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Compact Multifunctional CWDM Arrayed Waveguide Grating Router Cascaded With Optical Switches 与光开关级联的紧凑多功能CWDM阵列波导光栅路由器
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-21 DOI: 10.1109/LPT.2025.3553693
Shuojian Zhang;Zikang Xu;Zhuping Fan;Rui Yang;Yangbo Wu;Guocai Song;Jiahui Yu;Junqiang Zhu;Jiasheng Zhao;Jian-Jun He
{"title":"Compact Multifunctional CWDM Arrayed Waveguide Grating Router Cascaded With Optical Switches","authors":"Shuojian Zhang;Zikang Xu;Zhuping Fan;Rui Yang;Yangbo Wu;Guocai Song;Jiahui Yu;Junqiang Zhu;Jiasheng Zhao;Jian-Jun He","doi":"10.1109/LPT.2025.3553693","DOIUrl":"https://doi.org/10.1109/LPT.2025.3553693","url":null,"abstract":"We present a silica-based bidirectional arrayed waveguide grating router (AWGR) chip with cascaded optical switches intended for coarse wavelength-division-multiplexing (CWDM) applications. It performs multiple functions including multi/demultiplexing, switching and wavelength routing within a compact chip size. For uplink signal, we achieved a 1 dB optical bandwidth of more than 15 nm while for downlink signal, a 3 dB optical bandwidth of 12 nm was attained. The cascaded extinction ratios of optical switches are all above 30 dB across a large wavelength range. The results demonstrate its promising potential for flexible and cost-effective CWDM systems.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 9","pages":"504-507"},"PeriodicalIF":2.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818023","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
Fiber Bragg Grating-Based Sensing System for Non-Destructive Root Phenotyping With ResNet Prediction 基于光纤Bragg光栅的无损根系表型传感系统与ResNet预测
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-21 DOI: 10.1109/LPT.2025.3553701
Steven Binder;Kabir Hossain;Alexander Bucksch;Mable Fok
{"title":"Fiber Bragg Grating-Based Sensing System for Non-Destructive Root Phenotyping With ResNet Prediction","authors":"Steven Binder;Kabir Hossain;Alexander Bucksch;Mable Fok","doi":"10.1109/LPT.2025.3553701","DOIUrl":"https://doi.org/10.1109/LPT.2025.3553701","url":null,"abstract":"Real-time measurements of crop root architecture can overcome limitations faced by plant breeders when developing climate-resilient plants. Due to current measurement methods failing to continuously monitor root growth in a non-destructive and scalable fashion, we propose a first in-soil sensing system based on fiber Bragg gratings (FBG). The sensing system logs three-dimensional strain generated by a growing pseudo-root. Two ResNet models confirm the utility of in-soil FBG sensors by predicting pseudo-root width and depth with accuracies of 92% and 93%, respectively. To analyze model robustness, a preliminary experiment was performed where FBGs logged strain generated from a corn plant’s roots for 30 days. The models were then retrained on new data where they achieved accuracies of 98% and 96%, respectively. Our presented prototype has potential prospects to go beyond measuring root parameters and sense its surrounding soil environment.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 8","pages":"473-476"},"PeriodicalIF":2.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792847","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
Narrow Bandwidth Fiber Laser Based on Carbon Nanotubes and Saturable Dynamic Induced Grating 基于碳纳米管和可饱和动态诱导光栅的窄带宽光纤激光器
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-20 DOI: 10.1109/LPT.2025.3553197
Mengli Li;Wei Geng;Hongcheng Ni;Yuangang Lu
