OPTICAL ENGINEERING
·
2022
·
IF 1.352
Min Zhang,Zhihai Liu,Yiwei Ma,Yu Zhang,Yaxun Zhang,Xinghua Yang,Jianzhong Zhang,Tao Geng,Libo Yuan
We propose a gelatin-coated long period fiber grating humidity sensor which has temperature compensation for low-error humidity detection. The output spectrum shows three resonance dips. The dip caused by gelatin-coated grating has humidity sensitivity of 0.09 nm/%RH and temperature sensitivity of 0.15 nm/°C. Another two dips caused by PDMS-coated grating have almost no response to humidity, which can be used for temperature compensation under low temperature and high temperature range, respectively. We come up with a coefficient matrix and experimentally obtain the humidity and temperature sensitivity of both resonance dips, thus temperature and humidity can be demodulated.
研究领域:
光学传感
·
材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Dingyi Feng,Hongrong Zheng,Hao Sun,Jinze Li,Jiawei Xi,Li Deng,Yasong Guo,Biqiang Jiang,Jianlin Zhao
A fiber-optic humidity sensor based on excessively tilted fiber grating (Ex-TFG) wrapped with tin dioxide (SnO 2 )/polyvinyl alcohol (PVA) hybrid nanofibers is presented. Relative humidity (RH) rise causes the changes both in refractive index (RI) and geometry size of the film. The transmitted spectrum of the Ex-TFG changes as a result, owing to the strong interaction of the excited forward propagating cladding modes to the surface coating . Experimental results demonstrate the maximum intensity sensitivity of 0.43 dB/%RH in RH range of 35%−75%. Compared with pure PVA film coated ones, the RH sensitivity of the SnO 2 /PVA wrapped grating is vastly enhanced by one order of magnitude. The reticular morphology of electrospun SnO 2 /PVA film around the Ex-TFG promises the unimpeded permeation of water molecules, and then the sensor exhibits an ultrafast response of ∼67 ms and recovery times of ∼83 ms, by monitoring the human breathing with different rhythms. Lastly, the negligible spectral deformation to temperature perturbations verifies the temperature de-correlation of the designed RH sensor. This work indicates that the proposed SnO 2 /PVA nanofibers wrapped Ex-TFG can provide a simple, robust and high-sensitive optic device for healthcare monitoring, environmental and biochemical sensing applications.
研究领域:
光学传感
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材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2025
·Vol. 33
·期 1
·1359-1370
·
IF 3.3
Huiyuan Zhang,Mingyu Li,Mingyu Li,Qiu-Shun Li,Qiu-Shun Li,Xiujing Yan,Yubo Xia,Yuxia Song,Tuo Chen,Wen-Fei Dong,Jian-Jun He
In this paper, poly(diallyldimethylammonium chloride)(PDDA)/poly(sodium styrene sulfonate)(PSS) nanomembranes were deposited on the surface of long-period fiber gratings (LPFG) using the electrostatic layer-by-layer (LBL) assembly method, and the effect of NaCl on the modulation of LPFG double peaks by PDDA/PSS nanomembranes was investigated. The principle behind the emergence of double peaks was first explored using coupled mode theory, revealing that changes in the mode effective refractive index(RI) occur as the number of nanomembrane layers increases. The experimental results showed that under the conditions of PDDA with NaCl/PSS without NaCl and PDDA without NaCl/PSS with NaCl, double peaks do not appear in the spectra of LPFG as the number of thin film layers increases. In contrast, highly sensitive double peaks appear in the spectra of LPFG when both PDDA and PSS contain NaCl. Additionally, the range of these double peaks was explored. It was shown that the sensitivity of LPFG to the nanomembrane reached a maximum at 79-81 bilayers, with a sensitivity of 37.8 nm/bilayer, and the appearance of double peaks was consistent with the theoretical simulation. The findings of this study will be applied to the modification of LPFG surface biofunctional membranes and the highly sensitive detection of biochemical substances.
