Optics Communications最新文献_第10页

Reconfigurable vortex generation based on phase change material

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-24 DOI: 10.1016/j.optcom.2025.131799

Jiankai Tang , Xinghong Chen , Wei Tao , Yifei Mao

{"title":"Reconfigurable vortex generation based on phase change material","authors":"Jiankai Tang , Xinghong Chen , Wei Tao , Yifei Mao","doi":"10.1016/j.optcom.2025.131799","DOIUrl":"10.1016/j.optcom.2025.131799","url":null,"abstract":"<div><div>The development of reconfigurable optical vortex (OV) generators is of great value because dynamic switching between different orbital angular momentum (OAM) states not only enables high-density data transmission, but also significantly enhances the security of wired and wireless communication networks. However, current dynamic OV generation methods face challenges in terms of alignment conditions, fabrication robustness, device integration and miniaturization, as well as OV generation purity. Here, we theoretically propose a reconfigurable OV generation method by dynamically engineering the photonic band structures via phase change material. OVs are generated by exploiting the winding topology properties of momentum-space polarization distributions around bound states in the continuum (BICs). By switching between different states of phase change materials, the interaction between the target BIC and the incident light can be flexibly selected to achieve OV with tunable OAM. In this work, the geometric phase gradient is generated in momentum space, thereby eliminating the need of beam alignment in real space. The purity of generated OVs approaches nearly 100 % in theory and exhibits robustness against fabrication errors to a certain extent. Using low-loss phase change materials to control the topological properties of the system offers new opportunities for tunable optical devices, on-chip optical communications and other applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131799"},"PeriodicalIF":2.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746582","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

Nanoblocks-enhanced tunable plasmonic sensor based on MIM waveguide with double independent resonators

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-24 DOI: 10.1016/j.optcom.2025.131798

Yongpeng Ren, Fumeng Qin, Desheng Qu, Yiping Sun, Chunlei Li

{"title":"Nanoblocks-enhanced tunable plasmonic sensor based on MIM waveguide with double independent resonators","authors":"Yongpeng Ren, Fumeng Qin, Desheng Qu, Yiping Sun, Chunlei Li","doi":"10.1016/j.optcom.2025.131798","DOIUrl":"10.1016/j.optcom.2025.131798","url":null,"abstract":"<div><div>A compact plasmonic sensor structure with silver nanoblocks enhancement is presented. The standard structure is based on the metal-insulator-metal (MIM) waveguide with a silver baffle, an elliptic ring cross cavity and a square frame cavity with a gap. The transmission characteristics of the structure are analyzed by the finite element method. The simulation results show that the structure generates triple Fano resonances. By changing the structural parameters of cavities, there is a good linear relationship between resonance wavelength and the effective length of resonator. Furthermore, the Fano resonances produced by various resonators can be tuned independently by the refractive index of the medium. The standard structure can achieve a sensitivity of 2760 nm/refractive index unit (RIU). By adding silver nanoblocks to the standard structure, the sensitivity of the modified structure reaches 3090 nm/RIU, which is 11.95 % higher than before. In addition, based on the independence of the resonator, the designed structure can realize the simultaneous detection of glucose solution and glycerol. The concentration sensitivities reach 388.7 nm∗ml/g and 403.3 nm∗ml/g, respectively.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131798"},"PeriodicalIF":2.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697780","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

Experimental verification of multi-dimensional geometric shaping in OFDM-VLC system

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-23 DOI: 10.1016/j.optcom.2025.131792

