Optics Communications最新文献

High-sensitivity and multiple fingerprint detection at an exception point in electromagnetic induced transparent metasurfaces

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-05 DOI: 10.1016/j.optcom.2025.131699

Pingsheng Zhang, Menghan Xiong, Xingyan Zhao, Yang Qiu, Shaonan Zheng, Yuan Dong, Qize Zhong, Ting Hu

{"title":"High-sensitivity and multiple fingerprint detection at an exception point in electromagnetic induced transparent metasurfaces","authors":"Pingsheng Zhang, Menghan Xiong, Xingyan Zhao, Yang Qiu, Shaonan Zheng, Yuan Dong, Qize Zhong, Ting Hu","doi":"10.1016/j.optcom.2025.131699","DOIUrl":"10.1016/j.optcom.2025.131699","url":null,"abstract":"<div><div>Electromagnetic induced transparent (EIT) metasurfaces have garnered significant interest in the terahertz (THz) fingerprint sensing field, owing to their capability to enhance light-matter interactions. However, previous EIT metasurfaces typically exhibit unsatisfactory sensitivity and a narrower detection bandwidth, limiting their capability in broadband fingerprint detection. Here, an EIT metasurface characterized by exceptional point and tunable properties is presented. Based on the synchronous gate voltage tuning, this EIT metasurface demonstrates tunability in the range of 2.6–4.1 THz, which facilitates the acquisition of multiple fingerprint from analytes. And through theoretical calculations, the exceptional point was accurately identified, enabling the EIT metasurface to achieve a sensitivity of 1.22 THz<em>/RIU</em>. Most importantly, the proposed EIT metasurface identifies multiple THz fingerprints of melamine, showcasing a excellent capability for fingerprint sensing. The proposed EIT metasurface integrates high sensitivity and tunability, showcasing significant potential for applications in broadband THz fingerprint sensing.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131699"},"PeriodicalIF":2.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562246","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

Coherent fading suppression method in the COTDR system based on multi-band filtering

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-04 DOI: 10.1016/j.optcom.2025.131696

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

{"title":"Coherent fading suppression method in the COTDR system based on multi-band filtering","authors":"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","doi":"10.1016/j.optcom.2025.131696","DOIUrl":"10.1016/j.optcom.2025.131696","url":null,"abstract":"<div><div>In this paper, a multi-band filtering method is proposed and demonstrated to suppress the coherent fading in the coherent optical time-domain reflectometry (COTDR) system. The local light and the Rayleigh backscattered (RBS) light beat together and create the intermediate frequency signal <em>u</em><sub><em>BPD</em></sub>(<em>t</em>). Effective bandwidth <em>BW</em><sub><em>c</em></sub> can be obtained by analysing the frequency composition of <em>u</em><sub><em>BPD</em></sub>(<em>t</em>). Applying band-pass filters with different widths no less than <em>BW</em><sub><em>c</em></sub>, signals with varying amplitude distributions can be obtained. The coherent fading can be eliminated by fusing signals with amplitude evaluation method. The experimental results show that the standard deviation of the demodulated phase is reduced from 0.039 rad to 0.008 rad. Additionally, the signal-to-noise ratio (SNR) of the demodulated signal is 40 dB. The results demonstrated the high reliability of this method.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131696"},"PeriodicalIF":2.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552036","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

Deep learning based channel equalization method for wireless UV MIMO scattering turbulence channel

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-04 DOI: 10.1016/j.optcom.2025.131697

T.A.I.F.E.I. ZHAO , Y.U.Q.I. CHEN , Y.U.X.I.N. SUN , feixiang pan

{"title":"Deep learning based channel equalization method for wireless UV MIMO scattering turbulence channel","authors":"T.A.I.F.E.I. ZHAO , Y.U.Q.I. CHEN , Y.U.X.I.N. SUN , feixiang pan","doi":"10.1016/j.optcom.2025.131697","DOIUrl":"10.1016/j.optcom.2025.131697","url":null,"abstract":"<div><div>Aiming at the problems of traditional equalization methods for ultraviolet (UV) multiple-input multiple-output (MIMO) channels in turbulent environments, such as their strong dependence on a priori knowledge of the channel and the low accuracy in coping with the modeling of complex nonlinear channels, this paper proposes a deep-learning-based equalization method for wireless UV-scattering MIMO channels. The method transforms the MIMO signal into a two-dimensional time series, takes the bidirectional long short-term memory (BiLSTM) with bidirectional sequence feature extraction capability as the core, and supplements it with deep neural network for nonlinear modeling to construct a deep learning network model suitable for UV MIMO channel equalization, so as to realize the accurate recovery of the original MIMO signal. Simulation results show that the scheme exhibits stronger BER and MSE performance compared with the least mean square(LMS) algorithm, recursive least squares(LMS) algorithm, and the equalization scheme based on multilayer long and short-term memory(multi-LSTM). At SNR of 9 dB, the scheme reduces the BER by about 67.9%, compared with the equalization scheme based on multi-LSTM, and has stable equalization effects in turbulence environments with different intensities.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131697"},"PeriodicalIF":2.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562271","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

