Optics Communications最新文献_第8页

Hierarchical MIMO equalizer for PDM PS-1024-QAM coherent optical transmission over DNANF DNANF上PDM PS-1024-QAM相干光传输的分层MIMO均衡器

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-21 DOI: 10.1016/j.optcom.2026.132941

Jiamin Fan , Yu Qin , Tingyu Fu , Jie Zhu , Yichun Shen , Limin Xiao , Mingyi Gao

{"title":"Hierarchical MIMO equalizer for PDM PS-1024-QAM coherent optical transmission over DNANF","authors":"Jiamin Fan , Yu Qin , Tingyu Fu , Jie Zhu , Yichun Shen , Limin Xiao , Mingyi Gao","doi":"10.1016/j.optcom.2026.132941","DOIUrl":"10.1016/j.optcom.2026.132941","url":null,"abstract":"<div><div>In this work, we propose a hierarchical multiplexed multiple-input multiple-output (MIMO) equalizer with adaptive compensation capabilities, synergistically integrated into a polarization-division multiplexed and probabilistically shaped 1024-QAM coherent optical transmission system. Through hierarchical progressive compensation, the architecture achieves deep synergistic compensation for polarization crosstalk, IQ gain and phase imbalance, timing skew, and residual inter-symbol interference. This architecture is experimentally validated over a 5-km double nested anti-resonant nodeless fiber link operating at 20 GBaud. The proposed equalizer effectively mitigates signal impairments and inter-channel crosstalk inherent to high-order modulation formats, while maintaining spectral efficiency. Finally, the three-stage MIMO equalizer achieves an approximately 1.2-dB improvement in optical signal-to-noise ratio sensitivity over the two-stage counterpart at the soft-decision forward error correction threshold, alongside a spectral efficiency of 16.19 bits/s/Hz.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"607 ","pages":"Article 132941"},"PeriodicalIF":2.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Transmission characteristics of Laguerre–Gaussian vortex beams under scattering in a smoky environment 烟雾环境中散射下拉盖尔-高斯涡旋光束的传输特性

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-10 DOI: 10.1016/j.optcom.2026.132876

Jingyao Hou , Xueping Sun , Chen He , Xizhi Wan , Wang Wang , Ziyu Tian , Shuyi Wang , Shun Zhou , Weiguo Liu , Jin Cheng , Siqi Wang , Jiaming Su

{"title":"Transmission characteristics of Laguerre–Gaussian vortex beams under scattering in a smoky environment","authors":"Jingyao Hou , Xueping Sun , Chen He , Xizhi Wan , Wang Wang , Ziyu Tian , Shuyi Wang , Shun Zhou , Weiguo Liu , Jin Cheng , Siqi Wang , Jiaming Su","doi":"10.1016/j.optcom.2026.132876","DOIUrl":"10.1016/j.optcom.2026.132876","url":null,"abstract":"<div><div>Smoke can scatter and absorb laser beams, leading to significant attenuation and reduced detection accuracy of detectors. In this study, we investigated the capacity of vortex beams with orbital angular momentum (OAM) to mitigate the scattering effects and explored the transmission behavior of Laguerre-Gaussian (LG) beams in smoke at various concentrations. Based on the physical characteristics of smoke particles, the particle size distribution was characterized, and smoke cluster particles were generated using the cluster-cluster aggregation (CCA) model. We examined the effects of the wind speed intensity on smoke diffusion and generate a non-uniform smoke environment. Subsequently, we conducted simulations and experiments to analyze and quantify the scattering and OAM crosstalk properties of LG vortex beams in a smoky environment. The results demonstrate that an increase in the topological charge of an LG vortex beam enhances its transmission capability and results in stronger scattering following interaction with smoke particles. Furthermore, the increase in smoke concentration exacerbates the distortion of the vortex light phase diagram, causing crosstalk from the initial topological value to extend into adjacent modes. At a smoke transmittance of 12.61 %, the original topology (<em>l</em> = 5) remains identifiable, which demonstrates that vortex beams exhibit relatively robust transmission properties under smoky conditions. These findings can serve as a technical reference for improving the resistance of laser systems to smoke interference and offer data support for real-time target reconstruction.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"606 ","pages":"Article 132876"},"PeriodicalIF":2.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A new selection mechanism for hybrid FSO/mmWave systems FSO/毫米波混合系统的一种新的选择机制

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-12 DOI: 10.1016/j.optcom.2026.132875