{"title":"Narrow Bandwidth Fiber Laser Based on Carbon Nanotubes and Saturable Dynamic Induced Grating","authors":"Mengli Li;Wei Geng;Hongcheng Ni;Yuangang Lu","doi":"10.1109/LPT.2025.3553197","DOIUrl":"https://doi.org/10.1109/LPT.2025.3553197","url":null,"abstract":"Narrow bandwidth mode-locked lasers serve as crucial light sources in many application domains such as spectroscopy and molecular excitation. In this Letter, we propose and experimentally demonstrate a novel narrow bandwidth mode-locked fiber laser by innovatively combining carbon nanotubes (CNTs) with saturable dynamic induced gratings (SDIGs) to achieve narrow bandwidth laser output. This mode-locked laser demonstrates outstanding performance, particularly in its capacity to achieve laser output with an extremely narrow spectral bandwidth of approximately 22.4 pm at half-maximum full width and a pulse sequence interval of 105.4 ns at a low pump threshold of 35 mW. Such characteristics endow this laser with significant advantages in a wide range of applications.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 8","pages":"493-496"},"PeriodicalIF":2.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817838","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
Enhanced Operation Range of Silicon MZI Filters Using a Broadband Bent Directional Coupler 使用宽带弯曲定向耦合器增强硅MZI滤波器的工作范围
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-19 DOI: 10.1109/LPT.2025.3553059
Ahmed Bayoumi;Mehmet Oktay;Alaa Elshazly;Hakim Kobbi;Rafal Magdziak;Guy Lepage;Chiara Marchese;Javad Rahimi Vaskasi;Swetanshu Bipul;Dieter Bode;Dimitrios Velenis;Maumita Chakrabarti;Peter Verheyen;Philippe Absil;Filippo Ferraro;Yoojin Ban;Joris Van Campenhout;Wim Bogaerts;Qingzhong Deng
{"title":"Enhanced Operation Range of Silicon MZI Filters Using a Broadband Bent Directional Coupler","authors":"Ahmed Bayoumi;Mehmet Oktay;Alaa Elshazly;Hakim Kobbi;Rafal Magdziak;Guy Lepage;Chiara Marchese;Javad Rahimi Vaskasi;Swetanshu Bipul;Dieter Bode;Dimitrios Velenis;Maumita Chakrabarti;Peter Verheyen;Philippe Absil;Filippo Ferraro;Yoojin Ban;Joris Van Campenhout;Wim Bogaerts;Qingzhong Deng","doi":"10.1109/LPT.2025.3553059","DOIUrl":"https://doi.org/10.1109/LPT.2025.3553059","url":null,"abstract":"Mach-Zehnder interferometers (MZIs) are essential components that are used in a variety of wavelength division multiplexing (WDM) systems. Wavelength-sensitive straight directional couplers (DCs) are usually used as the beam splitter and combiner in traditional waveguide-based MZIs, which often limit the operational bandwidth and cause additional insertion loss. To overcome these challenges, we present an MZI based on bent DCs achieving <inline-formula> <tex-math>$2.7times $ </tex-math></inline-formula> increase in operational wavelength range, expanding the bandwidth from 36.7 nm in straight DC-based MZIs to at least 100 nm, while maintaining a large extinction ratio (ER) <inline-formula> <tex-math>$mathrm {geq 18.4~dB}$ </tex-math></inline-formula>. The proposed MZI is robust across a 300 mm wafer, achieving minimum ER over 100 nm wavelength range of <inline-formula> <tex-math>${mathrm {14.3 }}sim {mathrm {18.4~dB}}$ </tex-math></inline-formula> in all the 63 measured dies, significantly outperforming MZIs based on straight DCs, which exhibit minimum ER of <inline-formula> <tex-math>${mathrm {4.2~ }}sim {mathrm {6.1~dB}}$ </tex-math></inline-formula>. Finally, the proposed MZI is theoretically proven to be highly efficient for more complex WDM systems. Transfer matrix method calculations for 16 −channel MZI-based WDM system demonstrate an improvement of the worst-channel isolation from 5.42 dB to 17.18 dB and the average insertion loss from 1.02 dB to 0.30 dB, as compared to the straight DC based counterpart. This underscores the potential of the proposed MZI to enable scalable and high-performance WDM systems.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 9","pages":"500-503"},"PeriodicalIF":2.3,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817892","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
10-Gb/s NRZ Per Lane Data Links With Transferred Micro-LEDs With Record BER and Energy Efficiency 10 gb /s NRZ每车道数据链路与传输的微型led具有记录的误码率和能源效率
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-18 DOI: 10.1109/LPT.2025.3552708
Bardia Pezeshki;Alex Tselikov;Rob Kalman;Suresh Rangarajan;Ivan Huang;Jeff Pepper;Sarah Zou;Howard Rourke;Rowan Pocock;Alasdair Fikouras
