Sunil Mohan;Fatima Banoo;Manish Singh Negi;Debabrata Paul
{"title":"LSPR-Based Optical Fiber Sensor Utilizing GO-ZnO Nanocomposite for Relative Humidity Measurement","authors":"Sunil Mohan;Fatima Banoo;Manish Singh Negi;Debabrata Paul","doi":"10.1109/LPT.2024.3520207","DOIUrl":"https://doi.org/10.1109/LPT.2024.3520207","url":null,"abstract":"This letter describes the development and characterization of a novel optical fiber relative humidity (RH) sensor leveraging Localized Surface Plasmon Resonance (LSPR). The sensor utilizes an in-house synthesized GO-ZnO nanocomposite (NC)-doped silica film coated on gold nanoparticle coated U-bend plastic-clad silica (PCS) fiber. It shows a linear response across a broad RH range of 15-90%, with a sensitivity of 0.1359 nm/%RH, and features rapid response and recovery times of 5s and 7s. The sensor’s response is fully reversible and repeatable.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"145-148"},"PeriodicalIF":2.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912521","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":"Shortwave Infrared Electro-Optic Frequency Combs Generation Based on Wideband Parametric Conversion","authors":"Weiyu Dai;Tongtong Xie;Shiwei Liu;Hongyan Fu;Jiahui Lin;Daru Chen","doi":"10.1109/LPT.2024.3520246","DOIUrl":"https://doi.org/10.1109/LPT.2024.3520246","url":null,"abstract":"An all-fiber short-wave infrared electro-optic frequency combs (SWIR E-O combs) based on parametric amplification is proposed and experimentally demonstrated by converting the near-infrared combs into the shortwave infrared region. The SWIR E-O combs shows tunable central wavelength and spectral line spacing. Based on the simple combination of the fiber optical parametric amplifier and the Thulium-doped fiber amplifier directly pumped by C-band E-O combs, the power of SWIR E-O combs has been effectively enhanced. In addition, a section of single-mode fiber is used for pulse compression of the C-band E-O combs, and the 10 dB spectral width of the SWIR E-O combs is 17.81nm. The proposed SWIR combs with repetition rates of tens of GHz is of high interest for coherent communication and gas sensing in the SWIR region.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"149-152"},"PeriodicalIF":2.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905714","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}
Linan Shan;Xiaoguang Zhang;Wanxin Zhao;Lixia Xi;Hu Zhang;Xiaosheng Xiao;Nan Cui
{"title":"SOP Monitoring Using Time-Frequency Feature Extraction of the Polarization Tributary Powers","authors":"Linan Shan;Xiaoguang Zhang;Wanxin Zhao;Lixia Xi;Hu Zhang;Xiaosheng Xiao;Nan Cui","doi":"10.1109/LPT.2024.3519552","DOIUrl":"https://doi.org/10.1109/LPT.2024.3519552","url":null,"abstract":"This letter proposes a comprehensive method to monitor the change speed of the state of polarization (SOP) for optical transmission systems. By using time-frequency feature extraction of the polarization tributary powers. The proposed method can be implemented either in the receiver digital signal processor (DSP) without using the MIMO module or at any fiber span nodes with simple hardware. It was validated in a 2000 km fiber link and can monitor within or exceeding 20 Mrad/s SOP change speed.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"157-160"},"PeriodicalIF":2.3,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142918530","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}
Shangtong Han;Dongyue Sun;Shi Zhao;Daoxin Dai;Yaocheng Shi
{"title":"Ultra-Broadband Power Splitter With Arbitrary Splitting Ratio Based on SWG MMI Coupler","authors":"Shangtong Han;Dongyue Sun;Shi Zhao;Daoxin Dai;Yaocheng Shi","doi":"10.1109/LPT.2024.3519299","DOIUrl":"https://doi.org/10.1109/LPT.2024.3519299","url":null,"abstract":"We propose and demonstrate an ultra-broadband power splitter with arbitrary splitting ratio based on subwavelength gratings (SWGs) multimode interference (MMI) coupler. SWGs are introduced to increase the optical bandwidth of the devices. Asymmetrical MMI regions are used to realize the arbitrary splitting ratio. We have demonstrated the realization of the low loss power splitters with the splitting ratio of 4:6 and 2:8. The measured results for the fabricated devices show that, for both 4:6 and 2:8 devices, loss less than 1.5 dB and splitting ratio variation less than 10% are achieved within a broad optical bandwidth from \u0000<inline-formula> <tex-math>$1.26~mu $ </tex-math></inline-formula>\u0000m to \u0000<inline-formula> <tex-math>$1.6~mu $ </tex-math></inline-formula>\u0000m.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"137-140"},"PeriodicalIF":2.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905820","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":"Optoelectronic Demonstration of the Nonlinear Activation Module for Optical Neural Networks","authors":"Yubin Zang;Simin Li;Boyu Hua;Zhipeng Lin;Fangzheng Zhang;Zuxing Zhang","doi":"10.1109/LPT.2024.3517159","DOIUrl":"https://doi.org/10.1109/LPT.2024.3517159","url":null,"abstract":"In this letter, we experimentally demonstrated the viability of the optoelectronic nonlinear activation module in optical neural networks. By adopting the beam splitter, photo-diode, electronic processing unit and tunable attenuator, nonlinear activation function ReLU which is widely used in the state of the art neural networks can be implemented in an optoelectronic way. Compared with other optical and optoelectronic implementations of nonlinear activation function, this method has advantages in expanses and complexity. This method also has potential to be applied into multiple types of optical neural networks to further increase the prediction accuracy.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 2","pages":"109-112"},"PeriodicalIF":2.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142858989","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}