Pub Date : 2025-12-31DOI: 10.1109/JSTQE.2025.3650043
Robert T. Schwarz;Hung Le Son;Marcus T. Knopp;Andreas Knopp
Optical feeder links (OFLs) to geostationary orbit (GEO) satellites present a promising solution to significantly enhance the throughput of satellite systems, especially those with high data rate demands, such as satellite constellations. However, cloud coverage substantially increases the likelihood of link outages, thereby reducing the availability of optical ground stations (OGSs) and limiting the number of possible connections between the GEO and OGS networks. This paper introduces a maxflow-based OFL planning concept aimed at maximizing the number of ground-to-GEO OFL connections under the influence of dynamic cloud coverage. Various network scenarios are considered—featuring different numbers of satellites, OGSs, and varying degrees of visibility correlation—to optimize the network design. The average system capacity is estimated through Monte Carlo simulations, while system availability is stochastically evaluated. Simulation results show that network capacity depends mainly on the number of GEO satellites, while visibility correlation has a strong impact on availability. Furthermore, the simulations reveal that even under a high correlation of visibility and a high probability of link outages, only a small number of additional OGSs are sufficient to achieve the theoretical upper bound of capacity. These insights can contribute to costefficient network design by identifying the optimal number of GEO satellites and OGSs required to meet operational demands.
{"title":"Optical Feeder Links for Multi-GEO Multi-OGS Networks: Nodes Analysis to Maximize Connectivity Under Dynamic Cloud Coverage","authors":"Robert T. Schwarz;Hung Le Son;Marcus T. Knopp;Andreas Knopp","doi":"10.1109/JSTQE.2025.3650043","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3650043","url":null,"abstract":"Optical feeder links (OFLs) to geostationary orbit (GEO) satellites present a promising solution to significantly enhance the throughput of satellite systems, especially those with high data rate demands, such as satellite constellations. However, cloud coverage substantially increases the likelihood of link outages, thereby reducing the availability of optical ground stations (OGSs) and limiting the number of possible connections between the GEO and OGS networks. This paper introduces a maxflow-based OFL planning concept aimed at maximizing the number of ground-to-GEO OFL connections under the influence of dynamic cloud coverage. Various network scenarios are considered—featuring different numbers of satellites, OGSs, and varying degrees of visibility correlation—to optimize the network design. The average system capacity is estimated through Monte Carlo simulations, while system availability is stochastically evaluated. Simulation results show that network capacity depends mainly on the number of GEO satellites, while visibility correlation has a strong impact on availability. Furthermore, the simulations reveal that even under a high correlation of visibility and a high probability of link outages, only a small number of additional OGSs are sufficient to achieve the theoretical upper bound of capacity. These insights can contribute to costefficient network design by identifying the optimal number of GEO satellites and OGSs required to meet operational demands.","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"32 1: Advances in Free Space Laser Communications","pages":"1-8"},"PeriodicalIF":5.1,"publicationDate":"2025-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11320252","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145982274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-23DOI: 10.1109/JSTQE.2025.3647224
Yuriy I. Surkov;Isabella A. Serebryakova;Arseniy P. Fashchevskiy;Polina A. Timoshina;Elina A. Genina;Valery V. Tuchin
We present a principal component analysis-based Laser Speckle Contrast Tomography (PCA-LSCT) method that enables simultaneous, independent mapping of vessel depth and blood-flow velocity without any modification to the optical layout of conventional laser speckle contrast imaging (LSCI). Raw speckle frames are decomposed by a principal component analysis into a static component–the Static Speckle Contrast (SSC)–and a dynamic component–the Dynamic Activity Coefficient (DAC). The SSC is linearly correlated with the relative depth of vessels and is invariant to flow speed, whereas the DAC quantifies blood-flow velocity analogously to classical LSCI and is only weakly depth-dependent. Experiments with phantoms containing a model capillary and flow velocities ranging from 1 to 50 mm/s demonstrate high reproducibility of SSC profiles and a strong correlation between the resulting depth maps and ultrasound tomography (r2 = 0.90 for transmitted-light detection, r2 = 0.88 for backscattered-light detection). The suggested approach has been tested in vivo on a ring finger and has confirmed its high potential for providing non-invasive, contactless, depth-resolved 3D angiography.