研究领域:
光学传感
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2024
·Vol. 32
·期 9
·15851-15861
·
IF 3.2
Xiujuan Zhong,Wang Zhan,Li Ma,Guolu Yin,Guolu Yin
Cadmium (Cd2+) ion is one of the most crucial industrial pollutants that cause serious harm to the human body. We proposed and experimentally demonstrated a highly sensitive Cd2+ sensor based on hydrogel coated excessively tilted fiber grating. The hydrogel with the functional monomer of the allyl thiourea can specifically bind to Cd2+, and hence forming a complex. The grating excites high order cladding modes, and ensures a sufficient interaction between the light and hydrogel binding to Cd2+, providing highly sensitive monitoring. The results show that the sensor can detect 0-160 pM Cd2+ in aqueous solution. The maximum sensitivity is 10600 nm/µM, and the minimum detection concentration is 20 pM (about 0.004 ppb), which is much less than that of the international standard (3 ppb). The proposed sensor exhibits high sensitivity, ultra-low detection limit, specificity, and a compact structure, offering potential as a tool for Cd2+ detection in aqueous solution.
研究领域:
环境科学
·
生物医学工程
·
光学传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yufei Shi,Fuxiang Wang,Feng Gao,Jianing Kang,Jun Wu,Ziqiao Ren,Jun Zhou,Jie Dong,Wenjun Zhou,Changyu Shen
Finger distance perception plays a crucial role in enabling humanoid intelligent robotic systems to achieve smooth interaction with humans. Here, a rapidly response optical humidity sensor enabled with graphene quantum dots (GQD) for non-contact finger distance detection was proposed. The GQD was prepared through the functionalization of graphene oxide (GO) with hydrophilic groups. This modification enhances the responsiveness of GO to atmospheric humidity and promotes the deposition of conformal films of functional materials on the surfaces of optical fiber. Utilizing a light-driven coating method, the GQD was deposited onto a tilted fiber Bragg grating (TFBG) to fabricate humidity sensor. When water molecules were absorbed by GQD, the dielectric constant of GQD film was changed, causing an alteration in the intensities of the TFBG’s cladding modes. The proposed sensor shows a sensitivity of 0.032 dB/%RH with the equilibrium response and recovery time of 3.66 s and 0.92 s, respectively. The equilibrium recovery time is the fastest as far as we know. Furthermore, the sensor is capable of precisely identifying the action of a finger, such as approaching, remaining, and departing with a detection range of 0–10 mm.
研究领域:
传感技术
·
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2021
·Vol. 146
·期 11
·3617-3622
·
IF 4.616
Wenjie Li,Yinping Miao,Chengwei Fei,Hongmin Zhang,Bin Li,Kailiang Zhang
An enhanced photothermal signal detection method based on graphene oxide (GO) integrated long period fiber grating (LPFG) for on-site sodium copper chlorophyllin (SCC) quantification is proposed. SCC, as a porphyrin compound, can be photonically excited to induce a stronger photothermal effect. GO offers superior molecular adsorption and thermal conductivity properties; depositing it on the LPFG surface significantly improves the sensitivity and detection efficiency of the SCC photothermal signal, when irradiated with a 405 nm laser. The experimental results showed improved performance compared with those from uncoated LPFG, with a sensitivity of 0.0587 dB (mg L−1)−1 and a limit of detection (LOD) of 0.17 mg kg−1, which is also an order of magnitude lower than that of traditional high-performance liquid chromatography. The proposed method has potential applications in the fields of real-time food safety monitoring, environmental pollutant detection, and disease diagnosis.
研究领域:
光学传感
·
材料科学
·
食品安全
·
环境监测
·
生物医学诊断
✓ 已验证
DOI
PubMed
高影响因子
OPTICAL FIBER TECHNOLOGY
·
2024
·
IF 2.6
Lei Liang,Hao Yan,Aochi Jia,Haiyan Zhang,Menghao Li,Kaiyu Chai,Jiawei Xi,Shichang Li,Dingyi Feng
Accurate detection of carbon dioxide (CO 2 ) is of great significance to environmental protection. In this study, a simple, highly sensitive, and linearity CO 2 sensors is successfully proposed. Furthermore, for the first time, the sensor was demonstrated by electrospinning a layer of polyether sulfone (PES) nanofiber film wrapped onto a micro-tapered long period fiber grating (MT-LPFG). Given that CO 2 molecules effortlessly permeate the mesh pores of the electrospun PES films, modulations in both the refractive index (RI) and volume of PES films can be induced, consequently leading to alterations in the resonant wavelength of the grating. The experimental results demonstrate the exceptional performance of the MT-LPFG sensor utilizing PES films, showcasing a significant response within a range of (1.99 %-10 %). This sensor exhibits a sensitivity of 0.068 nm/%, linearity of 0.994, and an impressively low CO 2 detection limit of 1.2 %. Moreover, the sensor exhibits exceptional recovery properties and demonstrates clear differentiation between nitrogen (N 2 ) and CO 2 . This cost-effective sensor holds significant economic value and holds promise for widespread application in industrial processes and commercialization.