Ruoling Song , Jie Ma , Jia Lu , Jianfei Liu , Xiangye Zeng , Mingming Luo

{"title":"Experimental verification of multi-dimensional geometric shaping in OFDM-VLC system","authors":"Ruoling Song , Jie Ma , Jia Lu , Jianfei Liu , Xiangye Zeng , Mingming Luo","doi":"10.1016/j.optcom.2025.131792","DOIUrl":"10.1016/j.optcom.2025.131792","url":null,"abstract":"<div><div>In this paper, an innovative four-dimensional set-partitioning geometric shaping (4D-SP-GS) modulation format is proposed and experimentally verified in orthogonal frequency division multiplexing based visible light communication (OFDM-VLC). The method optimizes the position of the constellation points by using the quasi-polarization multiplexing. The perfect combination of SP and polarization ring switching (PRS) achieves flexible grouping and ring switching between constellation points, and further expand the minimum Euclidean distance (MED) of constellation points. Orthant symmetry (OS) reduces the complexity of constellation point mapping in 4D space. The entropy of the 4D-SP-GS can reach 8 bit/symbol. The simple real-valued precoding decreases the peak-to-average power ratio (PAPR) of OFDM and equalizes signal-to-noise ratio (SNR) distribution among subcarriers. Compared with traditional polarization-multiplexed 16 quadrature amplitude modulation (PM-16QAM), 4D geometric shell mapping (4D-GSS), 4D circular 256QAM (4D-c256QAM) and 4D-256PRS, experimental results show that the 4D-SP-GS can achieve a maximum operating range improvement of 50/45/30/8 mV when volts-peak-to-peak (VPP) is 60 mV–110 mV and 130/75/50/25 MS/s sampling rate improvement when the bit error rate (BER) satisfies 3.8 × 10<sup>−3</sup>, thus effectively improve the anti-nonlinearity performance of the system.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131792"},"PeriodicalIF":2.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697776","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

Polarization independent metal–insulator–metal layered wide-band absorber with large angular stability for radar cross section reduction application

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-23 DOI: 10.1016/j.optcom.2025.131751

Sivanantham Arumugam, Srinivasa Rao Inabathini

{"title":"Polarization independent metal–insulator–metal layered wide-band absorber with large angular stability for radar cross section reduction application","authors":"Sivanantham Arumugam, Srinivasa Rao Inabathini","doi":"10.1016/j.optcom.2025.131751","DOIUrl":"10.1016/j.optcom.2025.131751","url":null,"abstract":"<div><div>A wide-band polarization independent microwave absorber has been proposed using two cross dipole resonators and square nodes with an unit cell size of <span><math><mrow><mn>0</mn><mo>.</mo><mn>18</mn><msub><mrow><mi>λ</mi></mrow><mrow><mi>L</mi></mrow></msub><mo>×</mo><mn>0</mn><mo>.</mo><mn>18</mn><msub><mrow><mi>λ</mi></mrow><mrow><mi>L</mi></mrow></msub></mrow></math></span>, where <span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>L</mi></mrow></msub></math></span> represents the wavelength at the lowest operating frequency. The cross-dipole based resonating patterns with four nodes are designed on the FR4 dielectric layer. Lumped resistors are employed on the top layer to achieve the wide bandwidth. The bottom-most layer of the proposed absorber structure is made of copper. An air-spacer layer has been deployed between the substrate and the metallic ground layer to extend the low frequency absorption. The fractional bandwidth of the absorber is 93% with the absorption greater than 90% in the operating frequency range of 2.76 GHz-7.56 GHz. The profile of the proposed absorber is 0.08<span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>L</mi></mrow></msub></math></span>. The unique characteristic of the proposed absorber structure is that the polarization conversion ratio of the structure is less than 0.1. The absorptivity of the proposed structure is more than 80% for a wide range of incident angles up to 60°. The absorption characteristics are found to be stable for both transverse electric and transverse magnetic polarized incident waves under normal incidence. Further, the mono-static radar cross section reduction of the proposed absorber structure has been verified to be greater than 20 <span><math><mrow><mtext>dB</mtext><mspace></mspace><mtext>m</mtext><msup><mrow></mrow><mrow><mi>2</mi></mrow></msup></mrow></math></span> in the operating bandwidth.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131751"},"PeriodicalIF":2.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682147","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

Wideband continuously-tuned matrix DFB laser array assisted with enhanced self-heating effect based on REC technique

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-23 DOI: 10.1016/j.optcom.2025.131759

Zizhuo Li , Yaqiang Fan , Zhenxing Sun , Wentao Sun , Yuan Lv , Wei Yuan , Zijiang Yang , Jiale Xu , Pan Dai , Yan Wang , Pengfei Xu , Xiangfei Chen

