rad over a 2 km fiber, averaging over repeated simulation runs yields an SNR enhancement of about 4.1 dB relative to the Golay-coded case. Moreover, a parametric study over different Barker code lengths shows that increasing the code length improves phase stability and results in a larger recovered phase excursion at the perturbation location, confirming the role of correlation gain in enhancing phase-recovery fidelity. In a 10 km fiber scenario, repeated simulation results further indicate an approximately 4 dB SNR improvement of the Barker-coded scheme over single-pulse interrogation for a 1 kHz sinusoidal phase perturbation. The proposed approach is fully compatible with existing fading-suppression and noise-reduction techniques, making it well suited for high-speed and large-scale Φ-OTDR applications.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 3","pages":"0600707-0600707"},"PeriodicalIF":2.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11495302","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148506745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spectrum-Efficient Coherent Photonic Terahertz Transmission System Based on Subcarrier Multiplexing With Offset Quadrature Amplitude Modulation","authors":"Zhuoxin Li;Jiao Zhang;Yutong Jiang;Siyu Zhu;Meng Liu;Jiaxuan Li;Ruizhe Xu;Xiaodong Wei;Shuang Gao;Junkai Mao;Min Zhu","doi":"10.1109/JPHOT.2026.3689723","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3689723","url":null,"abstract":"To overcome the spectral efficiency (SE) limitations of conventional subcarrier multiplexing (SCM) caused by guard bands, a spectrum-efficient coherent photonic terahertz (THz) transmission system based on SCM with offset quadrature amplitude modulation (SCM-OQAM) is proposed and validated. By modeling intrinsic interference in spectrally compact configurations, we reveal that adjacent-channel interference exhibits an alternating real-imaginary structure. Leveraging this property, the proposed SCM-OQAM scheme achieves interference suppression in the real domain without requiring guard bandwidth. A coherent transmission architecture together with the corresponding digital signal processing (DSP) workflow is developed. Simulation results demonstrate that, under comparable performance conditions, the proposed system achieves approximately 15% improvement in SE compared with SCM-QAM. In addition, owing to the high tolerance of OQAM to truncation effects, the critical truncation length can be reduced from 7 T to 3 T, leading to a 57% reduction in the number of filter taps and a corresponding reduction in computational complexity. Furthermore, the proposed scheme is particularly well suited to short-reach photonic THz access and fronthaul scenarios, where spectrum resources are scarce and implementation efficiency is critical. These results highlight the potential of SCM-OQAM as an effective approach for jointly improving spectral utilization and DSP efficiency in future high-capacity THz communication systems.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 3","pages":"5900211-5900211"},"PeriodicalIF":2.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11503658","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148513541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wavelength Wiggling Solitons in Response to Fast Intra-Cavity Polarization Perturbation","authors":"Xuecheng Wu;Haoyun Zhang;Qianchao Wu;Dongyuan Li;Fengqiu Wang","doi":"10.1109/JPHOT.2026.3692593","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3692593","url":null,"abstract":"Mode-locked fiber lasers serve as an important platform for investigating soliton dynamics. Techniques such as time-stretched dispersive Fourier transform (TS-DFT) have enabled the real-time observation of rich transient behaviors, typically as a function of parameters like dispersion and pump power. However, the effect of a fast intra-cavity polarization perturbation on a stable single soliton has not been systematically investigated. By applying such a perturbation via a photoelastic modulator (PEM), we reveal through TS-DFT measurements that the original, unperturbed soliton may transition into a “wiggling” regime, where its central wavelength oscillates synchronously with the polarization modulation. This sustained response, accompanied by enhanced dispersive wave emission, constitutes a new and unobserved form of dynamic soliton equilibrium. The novel wiggling behavior, if observed by conventional time-averaging optical spectrometer, would have misleadingly appeared as a spectral broadening effect. Further, when the polarization perturbation exceeds a certain threshold, the soliton is seen to destabilize. Our work provides the first experimental evidence on how a soliton would adapt or respond to a fast intra-cavity polarization perturbation, and it helps advance understanding of how stable solutions of nonlinear Schrödinger equation evolve under time-varying polarization drives.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 3","pages":"1501807-1501807"},"PeriodicalIF":2.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11516171","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148510085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photonic Crystal Fiber-Based Optofluidic Platforms for Biomedical Diagnostics: A Comprehensive Review","authors":"Yugesh Kumar P;Sangeetha N;Subramaniyan Parimalam S","doi":"10.1109/JPHOT.2026.3686400","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3686400","url":null,"abstract":"Photonic crystal fiber (PCF)-based optofluidic (OF) technologies have been developed as miniature and highly sensitive systems. PCFs are superior to conventional optical sensors as a result of light-fluid interaction. PCF allows regulated fluid penetration inside the microstructured cladding zones. This study covers various PCF-based OF sensing approaches, including hollow-core, solid-core, side-polished, D-shaped, and selectively infiltrated designs. It focuses on the design principles of refractive index modulation, modal confinement, and birefringence management. We analyzed fundamental detection methods, such as refractive index sensing and plasmonic sensing. This study also examines critical performance parameters, such as wavelength sensitivity, confinement loss, resolution, and limit of detection. Existing solutions for single-cell analysis, protein detection, and disease diagnostics were used to identify design trade-offs and optimization strategies. The integration of MEMS-integrated microfluidics, sophisticated plasmonic materials, and machine learning-based signal processing is expanded to highlight the growing system-level capabilities. Major issues related to fabrication repeatability, fluid stability, and flexibility were examined. Finally, future research options for stable, multichannel, and therapeutically translatable lab-on-a-fiber platforms are discussed.