Heyam Hassan , Saud Althunibat , Scott Miller , Mazen Hasna , Khalid Qaraqe

{"title":"A new selection mechanism for hybrid FSO/mmWave systems","authors":"Heyam Hassan , Saud Althunibat , Scott Miller , Mazen Hasna , Khalid Qaraqe","doi":"10.1016/j.optcom.2026.132875","DOIUrl":"10.1016/j.optcom.2026.132875","url":null,"abstract":"<div><div>Hybrid Free-Space Optical (FSO)/millimeter wave (mmWave) communication systems have garnered significant attention due to their ability to deliver high data rates while maintaining reliable connectivity across diverse atmospheric conditions. However, traditional switching mechanisms, such as signal-to-noise ratio (SNR) threshold-based, rely only on the link’s instantaneous SNR, ignoring the link’s bandwidth, which degrades the overall system’s reliability and efficiency. In order to mitigate this challenge, a channel capacity-based switching scheme for a hybrid FSO/mmWave system is proposed in this paper. Unlike existing schemes, the proposed mechanism dynamically switches between FSO and mmWave links based on the estimated channel capacity of the two links, rather than relying only on instantaneous channel conditions. This ensures that the system always selects the link with the highest achievable capacity, thereby improving the system’s throughput. The analysis incorporates both intensity modulation/direct detection (IM/DD) and heterodyne detection (HD) techniques under various weather conditions, including clear, hazy, and rainy scenarios. The FSO channel is modeled using the Gamma–Gamma (GG) distribution, while the mmWave link follows the Nakagami-m fading model. Closed-form expressions for key performance metrics, including link utilization and channel capacity for FSO, RF, and the proposed hybrid scheme, are derived and validated through simulation. Additionally, a comparative analysis conducted against existing switching mechanisms demonstrates that the proposed approach significantly enhances the performance of the hybrid FSO/mmWave system.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"606 ","pages":"Article 132875"},"PeriodicalIF":2.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Modeling and correction of higher-order LP modes effects in spectral beam combining 光谱光束组合中高阶LP模效应的建模与校正

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-09 DOI: 10.1016/j.optcom.2026.132900

Siyuan Fang , Kai Zhang , Zhihui Li , Zheqiang Zhong , Bin Zhang

引用次数: 0

Synergistic multi-resonance mode design for highly efficient broadband solar absorption and photothermal conversion using a cross-ring metamaterial array 基于交叉环超材料阵列的高效宽带太阳能吸收和光热转换的协同多共振模式设计

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-10 DOI: 10.1016/j.optcom.2026.132905

Rajib Lochan Ghadei, Rishi Maiti

{"title":"Synergistic multi-resonance mode design for highly efficient broadband solar absorption and photothermal conversion using a cross-ring metamaterial array","authors":"Rajib Lochan Ghadei, Rishi Maiti","doi":"10.1016/j.optcom.2026.132905","DOIUrl":"10.1016/j.optcom.2026.132905","url":null,"abstract":"<div><div>Solar energy, the most abundant renewable resource on Earth, offers a clean and sustainable solution to meet the rising global energy demand. However, existing metamaterial-based solar absorbers often suffer from limited broadband absorption, polarization sensitivity, and narrow angular response, which restrict their practical applicability. To overcome these challenges, we propose a novel Ti/SiO<sub>2</sub>/Ti cross-ring metasurface absorber that synergistically exploits localized surface plasmon resonance, Fabry-Pérot cavity resonance, and magnetic resonance within a single subwavelength unit cell. This multi-resonant coupling enables broadband, polarization-insensitive, and wide-angle absorption performance. Using Lumerical FDTD simulations, the proposed absorber achieves an average absorption of 94.2 % across a wide spectral range of 280–5000 nm, with maximum average absorptions of 96.0 % and 95.8 % for transverse electric and transverse magnetic polarizations, respectively. Near-perfect absorption peaks of 99.9 % are observed at resonance wavelengths of 334 nm and 658 nm. Moreover, the absorption closely matches the AM1.5 solar spectrum, resulting in an excellent solar absorption efficiency of 97 % in the 280–5000 nm range. The structure retains high absorption from normal incidence up to 60° and exhibits a thermal emission efficiency of 96.96 % at 2000 K, along with a photothermal conversion efficiency exceeding 91.5 % over the temperature range of 300–1000 K at a solar concentration factor of 1000. These enhancements demonstrate that the proposed metastructure is a highly promising candidate for advanced solar-thermal applications, including solar water heating, photothermal therapy, and concentrated solar power systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"606 ","pages":"Article 132905"},"PeriodicalIF":2.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Accurate calibration for quarter-wavelength optical thickness of DBRs layer by complementary resonant cavity 互补谐振腔对DBRs层四分之一波长光学厚度的精确校准

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-13 DOI: 10.1016/j.optcom.2026.132914

Xiaowei Qin , Jianjun Li , Jun Deng, Hao Zhai, Yiyang Xie

引用次数: 0

Corrigendum to “Coherent fading suppression method in the COTDR system based on multi-band filtering” [Opt. Commun. 583 (2025) 131696] “基于多频带滤波的COTDR系统相干衰落抑制方法”的勘误表[Opt. common . 583 (2025) 131696]

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-27 DOI: 10.1016/j.optcom.2025.132779

Xiang Sui , Ying Shang , Sheng Huang , Wenan Zhao , Xiaohan Qiao , Guangqiang Liu , Chunmei Yao , Shouling Liu , Na Wan , Xianggui Kong , Hong Zhao , Fengming Mou , Zhengying Li , Weitao Wang , Chen Wang , Gangding Peng

引用次数: 0

Reconfigurable beam steering of multimode VCSEL using multifocal metalens based on phase-change material 基于相变材料的多焦超透镜多模VCSEL可重构光束导向

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2025-11-01 DOI: 10.1016/j.optcom.2025.132599