{"title":"PCA-LSCT: Software-Implemented Laser Speckle Contrast Tomography for Depth-Resolved Blood-Flow Mapping","authors":"Yuriy I. Surkov;Isabella A. Serebryakova;Arseniy P. Fashchevskiy;Polina A. Timoshina;Elina A. Genina;Valery V. Tuchin","doi":"10.1109/JSTQE.2025.3647224","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3647224","url":null,"abstract":"We present a principal component analysis-based Laser Speckle Contrast Tomography (PCA-LSCT) method that enables simultaneous, independent mapping of vessel depth and blood-flow velocity without any modification to the optical layout of conventional laser speckle contrast imaging (LSCI). Raw speckle frames are decomposed by a principal component analysis into a static component–the <italic>Static Speckle Contrast</i> (SSC)–and a dynamic component–the <italic>Dynamic Activity Coefficient</i> (DAC). The SSC is linearly correlated with the relative depth of vessels and is invariant to flow speed, whereas the DAC quantifies blood-flow velocity analogously to classical LSCI and is only weakly depth-dependent. Experiments with phantoms containing a model capillary and flow velocities ranging from 1 to 50 mm/s demonstrate high reproducibility of SSC profiles and a strong correlation between the resulting depth maps and ultrasound tomography (r<sup>2</sup> = 0.90 for transmitted-light detection, r<sup>2</sup> = 0.88 for backscattered-light detection). The suggested approach has been tested <italic>in vivo</i> on a ring finger and has confirmed its high potential for providing non-invasive, contactless, depth-resolved 3D angiography.","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"32 4: Adv. Biophoton. in Emerg. Biomed. Tech. and Dev","pages":"1-9"},"PeriodicalIF":5.1,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145929604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-22DOI: 10.1109/JSTQE.2025.3647115
Mikhail I. Skvortsov;Kseniya V. Kolosova;Sofia R. Abdullina;Zhibzema E. Munkueva;Alexander V. Dostovalov;Evgeniy V. Podivilov;Sergey A. Babin
The effect of an additional random reflector providing self-injection locking of an erbium fiber DFB laser on linewidth narrowing is studied. In a hybrid cavity comprising a short artificial fs-inscribed random reflector in combination with a natural Rayleigh reflector in the form of 100-m SMF fiber connected to the DFB laser the effect is greatly enhanced. The instantaneous linewidth narrowing by 2 orders is demonstrated which is in approximate agreement with theoretical estimation. For the long-term linewidth, the narrowing of approximately 3 orders of magnitude is observed. Thus, a compact and stable single-frequency laser with quite narrow linewidth (<5 Hz long term) for a wide range of application has been developed.
研究了铒光纤DFB激光器中提供自注入锁定的附加随机反射器对线宽变窄的影响。在混合腔中，由短的人造fs随机反射器与自然瑞利反射器（以100 m SMF光纤的形式连接到DFB激光器）组成的混合腔中，效果大大增强。结果表明，瞬时线宽缩小了2个数量级，与理论估计基本一致。对于长期线宽，观察到大约3个数量级的缩小。因此，一种紧凑和稳定的单频激光器，具有相当窄的线宽（<5赫兹长期），广泛的应用已经开发出来。
{"title":"DFB Fiber Laser Line Narrowing Due to Self-Injection Locking in a Hybrid Cavity With Random Reflector","authors":"Mikhail I. Skvortsov;Kseniya V. Kolosova;Sofia R. Abdullina;Zhibzema E. Munkueva;Alexander V. Dostovalov;Evgeniy V. Podivilov;Sergey A. Babin","doi":"10.1109/JSTQE.2025.3647115","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3647115","url":null,"abstract":"The effect of an additional random reflector providing self-injection locking of an erbium fiber DFB laser on linewidth narrowing is studied. In a hybrid cavity comprising a short artificial fs-inscribed random reflector in combination with a natural Rayleigh reflector in the form of 100-m SMF fiber connected to the DFB laser the effect is greatly enhanced. The instantaneous linewidth narrowing by 2 orders is demonstrated which is in approximate agreement with theoretical estimation. For the long-term linewidth, the narrowing of approximately 3 orders of magnitude is observed. Thus, a compact and stable single-frequency laser with quite narrow linewidth (<5 Hz long term) for a wide range of application has been developed.","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"32 5: Self-Injection Locked Lasers and Assoc. Sys.","pages":"1-8"},"PeriodicalIF":5.1,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145929576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-15DOI: 10.1109/JSTQE.2025.3644635
{"title":"2025 Index IEEE Journal of Selected Topics in Quantum Electronics","authors":"","doi":"10.1109/JSTQE.2025.3644635","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3644635","url":null,"abstract":"","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"31 6: Photon. for Climate Chng. Mitigation and Adapt.","pages":"1-88"},"PeriodicalIF":5.1,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11300733","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145778217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-15DOI: 10.1109/JSTQE.2025.3644240
Mojdeh Mansouri;Abolfazl Aghili;Amir Mohammad Ghanei;Sara Darbari;Mohammad Kazem Moravvej-Farshi
In the rapidly evolving field of nanotechnology, the ability to manipulate microscopic particles with precision at far-field distances remains a challenging endeavor. This paper introduces a dynamically tunable optical vortex based on elliptical gold nano-antenna arrays, enabling real-time control over the focal point position of optical vortex. By allowing wavelength-dependent precise adjustments of focal point positions over a range of several micrometers, our method significantly enhances particle manipulation capabilities, compared with traditional static plasmonic tweezers. We demonstrate the generation of far-field optical vortices, achieving effective trapping of nanoparticles with a dynamically tunable trapping distance up to around 14.7 μm from the metasurface, well beyond the near-field limit in conventional plasmonic tweezers. This advancement addresses limitations associated with conventional plasmonic manipulation, such as detrimental thermal effects and confinement to the near-field region. Besides representing a significant progression in nanoparticle manipulation techniques, this innovative platform opens new avenues for applications in optical micro-robotics and advanced material structuring, propelling the field forward and inviting further exploration of tunable optical forces.