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 3","pages":"0600628-0600628"},"PeriodicalIF":2.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11491846","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148510965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Talbot Effect of Non-Coaxial Bessel Beams","authors":"Yizheng Yao;Siqin Yan;Xuhui Sun;Chenglong Wang;Zhenyu Zhao;Xiao Lei;Jiaxin Fu;Chao Zhang;Yiqiang Qin","doi":"10.1109/JPHOT.2026.3692128","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3692128","url":null,"abstract":"In recent years, the superposition of nondiffracting beams has been employed to construct Talbot effects with novel propagation properties. Here we discover that non-coaxial Bessel beams can also be used to construct the Talbot effect, which is a more general case that encompasses the coaxial one. The realization of the Talbot effect is determined only by the longitudinal wave vectors (the components of wave vectors in the propagating direction), other parameters like the amplitude coefficients, mode orders and the spatial arrangement of these Bessel beams can be chosen arbitrarily, providing more degrees of freedom for light field construction. We also find that rotating self-imaging effect may occur at fractional Talbot distances under certain circumstances. The results are further verified by numerical simulations with multi-parameter control. These results considerably expand the scope of traditional Talbot imaging theory.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 3","pages":"6500207-6500207"},"PeriodicalIF":2.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11514953","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148512622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photonic-Assisted Microwave Channelization With Coherent Dual-Optical Comb Generation and Image-Reject Down-Conversion","authors":"Yuanfen Zhou;Yunxin Wang;Jing Zhang;Dayong Wang;Yu Zhang","doi":"10.1109/JPHOT.2026.3675296","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3675296","url":null,"abstract":"Microwave photonics (MWP) channelizer converts the radio frequency (RF) signal to optical domain for transmission and processing, avoiding the bottleneck of electronic signal and realizing the instantaneous reception of large bandwidth signal. A dual-output image suppression microwave photonic channelizer has been used. In this scheme, coherent signal optical frequency combs (OFC) and local optical frequency combs are generated by recirculating frequency shifter (RFS), and sub-channel signals are obtained by using the natural frequency difference between the signal OFC and local oscillator OFC, which avoids accurate alignment of center frequency. Meanwhile, the image rejection mixer suppresses the image signal to realize the double output. Finally, a linear frequency modulation signal (LFM) with a bandwidth of 8–14 GHz is divided into 12 sub-channels with a bandwidth of 500 MHz, and the image rejection ratio (IRR) of each sub-channel is larger than 20 dB. The spurious-free dynamic range (SFDR) of the channelizer is 90.2 <inline-formula><tex-math>${rm dB} cdot {rm Hz}^{2/3}$</tex-math></inline-formula>. The OFC generated by this scheme has the advantages of adjustable spacing, high flatness and large comb lines, which can improve the actual receiving bandwidth of the system. It has a wide application prospect in the field of radar, electronic warfare and broadband communication.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 2","pages":"1-9"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11442286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148509139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From Recording to Intervention: Causal Lineage Tracing With Primed Conversion","authors":"Julian Boecker;Periklis Pantazis","doi":"10.1109/JPHOT.2026.3661821","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3661821","url":null,"abstract":"Predicting cell fate requires reconstructing a cell's integrated history: its lineage, the signals it received, how its internal state evolved and its spatial context. Existing recording methods write this information into DNA and read it only at the experiment's end, allowing reconstruction of what happened but not testing whether it was required. Closing this gap demands real-time observation with the capacity to intervene: perturbing specific cells based on what is observed, while sparing others as matched controls. Primed conversion, a dual-wavelength photoconversion method, confines activation to a single cell in three dimensions by requiring both blue and red light beams to intersect. The same photochemistry can release optogenetic actuators, so a single illumination both marks and edits a cell. Combined with oblique plane microscopy for continuous volumetric imaging, this architecture enables conditional intervention throughout development or tumour evolution, generating genetic mosaics with internal controls that turn lineage tracing from passive recording into an experimental test of which events were required for a given fate. In this perspective, an integrated optical platform is outlined that couples primed conversion, optogenetic actuators and oblique plane microscopy to achieve causal, real-time intervention on defined cells.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 2","pages":"1-8"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11373108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148504924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low Threshold Single Mode Lasing from Suspended Membrane Photonic Crystal Surface Emitting Lasers","authors":"Balthazar Temu;Tomas Peach;Tyrone Jones;Shangfeng Liu;Qiang Li","doi":"10.1109/JPHOT.2026.3665000","DOIUrl":"https://doi.org/10.1109/JPHOT.2026.3665000","url":null,"abstract":"Low lasing threshold is desirable in photonic integrated circuits and many other applications in order to reduce the power consumption of the lasing device. Double lattice photonic crystal surface emitting laser utilizing constructive interference between the two lattices can be used to realize lower lasing threshold compared to single lattice devices. Here we demonstrate single mode lasing of a double lattice device and compare to its single lattice counterpart. The device is made of a suspended membrane of InP photonic crystal layer on InP substrate. The average lasing threshold values measured for four single and four double lattice devices were about 43 μJ/cm² and 20 μJ/cm² respectively. This work paves the way to successful realization of low threshold single mode PCSELs for different applications.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"18 2","pages":"1-5"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11396933","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148508414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}