研究领域:
环境科学
·
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jie Yan,Runcheng Liu,Jian Shi,Wen Yang,Shouzhen Jiang,Zihao Zhang,Mingshun Jiang
The high toxicity and bioaccumulation of heavy metal ion pollutants pose severe threats to the environment and public health. Tilted fiber Bragg grating-based surface plasmon resonance (TFBG-SPR) sensors have emerged as effective tools for heavy metal ion sensing owing to their portability and rapid response. These sensors typically feature a single plasmonic structure. And they are constrained by hardware restrictions and complex spectral analyses. Thus, these conventional designs render multicomponent detection and precise analysis challenging. To address these limitations, this study introduces a lightweight multichannel sensing platform based on a composite plasmonic TFBG structure. A two-dimensional metal–organic framework (2D MOF Cu-TCPP(Pt)) and silver nanoparticles (AgNPs) are integrated onto a gold (Au)-coated TFBG surface. This configuration enables strong coupling between the SPR and localized SPR (LSPR). Hence, the signal sensitivity is enhanced. The molecular sieve effect of the Cu-TCPP(Pt) improves the target analyte enrichment and suppresses the background interference, thereby ensuring a stable signal output. Additionally, a DNA aptamer conformational switching strategy ensures selective target analyte recognition. This platform integrates an AgNPs@Cu-TCPP(Pt)/Au/TFBG sensor, optical channel array, and real-time signal processing module and enables simultaneous detection of Pb 2+ , Cd 2+ , and Hg 2+ within 6 min, with detection limits of 0.007, 0.012, and 0.005 nM, respectively. The proposed sensor effectively mitigates background interference in complex matrices, demonstrating excellent linearity and recovery. Compared with conventional TFBG-based methods, this platform offers high sensitivity, short detection times, and enhanced robustness, and presents a novel solution for real-time multicomponent detection in complex matrices.
研究领域:
环境科学
·
传感技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Ku Liang,Tian Tian,Yiwei Ma,Jinhui Cui,Weimin Sun,Tao Geng
A high-sensitivity assembled long-period grating fiber (A-LPFG) ultraviolet sensor based on double-layer material film (equivalent refractive index theory) is proposed and validated. This sensor is composed of A-LPFG coated with zinc oxide (ZnO) and propylene glycol film. Among them, the propylene glycol wrapped around the outer layer enhances the response of the sensor to the external environment base on the theory of equivalent refractive index (ERI). Moreover, due to the generation of photogenerated carriers, ultraviolet (UV) sensitivity of A-LPFG coated with ZnO film is significantly improved. The experimental results show that the designed ultraviolet long period fiber grating (UV-LPFG) has a sensitivity of −1.212 nm/(mW/cm 2 ) for UV sensing, with response times of 0.24 s (rise time) and 0.48 s (decay time). In addition, this sensor also has advantages such as high sensitivity, low cost, and good practicality, demonstrating excellent performance characteristics.
