Xu Liu;Lin Ma;Yijun Yu;Qiancheng Yu;Jinhua Wu;Zuyuan He
{"title":"Hybrid Polymer Waveguide With Large Refractive Index Contrast for High-Density Optical Interconnects","authors":"Xu Liu;Lin Ma;Yijun Yu;Qiancheng Yu;Jinhua Wu;Zuyuan He","doi":"10.1109/LPT.2024.3516365","DOIUrl":"https://doi.org/10.1109/LPT.2024.3516365","url":null,"abstract":"We propose polymer waveguides with large refractive index contrast by adopting organic-inorganic hybrid resin and fluorinated acrylate resin as core and cladding materials, respectively. Both types of polymer materials are UV-curable and exhibit excellent compatibility throughout the fabrication process. The fabricated hybrid waveguides show good stabilities and the additional loss due to the adoption of two types of materials is negligible. In the experiment, we succeeded in the design and fabrication of hybrid polymer waveguides with a relative refractive index contrast (\u0000<inline-formula> <tex-math>$Delta $ </tex-math></inline-formula>\u0000) as high as 7.7%. The measured bending loss of the waveguide is about 0.1 dB/90° turning under a bending radius of 1 mm at a wavelength of 1310 nm which is critical in realizing waveguide with complex topology and ultra-high density. The core dimension of the waveguide is \u0000<inline-formula> <tex-math>$4.5 times ; 4.5 ; mu $ </tex-math></inline-formula>\u0000m2 which guarantees low-loss interconnection with a typical silicon chip. The proposed method is useful in tuning the refractive index of waveguides in a wide range and the fabricated waveguide is promising for high-density optical interconnects application.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"125-128"},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Compact Folded Slotline Bandpass Filter Based on SSPPs With Improved Out-of-Band Rejection","authors":"Yun Fang;Jiahao Wu;Longhui He;Hailong Yang","doi":"10.1109/LPT.2024.3516355","DOIUrl":"https://doi.org/10.1109/LPT.2024.3516355","url":null,"abstract":"A compact spoof surface plasmon polaritons (SSPPs) bandpass filter (BPF) with improved out-of-band rejection is proposed in this letter. By employing a novel folded slotline cell, the filter achieves a 67% reduction in longitudinal size compared to traditional rectangular slotline cells at the same cutoff frequency, and the filter measures \u0000<inline-formula> <tex-math>$0.88lambda $ </tex-math></inline-formula>\u0000g \u0000<inline-formula> <tex-math>$times 0.16lambda $ </tex-math></inline-formula>\u0000g, where \u0000<inline-formula> <tex-math>$lambda $ </tex-math></inline-formula>\u0000g is the guided wavelength at the center frequency, which significantly shortens its electrical length. The lower cutoff frequency is adjusted by the microstrip-slot transition structure, and the higher cutoff frequency is determined by the depth of the SSPPs unit cell groove, which forms a BPF with controllable frequency band. In addition, the performance of the filter with and without unit symmetry is also analyzed, indicating that the filter of making symmetry structure can obtain better performance with the same size. The simulation results demonstrate that the proposed filter has a passband of 1.3-4.1GHz, and superior out-of-band suppression. To validate the accuracy of the simulation results, the filter proposed in this study is fabricated and subjected to empirical measurement, and the experimental outcomes confirm the practical feasibility of the proposed design.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 2","pages":"85-88"},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142858983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Machine Learning Assisted High Precision Vector Bending Sensor Based on Remodulate LPFG","authors":"Chong Niu;Yichao Wang;Yanru Kou;Jiabin Wang;Xiaoyang Li;Jiarui Chen;Xinyu Yang;Chunlian Lu;Tao Geng;Weimin Sun","doi":"10.1109/LPT.2024.3516133","DOIUrl":"https://doi.org/10.1109/LPT.2024.3516133","url":null,"abstract":"Vector curvature fiber sensors have significant applications in many fields. Traditional fiber sensors rely on single peak demodulation, which often leads to inaccurate demodulation results. In this letter, a high-precision vector bending fiber sensor named Remodulate long-period fiber grating(Remodulate LPFG) is designed. We use the Residual multilayer perceptron model, which fully utilizes the information of multiple modes in the full spectrum to predict vector curvature. The results of the experiment show that the prediction accuracy is 99.93% with a mean absolute error (MAE) of 1.8° for bending direction measurement and 98.92% with an MAE of \u0000<inline-formula> <tex-math>$0.04~m^{-1}$ </tex-math></inline-formula>\u0000 for the curvature measurement. Our experiments demonstrate that our model has high precision prediction. The high precision prediction and compacting structure consume Remodulate LPFG can unleash enormous value in engineering applications.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 2","pages":"113-116"},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142858990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigating the Impact of Dosage Factor on Scattering and Image Quality in Quantum-Dot Displays","authors":"Ming Yi Lin","doi":"10.1109/LPT.2024.3513699","DOIUrl":"https://doi.org/10.1109/LPT.2024.3513699","url":null,"abstract":"This study explores the relationship between dosage factor (DoF) and scattering ratio (SR) in quantum-dot color conversion films (QDCF) for display technology. Quantum dots (QDs) enable color conversion but induce light scattering, impacting image quality. Using LightTools simulations, we identified three phases: DoF < 0.2 (mm\u0000<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>\u0000wt%) focuses on color conversion, 0.2 < DoF < 1.6 (mm\u0000<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>\u0000wt%) shows a linear increase in scattering, and DoF > 1.6 (mm\u0000<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>\u0000wt%) leads to scattering saturation. The optimal DoF range is 0.25–0.35 (mm\u0000<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>\u0000wt%), balancing effective color conversion with minimal scattering. This study provides a streamlined approach for designing QDCF displays while maintaining high image quality.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 2","pages":"73-76"},"PeriodicalIF":2.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}