{"title":"Wideband continuously-tuned matrix DFB laser array assisted with enhanced self-heating effect based on REC technique","authors":"Zizhuo Li , Yaqiang Fan , Zhenxing Sun , Wentao Sun , Yuan Lv , Wei Yuan , Zijiang Yang , Jiale Xu , Pan Dai , Yan Wang , Pengfei Xu , Xiangfei Chen","doi":"10.1016/j.optcom.2025.131759","DOIUrl":"10.1016/j.optcom.2025.131759","url":null,"abstract":"<div><div>In this letter, we propose and experimentally demonstrate a wideband continuously-tuned matrix distributed feedback (DFB) laser array. This DFB laser array is developed based on the reconstruction-equivalent-chirp (REC) technique and has an enhanced self-heating effect. The laser array is made up of 24 DFB lasers that are arranged in an 8 × 3 matrix interleaving pattern. Moreover, it integrates a three-level cascaded Y-branch optical combiners and an active semiconductor optical amplifier (SOA) on a single chip. In order to achieve continuous wavelength tuning, we increase the resistance of the laser to enhance the self-heating effect of the laser, which in turn expands the current-tuned wavelength range of the laser. The tunable 8 × 3 REC-DFB laser array employs a current tuning method. Consequently, in comparison with the conventional wavelength tuning methods relying on thermoelectric cooler (TEC), it can reach lower power consumption and faster continuous wavelength tuning. The proposed laser array is applicable to a 49 nm continuous wavelength tuning situation. Its output power is more than 38 mW, and all side mode suppression ratios (SMSRs) are higher than 40 dB. This research provides a new path for realizing semiconductor lasers with low power consumption and a wide tuning range.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131759"},"PeriodicalIF":2.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682085","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

Wide-field-of-view rapid acquisition and tracking control for portable optical communication systems

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-22 DOI: 10.1016/j.optcom.2025.131790

Xuan Wang , Xiangsheng Meng , Junfeng Han , Chen Wang , Yinghong He

{"title":"Wide-field-of-view rapid acquisition and tracking control for portable optical communication systems","authors":"Xuan Wang , Xiangsheng Meng , Junfeng Han , Chen Wang , Yinghong He","doi":"10.1016/j.optcom.2025.131790","DOIUrl":"10.1016/j.optcom.2025.131790","url":null,"abstract":"<div><div>Optical communication technology has been extensively applied in long-distance space communication due to its numerous advantages. With the advancement of CubeSat technology, portable optical communication systems have also emerged. When applied to ground-based scenarios, this technology can effectively support emergency high-speed communication in environments where radio frequencies are unavailable or restricted. However, its primary limitation lies in the rapid acquisition of wide-field-of-view laser links. To address this challenge, we propose a compact coaxial transceiver design for a portable optical communication terminal, utilizing Micro-Electro-Mechanical Systems (MEMS) micromirrors and a Quadrant Detector (QD). Furthermore, we developed a QD spot position deviation rapid acquisition algorithm for quickly determining the laser spot position on the QD. This represents a novel and efficient technique for achieving fast and precise large-area acquisition and tracking control. Experimental results demonstrate that the proposed portable optical communication terminal is capable of rapid deployment and efficient laser link acquisition, completing acquisition within 83 s over a distance of 506 m, within a 60° × 40° field of view. These findings mark a significant advancement toward the practical application of ground-based portable optical communication technology.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131790"},"PeriodicalIF":2.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682152","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

Evolution of beam spatial characteristics in high-power Yb:YAG Innoslab amplifier

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-22 DOI: 10.1016/j.optcom.2025.131794

Yuguang Huang , Jie Guo , Jinfeng Li , Zichen Gao , Xiaoyan Liang

引用次数: 0

Depth estimation via shift-photography in Alvarez Lens imaging systems

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-22 DOI: 10.1016/j.optcom.2025.131760

Jiapu Yan, Menghao Li, Tingting Jiang, Huajun Feng, Zhihai Xu, Qi Li, Yueting Chen

引用次数: 0

Performance evaluation of large-aperture highly reflective mirrors for high-power laser applications with reflectance mapping

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-21 DOI: 10.1016/j.optcom.2025.131786