Research on parallel AES encryption algorithm based on a ternary optical computer

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-04 DOI: 10.1016/j.optcom.2025.131660

Kai Song , Shuzhe Liu , Hejie Wang , Sheng Yang , Liping Yan , Sulan Zhang

{"title":"Research on parallel AES encryption algorithm based on a ternary optical computer","authors":"Kai Song , Shuzhe Liu , Hejie Wang , Sheng Yang , Liping Yan , Sulan Zhang","doi":"10.1016/j.optcom.2025.131660","DOIUrl":"10.1016/j.optcom.2025.131660","url":null,"abstract":"<div><div>The Advanced Encryption Standard (AES) encryption algorithm has never been broken since its introduction, and its security has been widely recognized and adopted widely by numerous countries and organizations. However, the algorithm requires dozens of iterations and each iteration involves a large number of computations, so there are problems such as low encryption efficiency and high computational costs. Aiming at these problems, this paper combines the characteristics of ternary optical computer (TOC), such as many data bits, parallel computation, three-valued encoding, to study and propose a parallel AES encryption scheme based on TOC. This scheme leverages the parallel advantages of TOC to improve the block-by-block encryption mode in the AES encryption algorithm. By employing a parallel computing strategy, it effectively reduces the execution time of the algorithm and significantly enhances encryption efficiency. In addition, this paper introduces three-valued operation logic on the basis of binary Exclusive OR(XOR) operation and constructs a set of three-valued XOR (T-XOR) standards to further improve the operation efficiency of AES encryption algorithm on TOC. Through the in-depth analysis of the algorithm resource consumption and time efficiency, and combined with the experimental verification, it can be concluded that the parallel AES encryption algorithm based on TOC has better computing efficiency and time effectiveness, which demonstrates the advantages of TOC in dealing with large-scale computing tasks.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131660"},"PeriodicalIF":2.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562247","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

Ring-shaped multi-filament array formation in fused silica using center-blocked femtosecond laser pulses

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-03 DOI: 10.1016/j.optcom.2025.131691

Ting Zhang , Dongwei Li , Zhongzheng Zhang , Tao Wei , Zuoqiang Hao , Lanzhi Zhang

引用次数: 0

Enhancing long-distance optical link performance in MDM systems with multi-stage amplification and systematic design

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-01 DOI: 10.1016/j.optcom.2025.131687

Wenxuan Xu , Li Pei , Jianshuai Wang , Zhouyi Hu , Jingjing Zheng , Bing Bai

{"title":"Enhancing long-distance optical link performance in MDM systems with multi-stage amplification and systematic design","authors":"Wenxuan Xu , Li Pei , Jianshuai Wang , Zhouyi Hu , Jingjing Zheng , Bing Bai","doi":"10.1016/j.optcom.2025.131687","DOIUrl":"10.1016/j.optcom.2025.131687","url":null,"abstract":"<div><div>Few-mode erbium-doped fiber amplifiers (EDFAs) are crucial for long-distance transmission and modal power management. Current research primarily focuses on gain equalization within individual amplifiers. However, the gain of the amplifier is closely related to the input power. Variations in modal loss result in power disparities among different signal modes, causing gain instability and adversely impacting the system's overall performance. In multi-stage links, even a single amplifier with minimal gain discrepancy might create unequal amplification in the subsequent stage due to difference modal losses. After cascading multiple amplifiers, the imbalance will become even more severe. We have designed a target loss compensation erbium-doped fiber for multi-stage amplification. By considering both gain differences and fiber losses, we manipulate the doping structure to intentionally introduce differential modal gain to compensate for various modal losses. With a power disparity threshold set at 2 dB, the tolerance of cascaded inline amplifiers has been enlarged from 2 to 15, significantly extending the permissible relay distance from 250 km to 2000 km. The method no longer focuses solely on the performance of individual amplifiers but examines the power management of the entire link. The results clearly demonstrate the effectiveness of the loss compensation strategy. It provides a robust and practical method for mode power management without increasing the complexity.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131687"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562234","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

