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1.3-μm 4×25-Gb/s hybrid integrated TOSA and ROSA Special Feature on Optoelectronic Devices and Inte

Yu LIU, Hao-tian BAO, Yi-ming ZHANG, Zhi-ke ZHANG, Yun-shan ZHANG, Xiang-fei CHEN, Jun LU, Yue-chun SHI

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4,   Pages 490-497 doi: 10.1631/FITEE.1800371

Abstract: The design of TOSA and ROSA is employed using a silica-based arrayed waveguide grating chip to select

Keywords： Reconstruction equivalent chirp     Arrayed waveguide grating     Transmitter optical subassembly     Hybrid integrated    

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Monitoring corrosion of reinforcement in concrete structures via fiber Bragg grating sensors

Zhupeng ZHENG, Xiaoning SUN, Ying LEI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 316-319 doi: 10.1007/s11465-009-0040-y

Abstract: In this paper, using fiber Bragg grating (FBG), a corrosion sensor for monitoring steel rebars embedded

Keywords： fiber Bragg grating (FBG)     corrosion     concrete structures     accelerated corrosion test    

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Numerical investigation and optimal design of fiber Bragg grating based wind pressure sensor

Xiangjie WANG, Danhui DAN, Rong XIAO, Xingfei YAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 286-292 doi: 10.1007/s11709-017-0415-9

Abstract: A wind pressure sensor based on fiber Bragg grating (FBG) for engineering structure was investigated

Keywords： wind pressure measurement     wind pressure sensor     fiber Bragg grating     optimal design    

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Ag/PMMA hollow waveguide for solar energy transmission

He LAN, Jianjun HAN, Hongping CHEN, Xiujian ZHAO

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 303-307 doi: 10.1007/s11705-010-0565-y

Abstract: This paper describes an elaborate study on obtaining Ag/PMMA (polymethyl methacrylate) leaky hollow waveguideThrough analyses and comparison, a quartz capillary with the inner diameter of 2 mm was chosen as hollow waveguidesimilar spectrum as the sunlight to test and analyze the performance of the Ag/PMMA leakage hollow waveguideMeanwhile, the Ag/PMMA leaky-type hollow waveguide in this work had good qualities.

Keywords： hollow waveguide     transmit the solar energy     Ag/PMMA multiple film     parabolic collector    

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Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating

Zude ZHOU, Desheng JIANG, Quan LIU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 5-14 doi: 10.1007/s11465-009-0011-3

Abstract: This paper introduces fiber Bragg grating (FBG) based on a fiber optic grating sensor developed to be

Keywords： fiber Bragg grating sensor (FBGS)     mechanical equipment operation safety     embedded technology     high-speed    

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Synthesized All-Pass Waveguide for Ultrafast Electronics Article

Desong Wang,Ke Wu

Engineering 2023, Volume 30, Issue 11,   Pages 49-54 doi: 10.1016/j.eng.2023.04.005

Abstract: This requires a transmission line or waveguide that exhibits an all-pass frequency behavior for the transmittedHerein, we present a synthesized all-pass waveguide that demonstrates record guided-wave controllingThis waveguide technology is an important breakthrough in the evolution of ultrafast electronics, providing

Keywords： All-pass waveguide     Ultrashort pulse     Picosecond transmission     Ultrafast electronics     Terahertz technology    

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Crack detection for wading-concrete structures using water irrigation and electric heating

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 368-377 doi: 10.1007/s11709-022-0926-x

Abstract: Cracking in wading-concrete structures has a worse impact on structural safety compared with conventional concrete structures. The accurate and timely monitoring of crack development plays a significant role in the safety of wading-concrete engineering. The heat-transfer rate near a crack is related to the flow velocity of the fluid in the crack. Based on this, a novel crack-identification method for underwater concrete structures is presented. This method uses water irrigation to generate seepage at the interface of a crack; then, the heat-dissipation rate in the crack area will increase because of the convective heat-transfer effect near the crack. Crack information can be identified by monitoring the cooling law and leakage flow near cracks. The proposed mobile crack-monitoring system consists of a heating system, temperature-measurement system, and irrigation system. A series of tests was conducted on a reinforced-concrete beam using this system. The crack-discrimination index ψ was defined, according to the subsection characteristics of the heat-source cooling curve. The effects of the crack width, leakage flow, and relative positions of the heat source and crack on ψ were studied. The results showed that the distribution characteristics of ψ along the monitoring line could accurately locate the crack, but not quantify the crack width. However, the leakage flow is sensitive to the crack width and can be used to identify it.