研究领域:
光学传感器
·
材料科学
·
光纤技术
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Mingjiang Huang,Binbin Luo,Shengxi Wu,Miwan Shi,Yan Liu,Shenghui Shi
A D-Shaped, excessively tilted fiber grating (ExTFG) immunosensor modified with molybdenum disulfide (MoS 2 ) was developed for label-free and specific detection of growth-stimulated expressed gene 2 protein (ST2), a critical biomarker for heart failure. The D-Shaped ExTFG sensor was fabricated by side-polishing an ExTFG along its slow axis to enhance refractive index (RI) sensitivity. It was subsequently biofunctionalized with MoS 2 and anti-ST2 monoclonal antibodies (anti-ST2 MAbs) for ST2 immunoassays. The RI sensitivities of the sensor after side-polishing and MoS 2 coating were thoroughly investigated. Additionally, the immunodetection properties of the sensor were evaluated across varying concentrations of ST2 antigen solutions, as well as its specificity and clinical performance in serum samples from healthy individuals and patients. Experimental results revealed that the sensitivity of the MoS 2 -modified D-Shaped ExTFG immunosensor for ST2 reached 0.335 nm/[log(mg/mL)] over a wide linear testing range of 1 ng/mL to 1000 ng/mL, with a detection limit of 0.472 ng/mL. This represents an improvement of approximately 86 % compared to the ExTFG without D-Shaped modification and demonstrates excellent specificity for ST2 biomarkers even in complex clinical sera. The MoS 2 -modified D-Shaped ExTFG immunosensor exhibits notable advantages, including stability, practical usability, and high clinical specificity, making it a promising candidate for biomedical and other analytical applications.
研究领域:
生物医学工程
·
临床检验
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LIGHTWAVE TECHNOLOGY
·
2025
·
IF 4.8
Hongrong Zheng,Xin Kang,Qihao Yang,Haider Syed Irshad,Dingyi Feng,Fu Liu,Xuetao Gan,Biqiang Jiang
Recent increased attention to environmental and health monitoring demands faster response and reliable gas concentration measurement technology. Herein, we propose an optical fiber-based strategy for fast ethanol gas concentration sensing using a tilted fiber grating (TFG) assisted with a nanolayer of HKUST-1. The TFG excites unique cladding mode resonances and strong evanescent field that interact with the in-situ grown HKUST-1 nanolayer that provides a path for the penetration and absorption of ethanol gas. The TFG, functionalized with 281 nm thick HKUST-1 nanolayer, exhibits a sensitivity of 7.7 nm/% over an ethanol gas concentration range of 0∼0.14% and a limit of detection of 35 ppm at room temperature, by tracking the resonance wavelength shift of a cladding mode. Time-domain experiments reveal the response and recovery times of 26.7 s and 10.3 s, respectively, attributed to the high surface area and porosity of the HKUST-1 nanolayer. The proposed fiberoptic ethanol gas sensor offers ease of integration, rapid response, and high repeatability and reliability, making it suitable for applications such as chemical plant leakage monitoring and medical breath analysis.
研究领域:
光纤传感
·
气体传感技术
·
纳米材料功能化
·
环境监测
·
健康监测
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Xiang Qin,Wenlin Feng,Xiaozhan Yang,Jianwei Wei,Guojia Huang
A molybdenum sulfide/citric acid composite membrane-coated long period fiber grating (LPFG) sensor was demonstrated and applied to detect the trace hydrogen sulfide gas. The sensor was fabricated by growing molybdenum sulfide/citric acid composite film on the surface of optical fiber grating by using the sol-gel and dip-coating techniques. The sensor measures the hydrogen sulfide concentration by monitoring the molecular adsorption-induced resonant wavelength shift of LPFG in near infrared (∼1555 nm) region. Experimental results show that with the increasing concentration of hydrogen sulfide, the transmission spectrum appears blue shift with time response of 89 s. In addition, a high sensitivity of 10.52 pm/ppm and a good linear relationship are achieved within a measurement range from 0 to 70 ppm. Furthermore, there is an excellent selectivity for H 2 S, which has also been confirmed by the surface adsorption energy results of molybdenum sulfide with five common gases in the air (H 2 S, N 2 , CO 2 , O 2 and Ar) based on the density functional theory calculations. The proposed sensor has an excellent detection limit of hydrogen sulfide which is as low as 0.5 ppm. This sensor has the advantages of simple structure, easy manufacture, high sensitivity and low cost, and can be used in hydrogen sulfide gas sensing places such as factories, sewers, and so on.
研究领域:
传感技术
·
材料科学
·
环境监测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）