{"title":"Optical Vortices for Dynamically Tunable Far-Field Particle Manipulation","authors":"Mojdeh Mansouri;Abolfazl Aghili;Amir Mohammad Ghanei;Sara Darbari;Mohammad Kazem Moravvej-Farshi","doi":"10.1109/JSTQE.2025.3644240","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3644240","url":null,"abstract":"In the rapidly evolving field of nanotechnology, the ability to manipulate microscopic particles with precision at far-field distances remains a challenging endeavor. This paper introduces a dynamically tunable optical vortex based on elliptical gold nano-antenna arrays, enabling real-time control over the focal point position of optical vortex. By allowing wavelength-dependent precise adjustments of focal point positions over a range of several micrometers, our method significantly enhances particle manipulation capabilities, compared with traditional static plasmonic tweezers. We demonstrate the generation of far-field optical vortices, achieving effective trapping of nanoparticles with a dynamically tunable trapping distance up to around 14.7 μm from the metasurface, well beyond the near-field limit in conventional plasmonic tweezers. This advancement addresses limitations associated with conventional plasmonic manipulation, such as detrimental thermal effects and confinement to the near-field region. Besides representing a significant progression in nanoparticle manipulation techniques, this innovative platform opens new avenues for applications in optical micro-robotics and advanced material structuring, propelling the field forward and inviting further exploration of tunable optical forces.","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"32 3: Nanophotonics, Metamaterials and Plasmonics","pages":"1-8"},"PeriodicalIF":5.1,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145929628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-10DOI: 10.1109/JSTQE.2025.3630954
{"title":"IEEE Journal of Selected Topics in Quantum Electronics Topic Codes and Topics","authors":"","doi":"10.1109/JSTQE.2025.3630954","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3630954","url":null,"abstract":"","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"31 6: Photon. for Climate Chng. Mitigation and Adapt.","pages":"C4-C4"},"PeriodicalIF":5.1,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11293813","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-10DOI: 10.1109/JSTQE.2025.3564806
{"title":"Call for Papers: Special issue on Advances in Semiconductor Surface-emitting Lasers: VCSELs and PCSELs","authors":"","doi":"10.1109/JSTQE.2025.3564806","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3564806","url":null,"abstract":"","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"31 6: Photon. for Climate Chng. Mitigation and Adapt.","pages":"1-2"},"PeriodicalIF":5.1,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11293806","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-10DOI: 10.1109/JSTQE.2025.3625363
{"title":"Call for Papers: Special issue on Inverse Design of Photonic Applications Using Quantum and Classical Computing","authors":"","doi":"10.1109/JSTQE.2025.3625363","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3625363","url":null,"abstract":"","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"31 6: Photon. for Climate Chng. Mitigation and Adapt.","pages":"1-2"},"PeriodicalIF":5.1,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11293804","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-10DOI: 10.1109/JSTQE.2025.3630952
{"title":"IEEE Journal of Selected Topics in Quantum Electronics Information for Authors","authors":"","doi":"10.1109/JSTQE.2025.3630952","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3630952","url":null,"abstract":"","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"31 6: Photon. for Climate Chng. Mitigation and Adapt.","pages":"C3-C3"},"PeriodicalIF":5.1,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11293802","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-10DOI: 10.1109/JSTQE.2025.3564814
{"title":"Call for Papers: Special issue on Advances in High-Speed Intensity Modulation and Direct Detection Technologies","authors":"","doi":"10.1109/JSTQE.2025.3564814","DOIUrl":"https://doi.org/10.1109/JSTQE.2025.3564814","url":null,"abstract":"","PeriodicalId":13094,"journal":{"name":"IEEE Journal of Selected Topics in Quantum Electronics","volume":"31 6: Photon. for Climate Chng. Mitigation and Adapt.","pages":"1-2"},"PeriodicalIF":5.1,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11293812","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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