Keywords： structural health monitoring     underwater concrete structure     fiber Bragg grating     crack detection     temperature    

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Displacement measuring grating interferometer: a review Special Feature on Precision Measurement and Inst

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5,   Pages 631-654 doi: 10.1631/FITEE.1800708

Abstract:

A grating interferometer, called the “optical encoder,” is a commonly used tool for precise displacementIn contrast to a laser interferometer, a grating interferometer is insensitive to the air refractiveClassified based on the measuring principle and optical configuration, a grating interferometer experiencesCompared with the former two, the spatially separated heterodyne grating interferometer could achieveThe development of incremental displacement measuring grating interferometers achieved in recent years

Keywords： Grating interferometer     Optical encoder     Displacement measurement     Precision measurement    

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Chip-based waveguides for high-sensitivity biosensing and super-resolution imaging Review Articles

Chen-lei Pang, Xu Liu, Wei Chen, Qing Yang,qingyang@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 8,   Pages 1134-1149 doi: 10.1631/FITEE.1900211

Abstract: In this review, we introduce some chip-based waveguide biosensing and imaging techniques, which significantly

Keywords： Waveguide-based sensing     Waveguide-based imaging     Evanescent illumination     Frequency shifting and stitching    

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Compact millimeter-wave air-filled substrate-integrated waveguide crossover employing homogeneous cylindrical

耿淳,连继伟,丁大志

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 9,   Pages 1366-1374 doi: 10.1631/FITEE.2200454

Abstract: 提出一种利用嵌入式均匀柱面透镜设计交叉电桥的新方法。与传统交叉电桥设计相比，该方法在空气填充的基片集成波导交叉腔内引入一个均匀柱面透镜，将入射波导向指定方向。根据射线追踪法，引入的均匀柱面透镜可以在不提高加工复杂度和面积的前提下，有效束缚从输入端传输到输出端的电磁波。详细阐述了该方法的工作机理，并通过电场分布进一步予以验证。利用空气填充基片集成波导技术，研制了工作在毫米波频段的二、三、四通道交叉电桥，验证了所提方法的可行性。同时引入过渡结构，便于实验测量。研究发现二、三、四通道空气填充基片集成波导交叉电桥仿真带宽分别为33%、14%和10%，其核心尺寸分别为0.74,λ,×0.74,λ,、1.43,λ,×1.43,λ,和1.90,λ,×1.90,λ,。最后，为进一步阐述本文方法的优势，将其与公开文献中的类似方法进行了比较。
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A digital moiré fringe method for displacement sensors Article

Jian WU,Ting-ting ZHOU,Bo YUAN,Li-qiang WANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 9,   Pages 946-953 doi: 10.1631/FITEE.1500270

Abstract: The method is formed by only one grating with a constant pitch.First, the magnified grating image is received by an imaging array and is sent to a computer.Then, the digital moiré fringes are generated by overlaying the grating image with its mirrored one.This method has the effects of amplifying displacement and averaging the grating lines error, the same

Keywords： Digital moiré     fringe     Displacement measurement     Grating    

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A general method of designing phase-shifting algorithms for grating lateral shearing interferometry None

Chao FANG, Yang XIANG, Ke-qi QI

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 6,   Pages 809-814 doi: 10.1631/FITEE.1601692

Abstract: We propose a general method of designing phase-shifting algorithms for grating lateral shearing interferometryWe derive a general expression of the phase-shifting algorithm in grating lateral shearing interferometer

Keywords： Interferometry     Phase measurement     Phase-shifting algorithms    

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Corrugated steel pipe culvert applying in highway and strain measuring with fiber grating test technology

Cheng Gang,Fang Ping

Strategic Study of CAE 2013, Volume 15, Issue 8,   Pages 108-112

Abstract: strain conditions of corrugated steel pipe culvert under different soil fill heights, the fiber Bragg grating