Jiarui Zhao , Xihan Wu , Jian Feng , Shaochi Pan , Zhongmin He , Zhenhuan Qiu , Yichun Chen , Xing Zhang , Wei Miao , Bin Wang , Shihao Ding , Shupeng Deng , Nannan Li , Jinlong Lu , Hui Li , Junying Li , Chuyu Zhong

{"title":"Reconfigurable beam steering of multimode VCSEL using multifocal metalens based on phase-change material","authors":"Jiarui Zhao , Xihan Wu , Jian Feng , Shaochi Pan , Zhongmin He , Zhenhuan Qiu , Yichun Chen , Xing Zhang , Wei Miao , Bin Wang , Shihao Ding , Shupeng Deng , Nannan Li , Jinlong Lu , Hui Li , Junying Li , Chuyu Zhong","doi":"10.1016/j.optcom.2025.132599","DOIUrl":"10.1016/j.optcom.2025.132599","url":null,"abstract":"<div><div>Vertical cavity surface emitting lasers (VCSEL) offer advantages such as low threshold, high modulation speed, and circular beam profiles etc., making them well suited for applications in optical communication and sensing. However, their intrinsic beam divergence limits free-space performance, and conventional beam-shaping optics are not easily integrated. Integrating micro-optical elements directly on the VCSEL facet has thus emerged as an effective approach for on-chip beam control, with commonly used micro-structures including microlens, diffractive optical elements (DOE), metalens and so on. Among various approaches, metalens enable flexible and multifunctional wavefront manipulation, including focusing, collimation, and polarization control. In this work, we design a reconfigurable metalens based on the low-loss phase-change material Sb<sub>2</sub>Se<sub>3</sub>, achieving a continuously tunable focal length from 35 μm to 55 μm, with focusing efficiencies exceeding 54 %. The metalens is further integrated onto the p-side distributed Bragg reflector (p-DBR) of a 1550 nm VCSEL. We investigate the optical compatibility of this monolithic integration scheme by analyzing the influence of the metalens on the spectrum, longitudinal and transverse modes, and far-field divergence of VCSEL. Results show that integration exerts minimal influence on cavity mode stability and confirms the spectral compatibility. This integration approach offers a promising route toward compact and tunable VCSEL based photonic systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"606 ","pages":"Article 132599"},"PeriodicalIF":2.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

The design method of stepped integrated photovoltaic concentrator without light leakage 无漏光梯级集成光伏聚光器的设计方法

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-16 DOI: 10.1016/j.optcom.2026.132921

Shubin Hua , Ning Zhang , Yina Hai , Deqiang Ding , Peng Yin , Zhaolong He , Fangyu Sun , Huidong Guo , Wenda Shao

{"title":"The design method of stepped integrated photovoltaic concentrator without light leakage","authors":"Shubin Hua , Ning Zhang , Yina Hai , Deqiang Ding , Peng Yin , Zhaolong He , Fangyu Sun , Huidong Guo , Wenda Shao","doi":"10.1016/j.optcom.2026.132921","DOIUrl":"10.1016/j.optcom.2026.132921","url":null,"abstract":"<div><div>To enhance the concentration efficiency and space utilization of the concentrator, a stepped integrated photovoltaic concentrating system without Light Leakage has been developed. The interrelationships between the geometric concentration ratio, parabolic coefficient, light guide plate (LGP) step height, and the height of the outermost concentrating module have been thoroughly investigated. To address the issue of light leakage caused by the low acceptance angle after light coupling into the LGP, a design method for a stepped leak-proof light guide plate has been proposed. Considering the solar divergence angle, Fresnel losses, and material absorption, LightTools optical simulation software was used to trace the light rays of the designed system, revealing the impact of the LGP step height, the height of the outermost concentrating module, and the acceptance half-angle on the system's optical efficiency. The simulation results show that, when the step height is 0.1 cm, the geometric concentration ratio reaches 306, with a concentration efficiency of 64.70 %. When the step height increases to 0.5 cm, the geometric concentration ratio decreases to 62, while the concentration efficiency increases to 83.62 %. Additionally, as the axial error increases from 0° to 0.3°, the average energy flux density decreases from 7011.37 W/m<sup>2</sup> to 6320.74 W/m<sup>2</sup>, with the concentrator efficiency reaching approximately 90.14 % of the peak value. In contrast, as the alignment error increases from 0° to 0.3°, the average energy flux density decreases from 7011.37 W/m<sup>2</sup> to 6674.62 W/m<sup>2</sup>, and the concentrator efficiency reaches approximately 95.1 % of the peak value. Experimental results indicate that the designed concentrator achieves a peak concentration efficiency of 55.8 % at noon.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"607 ","pages":"Article 132921"},"PeriodicalIF":2.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Improved joint subcarrier and power allocation with imperfect SIC in OFDM-NOMA VLC systems OFDM-NOMA VLC系统中SIC不完善的联合副载波和功率分配改进

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2026-06-01 Epub Date: 2026-01-09 DOI: 10.1016/j.optcom.2026.132896

Jiawei Chen, Jian Zhao

引用次数: 0