Yanling Han , Bincheng Li , Hao Cui , Jing Wang

{"title":"Performance evaluation of large-aperture highly reflective mirrors for high-power laser applications with reflectance mapping","authors":"Yanling Han , Bincheng Li , Hao Cui , Jing Wang","doi":"10.1016/j.optcom.2025.131786","DOIUrl":"10.1016/j.optcom.2025.131786","url":null,"abstract":"<div><div>The performance evaluation of large-aperture highly reflective (HR) mirrors, which are widely used in high-power laser systems, is essential for the long-term operation of these laser systems. In this study, the development of the HR mirror's reflectance distribution, which is measured via cavity ring-down (CRD) technique, to be a general quality control tool for the large-aperture HR mirrors is attempted. Various parameters and data analysis methods are defined and developed to evaluate the performance of the large-aperture HR mirrors. Specifically, we introduced the maximum-probability reflectance (<em>R</em><sub><em>max-p</em></sub>), which describes the reflectance distribution excluding the influence of defects, and the maximum-residual-probability reflectance (<em>R</em><sub><em>max-r-p</em></sub>), which characterizes the reflectance distribution affected by defects. Additionally, we discussed the full-width at half-maximum (FWHM) of the residual reflectance distribution, which quantifies the variation in reflectance due to defects, as well as the reflectance difference (Δ<em>R</em>) defined as the difference between <em>R</em><sub><em>max-p</em></sub> and <em>R</em><sub><em>max-r-p</em></sub>. These parameters collectively provide a comprehensive assessment of the HR mirrors' performance. The developed parameters and data analysis methods were applied to the performance evaluation of 68 HR mirrors with diameters ranging from 200 mm to 400 mm, with 0- or 45-degree angle of incidence (AOI) and fused silica or sapphire substrates. Statistical analysis revealed that HR mirrors with a 0-degree AOI have higher reflectance than that with a 45-degree AOI, while HR mirrors deposited on fused silica substrates showed slightly better reflection performance than that deposited on sapphire substrates. The statistical results demonstrated that the proposed parameters and data analysis methods are helpful to evaluate the performance of large-aperture HR mirrors.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131786"},"PeriodicalIF":2.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697684","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

Efficient third harmonic generation based on the spatial distribution characteristics of the second harmonic generation efficiency

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-21 DOI: 10.1016/j.optcom.2025.131785

Mingheng Yuan , Yuan Sui , Xiaopeng Liu , Yuan Wu , Wen Huang , Guangyin Zhang , Zhenao Bai , Zhongwei Fan

{"title":"Efficient third harmonic generation based on the spatial distribution characteristics of the second harmonic generation efficiency","authors":"Mingheng Yuan , Yuan Sui , Xiaopeng Liu , Yuan Wu , Wen Huang , Guangyin Zhang , Zhenao Bai , Zhongwei Fan","doi":"10.1016/j.optcom.2025.131785","DOIUrl":"10.1016/j.optcom.2025.131785","url":null,"abstract":"<div><div>Picosecond ultraviolet lasers are extensively utilized in precision manufacturing and material processing, where system designs prioritize longevity and stability. However, the emphasis on durability and simplicity—exemplified by extra-cavity configurations with LBO crystals—often compromises the overall conversion efficiency, underscoring the need for further optimization. We developed a simulation model based on the spatial distribution characteristics of second harmonic generation (SHG) efficiency to guide the design of an efficient third harmonic generation (THG) system. We developed a simulation model that reveals the functional relationship between the fundamental peak power and the optimal beam diameter. Based on the simulation results, we optimized the design of a highly efficient third harmonic generation system. Consequently, we achieved a conversion efficiency of <span><math><mrow><mn>17.89</mn><mo>%</mo></mrow></math></span> for wavelength conversion from <span><math><mrow><mn>1030</mn><mi>n</mi><mi>m</mi></mrow></math></span> to <span><math><mrow><mn>343</mn><mi>n</mi><mi>m</mi></mrow></math></span>. The design integrated disk regenerative amplification and single-crystal fiber technologies for the first time, delivering an ultraviolet output with an average power of <span><math><mrow><mn>30.2</mn><mi>W</mi></mrow></math></span>. This method advances the third harmonic generation efficiency and offers new pathways for compact, high-performance picosecond ultraviolet laser development in scientific and industrial domains.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131785"},"PeriodicalIF":2.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682159","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