Results 11 to 20 of about 118 (95)

Sensitivity Analysis of Sidelobes of the Lowest Order Cladding Mode of Long Period Fiber Gratings at Turn Around Point

Sensors, 2022
A new methodology to enhance the sensitivity of a long period fiber grating sensor (LPFG) at the Turn Around Point (TAP) is here presented. The LPFG sensor has been fabricated by etching the fiber up to 20.4 µm, until the sidelobes of dispersed LP0,2 ...
Tanoy Kumar Dey, Sara Tombelli, Arpan Roy, Palas Biswas, Ambra Giannetti, Nandini Basumallick, Francesco Baldini, Somnath Bandyopadhyay, Cosimo Trono   +8 more
doaj   +1 more source

Chemical Sensors Based on Graphene and 2D Graphene Analogs

Advanced Sensor Research, Volume 2, Issue 9, September, 2023., 2023
2D materials have been arisen to substitute the existing materials such as organic, polymeric, metal oxide in chemical sensor usage. The history and recent advances of various 2D material‐based chemical sensors with a description of perspectives and future challenges are introduced.
Chung Won Lee, Tae Hoon Eom, Sung Hwan Cho, Ho Won Jang   +3 more
wiley   +1 more source

Microfiber evanescent‐field photothermal gas detection using acoustic‐induced mode‐dependent frequency shift

Nanophotonics, Volume 12, Issue 16, Page 3229-3242, August 2023., 2023
Abstract In this study, we experimentally showcase the microfiber evanescent‐field photothermal gas detection by exploiting all‐fiber MHz‐level frequency shift scheme. Based on the acousto‐optic interaction effect, the low‐frequency shifts of 0.9 MHz and 1.83 MHz can be obtained through the cyclic conversion between the transverse core modes LP01 and ...
Yi Zhu, Anbo Guo, Jiangtao Xu, Zhengwei Zhang, Fufei Pang, Weijian Zhang, Xianglong Zeng, Jianfeng Sun   +7 more
wiley   +1 more source

Dual‐resonance sensing for environmental refractive index based on quasi‐BIC states in all‐dielectric metasurface

Nanophotonics, Volume 12, Issue 6, Page 1147-1157, March 2023., 2023
Abstract Metasurface provides a novel way to modulate light energy at specific wavelengths, namely resonances, where there is a sharp drop in the transmission spectrum. Based on the relationship between the resonant position and the environmental condition, various refractive index detection methods have been developed.
Wenjie Chen, Ming Li, Wenhao Zhang, Yuhang Chen   +3 more
wiley   +1 more source

Raman suppression in high-power fiber laser oscillator by long period fiber grating

Results in Physics, 2021
Stimulated Raman scattering (SRS) is a major limiting factor for better performance of high-power fiber lasers. Several spectral filtering methods have been used for Raman suppression, among which long period fiber grating (LPFG) is relatively simple and
Qihao Hu, Xiaofan Zhao, Xin Tian, Meng Wang, Zefeng Wang, Xiaojun Xu   +5 more
doaj   +1 more source

Advancement in COVID‐19 detection using nanomaterial‐based biosensors

Exploration, Volume 3, Issue 1, February 2023., 2023
Interdisciplinary advances in nanomaterials and biotechnology, such as nanomaterials‐based biosensors, have opened new avenues for rapid and ultrasensitive detection of pathogens in the field of healthcare. Many updated nanomaterials‐based biosensors, namely electrochemical, field‐effect transistor, plasmonic, and colorimetric biosensors, employ ...
Phuoc Loc Truong, Yiming Yin, Daeho Lee, Seung Hwan Ko   +3 more
wiley   +1 more source

Angularly Cascaded Long-Period Fiber Grating for Curvature and Temperature Detection

Sensors, 2023
A high-sensitivity curvature sensor with dual-parameter measurement ability based on angularly cascaded long-period fiber grating (AC-LPFG) is proposed and experimentally demonstrated, which consists of two titled LPFGs (TLPFGs) with different tilt ...
Anping Xiao, Jie Du, Qiang Ling, Yao Chen, Zhengtian Gu, Haiyun Chen, Zhangwei Yu, Barerem-Melgueba Mao, Zuguang Guan, Daru Chen   +9 more
doaj   +1 more source

Plasmonic metafiber for all‐fiber Q‐switched cylindrical vector lasers

Nanophotonics, Volume 12, Issue 4, Page 725-735, February 2023., 2023
Abstract Metafibers, by integrating metasurface at the optical fiber tip, are emerging as the significant optical coupling platforms for nanophotonics and fiber‐optic communities. Here, we propose a plasmonic metafiber for converting the fundamental mode to first‐order mode in fiber, and as proof of device performance, demonstrate an all‐fiber Q ...
He Hua, Chao Zeng, Zhiwen He, Hua Lu, Yueqing Du, Dong Mao, Jianlin Zhao   +6 more
wiley   +1 more source

A Low-Cost High-Temperature Sensor Based on Long-Period Fiber/Microfiber Gratings by Local Fictive Temperature Modification

Journal of Chemistry, 2020
A high temperature-sensitive long-period fiber grating (LPFG) sensor fabricated by the local fictive temperature modification is proposed and demonstrated.
Guorui Zhou, Chuanchao Zhang, Xiufang Xie, Yi Wan, Caizhen Yao, Jun Liu, Longfei Niu, Xinxiang Miao, Hai Zhou, Xiaodong Jiang, Shizhen Xu, Haibing Lv   +11 more
doaj   +1 more source

Mode manipulation in a ring–core fiber for OAM monitoring and conversion

Nanophotonics, Volume 11, Issue 21, Page 4889-4898, December 2022., 2022
Abstract The monitoring and conversion of photonic orbital angular momentum (OAM) play fundamental and important roles for both classic and quantum technologies, especially in low‐loss transmission media such as ring‐core fibers (RCFs), which make many OAM applications practical or vastly more flexible.
Guowei Wu, Shecheng Gao, Jiajing Tu, Lei Shen, Yuanhua Feng, Qi Sui, Weiping Liu, Zhaohui Li   +7 more
wiley   +1 more source