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Inverse Designed SU8-on-Insulator Platform for Polymer Waveguide Photonics 聚合物波导光子学SU8-on-Insulator平台的逆设计
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-21 DOI: 10.1109/LPT.2025.3591131
Yuting Zhou;Feiyu Jiao;Pei Zeng;Yansong Du;Yuxuan Liu;Simeng Li;Chonghao Zhang;Jingtong Yao;Yufeng Wang;Jian Song;Xun Guan
{"title":"Inverse Designed SU8-on-Insulator Platform for Polymer Waveguide Photonics","authors":"Yuting Zhou;Feiyu Jiao;Pei Zeng;Yansong Du;Yuxuan Liu;Simeng Li;Chonghao Zhang;Jingtong Yao;Yufeng Wang;Jian Song;Xun Guan","doi":"10.1109/LPT.2025.3591131","DOIUrl":"https://doi.org/10.1109/LPT.2025.3591131","url":null,"abstract":"In this letter, we propose, for the first time, a three-dimensional gradient inverse design framework tailored for bound shape optimization on the SU8-on-Insulator (SUOI) platform, enabling efficient exploration of a large parameter space. Performance tolerance analysis through simulation confirms the robustness of the optimized devices against practical fabrication variations. Based on this algorithm, we experimentally demonstrate three key devices for SU-8 polymer waveguide photonics, a waveguide crossing, a Y-branch power splitter, and a compact waveguide bend, each exhibiting low insertion losses, tiny footprints, a wide bandwidth from 1450nm to 1620nm, and excellent agreement between simulation and experimental results. The polymer waveguide devices and the algorithm framework represent a key advancement toward the various device capabilities required for future SUOI photonics, providing solutions for SU8-based photonics integration systems and sensing platforms.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 21","pages":"1217-1220"},"PeriodicalIF":2.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751043","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}
引用次数: 0
Compact and High-Performance Wide-Band Wavelength-Tunable DFB Laser Array Based on REC Technique 基于REC技术的紧凑高性能宽带波长可调谐DFB激光阵列
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-21 DOI: 10.1109/LPT.2025.3591373
Yaqiang Fan;Haolin Xia;Jingxuan Zhang;Yuan Lv;Zhenxing Sun;Wei Yuan;Yuechun Shi;Yan Wang;Pengfei Xu;Xiangfei Chen
{"title":"Compact and High-Performance Wide-Band Wavelength-Tunable DFB Laser Array Based on REC Technique","authors":"Yaqiang Fan;Haolin Xia;Jingxuan Zhang;Yuan Lv;Zhenxing Sun;Wei Yuan;Yuechun Shi;Yan Wang;Pengfei Xu;Xiangfei Chen","doi":"10.1109/LPT.2025.3591373","DOIUrl":"https://doi.org/10.1109/LPT.2025.3591373","url":null,"abstract":"In this letter, we present a design for an ultra-wideband matrix grating distributed feedback (DFB) laser array. 8 lasers are arranged in parallel, with one laser per waveguide to avoid grating crosstalk and reflections from other lasers. By employing the reconstruction-equivalent-chirp technique, precise wavelength control of all 8 lasers is achieved, with a wavelength deviation of ±0.2 nm. The wavelength current tuning range of a single DFB laser can reach up to 6.3 nm, resulting in a total tuning range of up to 50 nm, with a side-mode suppression ratio exceeding 40 dB. Following amplification by the semiconductor optical amplifier, the laser achieves an output power exceeding 40 mW with a relative intensity noise below −130 dB/Hz. The array demonstrates rapid wavelength switching with a switching time of less than <inline-formula> <tex-math>$450~mu $ </tex-math></inline-formula>s, highlighting its application potential in optical communication systems and optical sensing systems.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 21","pages":"1233-1236"},"PeriodicalIF":2.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751044","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}
引用次数: 0
Widely Tunable Coupled Mid-IR Diode Lasers With Side Mode Suppression Ratio Above 40 dB 宽可调谐耦合中红外二极管激光器，侧模抑制比在40db以上
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-21 DOI: 10.1109/LPT.2025.3591079
Thanh-Nam Tran;Saroj Kumar Patra;Magnus Breivik;Bjørn-Ove Fimland