{"title":"10-Gb/s NRZ Per Lane Data Links With Transferred Micro-LEDs With Record BER and Energy Efficiency","authors":"Bardia Pezeshki;Alex Tselikov;Rob Kalman;Suresh Rangarajan;Ivan Huang;Jeff Pepper;Sarah Zou;Howard Rourke;Rowan Pocock;Alasdair Fikouras","doi":"10.1109/LPT.2025.3552708","DOIUrl":"https://doi.org/10.1109/LPT.2025.3552708","url":null,"abstract":"We demonstrate the highest data rate links using NRZ modulation of a transferred LED. LEDs transferred onto a sapphire backplane driven by a high-speed external source are modulated at 10Gb/s NRZ for a total extrapolated bandwidth of about 3Tb/s. The transmitters consume ~1pJ/bit with a <inline-formula> <tex-math>$10^{-10}$ </tex-math></inline-formula> BER. Arrays of ~300 GaN microLEDs transferred onto a Si backplane with integrated drivers are modulated at 3.5 Gb/s for a total bandwidth of ~1Tb/s. Such highly parallel optical interconnects have the potential to greatly improve the power consumption and density of chip-to-chip communications.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 8","pages":"453-456"},"PeriodicalIF":2.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740301","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
High-Sensitivity Optical Fiber Mach-Zehnder Interferometer Sensor Based on Eight-Core Fiber 基于八芯光纤的高灵敏度光纤马赫-泽恩德干涉仪传感器
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-18 DOI: 10.1109/LPT.2025.3552119
Yancheng Ji;Junjie Wang;Jiayi Qian;Yan Wang;Hai Liu;Juan Cao;Dan Sun;Yuechun Shi;Yongjie Yang;Xiaojun Zhu;Wuming Wu
{"title":"High-Sensitivity Optical Fiber Mach-Zehnder Interferometer Sensor Based on Eight-Core Fiber","authors":"Yancheng Ji;Junjie Wang;Jiayi Qian;Yan Wang;Hai Liu;Juan Cao;Dan Sun;Yuechun Shi;Yongjie Yang;Xiaojun Zhu;Wuming Wu","doi":"10.1109/LPT.2025.3552119","DOIUrl":"https://doi.org/10.1109/LPT.2025.3552119","url":null,"abstract":"A high-sensitivity optical fiber curvature sensor based on eight-core fiber (ECF) is proposed and demonstrated. The sensor is fabricated by directly fusing a segment of ECF between two single-mode fibers (SMFs), forming a Mach-Zehnder interferometer (MZI) in an SMF-ECF-SMF structure. Due to the mode field mismatch between ECF and SMF modes, the fundamental mode of SMF is excited to higher-order modes and coupled into ECF to detect the external environment. The cores of the ECF present a <inline-formula> <tex-math>$2times 4$ </tex-math></inline-formula> arrangement, which can play the role of multipath MZI due to the existence of multiple cores. In the curvature detection, the maximum curvature sensitivity of the sensor can be up to −53.32 dB/m−1 within the curvature range of 0.3006 m−1–0.5483 m−1. A wavelength dip with a maximum extinction ratio of 22 dB is obtained in the transmission spectrum, which indicates that the ECF effectively equalizes light energy. In addition, the strain response is also measured. When the strain range changes from 0 to <inline-formula> <tex-math>$900~mu varepsilon $ </tex-math></inline-formula>, the maximum strain sensitivity is −1.83 pm/<inline-formula> <tex-math>$mu varepsilon $ </tex-math></inline-formula>. The proposed sensor, with high sensitivity, simple structure, and good repeatability, has potential applications in many fields, such as medical devices and aerospace.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 8","pages":"445-448"},"PeriodicalIF":2.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698323","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
226.875-Gbit/s 4-PAM Operation of High-Output Power AXEL Chip on Carrier (CoC) 226.875 gbit /s高输出功率AXEL芯片在载波（CoC）上的4-PAM操作
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-18 DOI: 10.1109/LPT.2025.3552120
S. Kanazawa;N. Watanabe;M. Chen;T. Shindo;W. Kobayashi;Y. Nakanishi;M. Usui;K. Hadama;H. Nakamura