Keywords： corrugated steel pipe culvert     highway     soft foundation     field test     fiber test    

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Electrically tunable liquid crystal coplanar waveguide stepped-impedance resonator Research Articles

Xingye Fan, Ruozhou Li, Jing Yan, Yuming Fang, Ying Yu,jing.yan@njupt.edu.cn,ying_yu_001@163.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 9,   Pages 1270-1276 doi: 10.1631/FITEE.2000278

Abstract: A tunable stepped-impedance resonator using is demonstrated. Two resonant frequencies at 3.367 and 7.198 GHz are realized and can be continuously tuned by external applied voltages. Continuous tunable ranges of 52 and 210 MHz have been achieved at a particularly low driving voltage of 14 V, which shows good agreement with the simulation results. The voltage-induced hysteresis phenomenon is also investigated. This device also has a low insertion loss of −2.9 and −4 dB for the two resonant frequencies and the return losses are less than −21.5 dB. This work provides a new protocol to realize a tunable frequency for communication systems.

Keywords： 可调阶梯阻抗谐振器；液晶；共面波导    

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Fused-like angles: replacement for roll-pitch-yaw angles for a six-degree-of-freedom grating interferometer Research Article

Di Chang, Pengcheng Hu, Jiubin Tan,di.chang@hit.edu.cn,hupc@hit.edu.cn,jbtan@hit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 12,   Pages 1551-1684 doi: 10.1631/FITEE.2000432

Abstract: The errors increase as the tip and tilt angles of the grating increase.The are error-free, so they are more in line with the definitions in grating interferometry and more

Keywords： 无偏溯源角；光栅干涉仪；六自由度测量；角度表达方法    

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Title Author Date Type Operation

1.3-μm 4×25-Gb/s hybrid integrated TOSA and ROSA

Yu LIU, Hao-tian BAO, Yi-ming ZHANG, Zhi-ke ZHANG, Yun-shan ZHANG, Xiang-fei CHEN, Jun LU, Yue-chun SHI

Journal Article

Monitoring corrosion of reinforcement in concrete structures via fiber Bragg grating sensors

Zhupeng ZHENG, Xiaoning SUN, Ying LEI

Journal Article

Numerical investigation and optimal design of fiber Bragg grating based wind pressure sensor

Xiangjie WANG, Danhui DAN, Rong XIAO, Xingfei YAN

Journal Article

Ag/PMMA hollow waveguide for solar energy transmission

He LAN, Jianjun HAN, Hongping CHEN, Xiujian ZHAO

Journal Article

Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating

Zude ZHOU, Desheng JIANG, Quan LIU

Journal Article

Synthesized All-Pass Waveguide for Ultrafast Electronics

Desong Wang,Ke Wu

Journal Article

Crack detection for wading-concrete structures using water irrigation and electric heating

Journal Article

Displacement measuring grating interferometer: a review

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Journal Article

Chip-based waveguides for high-sensitivity biosensing and super-resolution imaging

Chen-lei Pang, Xu Liu, Wei Chen, Qing Yang,qingyang@zju.edu.cn

Journal Article

Compact millimeter-wave air-filled substrate-integrated waveguide crossover employing homogeneous cylindrical

耿淳,连继伟,丁大志

Journal Article

A digital moiré fringe method for displacement sensors

Jian WU,Ting-ting ZHOU,Bo YUAN,Li-qiang WANG

Journal Article

A general method of designing phase-shifting algorithms for grating lateral shearing interferometry

Chao FANG, Yang XIANG, Ke-qi QI

Journal Article

Corrugated steel pipe culvert applying in highway and strain measuring with fiber grating test technology

Cheng Gang,Fang Ping

Journal Article

Electrically tunable liquid crystal coplanar waveguide stepped-impedance resonator

Xingye Fan, Ruozhou Li, Jing Yan, Yuming Fang, Ying Yu,jing.yan@njupt.edu.cn,ying_yu_001@163.com

Journal Article

Fused-like angles: replacement for roll-pitch-yaw angles for a six-degree-of-freedom grating interferometer

Di Chang, Pengcheng Hu, Jiubin Tan,di.chang@hit.edu.cn,hupc@hit.edu.cn,jbtan@hit.edu.cn

Journal Article