{"title":"Widely Tunable Coupled Mid-IR Diode Lasers With Side Mode Suppression Ratio Above 40 dB","authors":"Thanh-Nam Tran;Saroj Kumar Patra;Magnus Breivik;Bjørn-Ove Fimland","doi":"10.1109/LPT.2025.3591079","DOIUrl":"https://doi.org/10.1109/LPT.2025.3591079","url":null,"abstract":"A novel tunable coupled lasers structure utilizing the Vernier effect and the light coupling mechanism is successfully demonstrated in the wavelength range of 2.35 – <inline-formula> <tex-math>$2.39~mu $ </tex-math></inline-formula>m. The coupling effect between two active S-bend and straight waveguide lasers can enable both a wide tuning range and a very high side mode suppression ratio (SMSR) by choosing an appropriate separation gap between these two lasers. With a separation gap of <inline-formula> <tex-math>$5~mu $ </tex-math></inline-formula>m, a wide tuning range of 40 nm and a stable SMSR of above 40 dB was achieved. Employing a simple structure, this regrowth-free and easily manufactured laser configuration is a highly promising solution for trace-gas sensing applications.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1189-1192"},"PeriodicalIF":2.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716245","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}
引用次数: 0
Capacity Bounds of Range-Limited Visible Light Communications Having Signal-Dependent Noise 具有信号相关噪声的距离受限可见光通信的容量边界
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-18 DOI: 10.1109/LPT.2025.3590408
Jin-Yuan Wang;Ziqi Sun;Danting Zhang;Shuai Dong;Zhizhao Zeng;Na Liu
{"title":"Capacity Bounds of Range-Limited Visible Light Communications Having Signal-Dependent Noise","authors":"Jin-Yuan Wang;Ziqi Sun;Danting Zhang;Shuai Dong;Zhizhao Zeng;Na Liu","doi":"10.1109/LPT.2025.3590408","DOIUrl":"https://doi.org/10.1109/LPT.2025.3590408","url":null,"abstract":"This letter analyzes the channel capacity for range-limited visible light communications having signal-dependent noise. The input signal is constrained by the range-limited constraint and the average optical power constraint. By the variational method, we derive the capacity-infimum-achieving input distribution and a closed-form expression of capacity lower bound. Based on the dual expression of capacity and the principle of “capacity-achieving input distribution that escape to infinity”, we then derive an upper bound on capacity. We have shown that the derived capacity bounds cover most of the existing bounds. Numerical results show that the derived bounds are sufficiently tight. Moreover, the effects of different parameters on capacity performance are also discussed.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1185-1188"},"PeriodicalIF":2.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716246","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}
引用次数: 0
Performance Analysis of Two Color-Coded 8D Modulation Formats in FBMC-VLC System FBMC-VLC系统中两种彩色编码8D调制格式的性能分析
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-18 DOI: 10.1109/LPT.2025.3590511
Jia Lu;Xu Ma;Jie Ma;Jianfei Liu;Xiangye Zeng;Yang Wang
{"title":"Performance Analysis of Two Color-Coded 8D Modulation Formats in FBMC-VLC System","authors":"Jia Lu;Xu Ma;Jie Ma;Jianfei Liu;Xiangye Zeng;Yang Wang","doi":"10.1109/LPT.2025.3590511","DOIUrl":"https://doi.org/10.1109/LPT.2025.3590511","url":null,"abstract":"In this letter, two innovative color-coded eight-dimensional (8D) modulation formats (namely 8D-plane and 8D-stereo) are proposed and experimentally validated in a filter bank multi-carrier based visible light communication (FBMC-VLC) system. The 8D-plane format is formed by combining geometric shell structures in a plane space. In contrast, 8D-stereo format is constructed by combining 3D constellations in a stereoscopic space, which further reduces the design complexity of high-dimensional constellations. Both formats utilize color coding to achieve joint modulation across different dimensions. Symbols with distinct states of polarization are utilized across various dimensions to maximize the minimum Euclidean distance and alleviate nonlinear interference. Experimental results show that in terms of peak-to-peak voltage and bias current, 8D-stereo-FBMC exhibits the broadest operational range compared with 2D-FBMC, 4D-FBMC, and 8D-plane-FBMC. When the BER meets <inline-formula> <tex-math>$3.8times 10^{-3}$ </tex-math></inline-formula>, the proposed 8D-stereo-FBMC scheme has a 0.4 Gbit/s increase in data rate compared to 8D-plane-FBMC, which indicates the remarkable tolerance to nonlinearity.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1209-1212"},"PeriodicalIF":2.5,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725195","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}
引用次数: 0
Full-Duplex Analog Photonic Fronthaul Link With Carrier Reuse at 25 GHz for 5G and beyond 25 GHz载波复用的全双工模拟光子前传链路，用于5G及以后