{"title":"226.875-Gbit/s 4-PAM Operation of High-Output Power AXEL Chip on Carrier (CoC)","authors":"S. Kanazawa;N. Watanabe;M. Chen;T. Shindo;W. Kobayashi;Y. Nakanishi;M. Usui;K. Hadama;H. Nakamura","doi":"10.1109/LPT.2025.3552120","DOIUrl":"https://doi.org/10.1109/LPT.2025.3552120","url":null,"abstract":"In this work, we propose a wire interconnection AXEL CoC designed to increase the modulation bandwidth for 200-Gbit/s/<inline-formula> <tex-math>$lambda $ </tex-math></inline-formula> operation and simplify the CoC fabrication process. We first developed an electro-absorption modulator (EAM) that maintains a balance between the extinction ratio and the modulation bandwidth, and then, to increase the modulation bandwidth, we designed a termination circuit that can be integrated with the EAM and the CoC to reduce the bonding wire length. We obtained simulated 3-dB bandwidths of over 80 GHz and over 98 GHz with the longest and shortest bonding wire lengths, respectively. The 3-dB bandwidth of the AXEL CoC was over 95 GHz, which is enough for 226-Gbit/s/<inline-formula> <tex-math>$lambda $ </tex-math></inline-formula> operation. Moreover, under 226.875 Gbit/s 4-PAM operation, the average output power exceeded +9.0 dBm thanks to the integrated SOA in the chip.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 8","pages":"481-484"},"PeriodicalIF":2.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800772","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
IEEE Photonics Technology Letters publication information IEEE Photonics Technology Letters出版信息
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-17 DOI: 10.1109/LPT.2025.3539144
{"title":"IEEE Photonics Technology Letters publication information","authors":"","doi":"10.1109/LPT.2025.3539144","DOIUrl":"https://doi.org/10.1109/LPT.2025.3539144","url":null,"abstract":"","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"C2-C2"},"PeriodicalIF":2.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10929790","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing the Output Power of 308 nm UVB-LED by Strain Modulation Through Mg Incorporation in AlN AlN掺入Mg应变调制提高308 nm UVB-LED输出功率
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-17 DOI: 10.1109/LPT.2025.3552106
Hongyu Liu;Mingyue Lou;Qiushuang Chen;Hansong Geng;Shengli Qi;Wei Guo;Jichun Ye
{"title":"Enhancing the Output Power of 308 nm UVB-LED by Strain Modulation Through Mg Incorporation in AlN","authors":"Hongyu Liu;Mingyue Lou;Qiushuang Chen;Hansong Geng;Shengli Qi;Wei Guo;Jichun Ye","doi":"10.1109/LPT.2025.3552106","DOIUrl":"https://doi.org/10.1109/LPT.2025.3552106","url":null,"abstract":"Ultraviolet light-emitting-diodes (UV-LEDs) encounter substantial challenges in enhancing output power due to significant lattice mismatches between the n-type contact layer and underlying AlN template. In this study, a strain-modulated UVB-LED is proposed through Mg incorporation on top of the AlN layer. Mg incorporation effectively expands the lattice constant of the top layer of AlN, reducing the lattice mismatch between AlN and AlGaN. The density of the screw-type dislocations in the n-AlGaN layer was reduced from <inline-formula> <tex-math>$1.41times 10^{8}$ </tex-math></inline-formula> to <inline-formula> <tex-math>$9.22times 10 ^{7}$ </tex-math></inline-formula>cm−2. The fabricated 308 nm-emission UVB-LED with Mg incorporation in AlN exhibits 13.6% higher light output power and reduced operation voltage compared to LED without Mg incorporation. This work provides a promising solution towards the development of high-efficiency UVB light emitters.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 8","pages":"449-452"},"PeriodicalIF":2.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740163","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
IEEE Photonics Technology Letters Information for Authors IEEE Photonics Technology Letters for Authors
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-03-17 DOI: 10.1109/LPT.2025.3539150
{"title":"IEEE Photonics Technology Letters Information for Authors","authors":"","doi":"10.1109/LPT.2025.3539150","DOIUrl":"https://doi.org/10.1109/LPT.2025.3539150","url":null,"abstract":"","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"C3-C3"},"PeriodicalIF":2.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930236","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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