Research on electro-optical chaotic communication based on optical feedback mutual injection

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-01 DOI: 10.1016/j.optcom.2025.131686

Ke-Yuan Mo , Yu-Gang Huang , Zhao-Yun Li , Zhi-Yong Tao , Ya-Xian Fan

{"title":"Research on electro-optical chaotic communication based on optical feedback mutual injection","authors":"Ke-Yuan Mo , Yu-Gang Huang , Zhao-Yun Li , Zhi-Yong Tao , Ya-Xian Fan","doi":"10.1016/j.optcom.2025.131686","DOIUrl":"10.1016/j.optcom.2025.131686","url":null,"abstract":"<div><div>In this paper, an electro-optical chaotic communication scheme based on optical feedback inter-injection is proposed, which employs two inter-injection structures consisting of intensity-modulated and phase-modulated feedback branches and introduces optical feedback at the intensity-modulated end to realize a chaotic signal output with high complexity. Simulation results show that when the feedback gain coefficient is 0.6, the alignment entropy of the system reaches more than 0.9, which possesses optical chaotic signal output characteristics with high complexity, and when the feedback gain coefficient is lower than 0.1, the output time series starts bifurcation behavior, which does not require very large feedback gain coefficients under the condition of which the system time-delay characteristics can be hidden. At the same time, the scheme has less influence on the synchronization by the feedback gain coefficient mismatch and higher sensitivity to the time delay mismatch parameter, which indicates that the scheme can enhance the robustness of the system while improving the high security of the system when the time delay is used as the key.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131686"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562240","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

Biphotons propagation through a thin lens: A Bogoliubov transformation approach

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-01 DOI: 10.1016/j.optcom.2025.131658

V.A. Tomilin , A.M. Rostom , L.V. Il’ichov

引用次数: 0

Target-driven deep learning for optimization design of electromagnetically induced transparency metasurfaces based on lithium tantalate

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-01 DOI: 10.1016/j.optcom.2025.131684

Hongyan Meng , Hengli Feng , Jia Liu , Xin Zhang , Shuang Yang , Hanmo Du , Yang Jia , Yuchuan Lin , Yachen Gao

{"title":"Target-driven deep learning for optimization design of electromagnetically induced transparency metasurfaces based on lithium tantalate","authors":"Hongyan Meng , Hengli Feng , Jia Liu , Xin Zhang , Shuang Yang , Hanmo Du , Yang Jia , Yuchuan Lin , Yachen Gao","doi":"10.1016/j.optcom.2025.131684","DOIUrl":"10.1016/j.optcom.2025.131684","url":null,"abstract":"<div><div>We proposed a target-driven deep learning approach for the optimization design of metasurface. Take electromagnetically induced transparency(EIT)Lithium Tantalate metasurface as example, we showed how the method works. In order to accomplish the optimization design of the metasurface both a forward spectral prediction network (FPN) and an inverse design network (IDN) were designed. The FPN serves as a simulator, it enables rapid optical simulation and design; while the IDN is a hybrid neural network composed of Long Short-Term Memory (LSTM) layer and One-Dimensional Convolutional Layer (Conv1D), which enables rapid and accurate inverse design of metasurfaces. To validate the superior performance, comparative experiments were conducted with fully connected neural networks and One-Dimensional Convolutional Neural Networks (1D-CNN), which demonstrates that our network is both efficient and accurate. By comparing the errors of six structural parameters on the test set, we further analyzed the performance of the inverse design network. Finally, we performed in-depth simulations to investigate the impacts of various structural errors on EIT. Our proposed framework is an efficient strategy for metasurface inverse design, providing a scientific guide for the design of complex, multifunctional metasurfaces.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131684"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562245","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

Modal dispersion in a cylindrical WGM microcavity caused by modal energy dissipation

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-01 DOI: 10.1016/j.optcom.2025.131641

Arkady Novikov , Hiba Rizk , Dmitry Kudashkin , Victor Simonov , Alena Kolesnikova , Ilya Vatnik

引用次数: 0