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-18 DOI: 10.1109/LPT.2025.3590478
J. Mora;J. Bohata;J. Vocilka;B. Ortega;S. Zvánovec
{"title":"Full-Duplex Analog Photonic Fronthaul Link With Carrier Reuse at 25 GHz for 5G and beyond","authors":"J. Mora;J. Bohata;J. Vocilka;B. Ortega;S. Zvánovec","doi":"10.1109/LPT.2025.3590478","DOIUrl":"https://doi.org/10.1109/LPT.2025.3590478","url":null,"abstract":"This letter proposes a full-duplex analog fronthaul seamless transmission system employing wavelength reuse for simultaneous downlink (DL) and uplink (UL) signal data streaming at 25 GHz frequency band. The proposed architecture integrates centralized optical sources at a central office (CO), an optical distribution network (ODN) comprising 10 km of standard single-mode fiber (SSMF) and a 1.9 m long free-space optical (FSO) link, and a remote radio head (RRH) utilizing 1.9 m long wireless radio links. Intensity modulation is used for DL, while phase modulation combined with optical filtering enables efficient carrier reuse and data modulation for UL. The system’s performance is assessed using orthogonal frequency-division multiplexing (OFDM) signals with 64-quadrature amplitude modulation (QAM) and quadrature phase shift keying (QPSK) modulation for DL and UL. Results demonstrate low error vector magnitude (EVM) across various input and received optical power levels, with minimal penalties from fiber dispersion and bidirectional reflections. The study also evaluates the impact of nonlinearities, phase noise, and intermodulation distortions, showcasing the system’s robustness. This scalable, efficient solution advances full-duplex optical fronthaul networks and supports millimeter-wave (mmW) applications beyond 25 GHz.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1193-1196"},"PeriodicalIF":2.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716203","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}
引用次数: 0
Experimental Demonstration of Longitudinal Power Monitoring Over a Mixed Fiber Link 混合光纤链路纵向功率监测的实验验证
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-17 DOI: 10.1109/LPT.2025.3590274
Dario Pilori;Stefano Straullu;Antonino Nespola;Lorenzo Andrenacci;Stefano Piciaccia;Gabriella Bosco
{"title":"Experimental Demonstration of Longitudinal Power Monitoring Over a Mixed Fiber Link","authors":"Dario Pilori;Stefano Straullu;Antonino Nespola;Lorenzo Andrenacci;Stefano Piciaccia;Gabriella Bosco","doi":"10.1109/LPT.2025.3590274","DOIUrl":"https://doi.org/10.1109/LPT.2025.3590274","url":null,"abstract":"This letter presents an experimental demonstration of the Linear-Least Squares Longitudinal Power Monitoring (LLS-LPM) technique over a mixed fiber link. The link is made by five spans, including four spans of G.652 Single-Mode Fiber (SMF) and one span of G.655 Non-Zero Dispersion-Shifted Fiber (NZDSF) with negative dispersion in the C-band. The study highlights the challenges posed by the negative dispersion of G.655 fiber and its impact on the convergence of the LLS-LPM algorithm. The experimental results demonstrate that the LLS-LPM algorithm can accurately estimate the power profile, only in the link portion where there is a one-to-one relation between the cumulated chromatic dispersion and the distance. This work provides valuable insights into the application of LLS-LPM in real-world fiber networks with mixed fiber types.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1181-1184"},"PeriodicalIF":2.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716284","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}
引用次数: 0
Demonstration of a Thin-Film Lithium Niobate Modulator With Integrated Bias Controllers 集成偏压控制器的铌酸锂薄膜调制器的演示
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-04 DOI: 10.1109/LPT.2025.3585706
Guanbao Zhao;Jiao Zhang;Min Zhu;Luohan Peng;Jinbiao Xiao
{"title":"Demonstration of a Thin-Film Lithium Niobate Modulator With Integrated Bias Controllers","authors":"Guanbao Zhao;Jiao Zhang;Min Zhu;Luohan Peng;Jinbiao Xiao","doi":"10.1109/LPT.2025.3585706","DOIUrl":"https://doi.org/10.1109/LPT.2025.3585706","url":null,"abstract":"To enhance the portability and stability of the thin-film lithium niobate modulator (TFLNM) under different working conditions, an integrated bias controller is proposed and demonstrated based on multi-physics simulation modeling algorithms and heterogeneous integration strategies. A new transmission formula with higher accuracy is enabled according to the integrated device. Theoretical analysis results show the fabricated devices have a bandwidth over 110 GHz. Experimental results show the device can operate stably for 3500 hours online at 110 GHz, with mere 0.01°C phase point drift. Notably, the Transmitter and Dispersion Eye Closure for PAM4 (TDECQ) achieves 1.91 dB. To our knowledge, this is currently the best-performance electro-optic hybrid integrated TFLNM, which is suitable for large-scale network calculation.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1201-1204"},"PeriodicalIF":2.3,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716283","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}
引用次数: 0
CNR Improvement Method for 380-km Ultra-Long-Distance A-RoF Transmission Using FM Conversion 利用调频变换提高380公里超远距A-RoF传输CNR方法
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-03 DOI: 10.1109/LPT.2025.3585642
Ryo Miyatake;Toshiaki Shitaba;Akihiro Tanabe;Youichi Fukada;Kaito Okada;Masayoshi Sekiguchi;Tomoaki Yoshida
{"title":"CNR Improvement Method for 380-km Ultra-Long-Distance A-RoF Transmission Using FM Conversion","authors":"Ryo Miyatake;Toshiaki Shitaba;Akihiro Tanabe;Youichi Fukada;Kaito Okada;Masayoshi Sekiguchi;Tomoaki Yoshida","doi":"10.1109/LPT.2025.3585642","DOIUrl":"https://doi.org/10.1109/LPT.2025.3585642","url":null,"abstract":"Analog radio-over-fiber (A-RoF) transmission has significant advantages such as ultra-low latency, high spectral efficiency, and high compatibility with the analog interface on the receiving side. However, since A-RoF transmits analog signals, the quality is easily degraded during the transmission process, making it difficult to extend the transmission distance and maintain high signal quality. To address this issue, we propose a method to improve the transmission quality by intentionally using non-dispersion-compensated single-mode fibers for the optical transmission network. Transmission experiments clarified that a transmission distance of 380 km was achieved, exceeding the world’s longest broadband A-RoF transmission by 60 km. We also clarified that the improvement in transmission distance is due to an increase in the Optical Modulation Index.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1157-1160"},"PeriodicalIF":2.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641030","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}
引用次数: 0
Microwave Frequency Divider With Tunable Division Factors Based on an Optoelectronic Oscillator 基于光电振荡器的可调分频器
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-03 DOI: 10.1109/LPT.2025.3585525
Liangzun Tang;Shifeng Liu;Li Yang;Zhenzhou Tang;Simin Li;Shilong Pan
{"title":"Microwave Frequency Divider With Tunable Division Factors Based on an Optoelectronic Oscillator","authors":"Liangzun Tang;Shifeng Liu;Li Yang;Zhenzhou Tang;Simin Li;Shilong Pan","doi":"10.1109/LPT.2025.3585525","DOIUrl":"https://doi.org/10.1109/LPT.2025.3585525","url":null,"abstract":"A wideband microwave regenerative frequency divider with tunable division factors is proposed and experimentally demonstrated based on harmonic mixing in an optoelectronic oscillator. In the optoelectronic oscillation cavity, a phase modulator is cascaded with an optical filter to achieve equivalent intensity modulation by preserving the single sideband. Harmonic mixing procedure occurs between the <inline-formula> <tex-math>$+ 1^{mathrm {st}}$ </tex-math></inline-formula>-order sideband of the input signal and the higher-order sideband of the oscillation signal within the following photodetector. When the intermediate frequency generated by the harmonic mixing procedure matches the oscillation frequency, and the loop phase and gain conditions are satisfied, microwave regenerative frequency division can be achieved. The frequency division factor is determined by the order of the optical sideband of the oscillation signal during the harmonic mixing and can be adjusted using a two-tap microwave filter constructed with a phase shifter on each arm. Experimental results show that a microwave regenerative frequency divider with an operating frequency range of 22 to 30 GHz and division factors varying from 2 to 8 was successfully realized.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 19","pages":"1133-1136"},"PeriodicalIF":2.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597766","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}
引用次数: 0
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