The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform

Pengfei Wang - One of the best experts on this subject based on the ideXlab platform.

  • A Curvature Sensor Based on Twisted Single-Mode–Multimode–Single-Mode Hybrid Optical Fiber Structure
    Journal of Lightwave Technology, 2017
    Co-Authors: Ke Tian, Ya-xian Fan, Yifan Xin, Wenlei Yang, Tao Geng, Jing Ren, Gerald Farrell, Elfed Lewis, Pengfei Wang
    Abstract:

    An Optical Fiber curvature sensor based on a twisted multimode Fiber (MMF) sandwiched between two single-mode Fibers (SMF) is proposed and investigated theoretically and experimentally. The measured transmission spectrum exhibits good agreement with theoretical predictions. Compared with a traditional single-mode–multimode–single-mode Fiber Structure sensor, the proposed configuration offers a higher average curvature sensitivity of –2.42 nm/m–1 over a curvature measurement range of 0–1.7390 m–1 and –7.09 dB/m–1 at an operating wavelength of 1537 nm. The temperature sensitivity of this sensor has been determined as 0.01 nm/°C over a wavelength range of 1535–1550 nm and circa 0.007 dB/°C at the wavelength of 1537 nm, over a measured temperature range of 21–121 °C.

  • a curvature sensor based on twisted single mode multimode single mode hybrid Optical Fiber Structure
    Journal of Lightwave Technology, 2017
    Co-Authors: Ke Tian, Ya-xian Fan, Yifan Xin, Wenlei Yang, Tao Geng, Jing Ren, Gerald Farrell, Elfed Lewis, Pengfei Wang
    Abstract:

    An Optical Fiber curvature sensor based on a twisted multimode Fiber (MMF) sandwiched between two single-mode Fibers (SMF) is proposed and investigated theoretically and experimentally. The measured transmission spectrum exhibits good agreement with theoretical predictions. Compared with a traditional single-mode–multimode–single-mode Fiber Structure sensor, the proposed configuration offers a higher average curvature sensitivity of –2.42 nm/m–1 over a curvature measurement range of 0–1.7390 m–1 and –7.09 dB/m–1 at an operating wavelength of 1537 nm. The temperature sensitivity of this sensor has been determined as 0.01 nm/°C over a wavelength range of 1535–1550 nm and circa 0.007 dB/°C at the wavelength of 1537 nm, over a measured temperature range of 21–121 °C.

Hai Xiao - One of the best experts on this subject based on the ideXlab platform.

  • temperature compensated refractometer based on a cascaded sms lpfg Fiber Structure
    Sensors and Actuators B-chemical, 2014
    Co-Authors: Jie Huang, Amardeep Kau, Hanzheng Wang, Lei Yua, Hai Xiao
    Abstract:

    Abstract A hybrid Optical Fiber Structure for refractive index (RI) measurement with the temperature compensation capability is reported. The Structure consists of a CO2 laser-induced long period Fiber grating (LPFG) and a section of single mode–multimode–single mode (SMS) Fiber Structure. The LPFG serves as a refractometer with a temperature compensator using a simple SMS Fiber Structure. The sensing mechanism of this device has been investigated and experimentally demonstrated. The SMS Structure was insensitive towards the change in the ambient RI but was sensitive towards the changes in the ambient temperature whereas the LPFG was sensitive towards both. A sensitivity matrix was built to compensate the temperature-RI crosstalk. The capability of simultaneous measurement of temperature and RI of the sensor was experimentally validated.

  • Temperature Compensated Refractometer Based on a Cascaded SMS/LPFG Fiber Structure
    Sensors and Actuators B: Chemical, 2014
    Co-Authors: Jie Huang, Hanzheng Wang, Xinwei Lan, Amardeep Kaur, Lei Yuan, Hai Xiao
    Abstract:

    Abstract A hybrid Optical Fiber Structure for refractive index (RI) measurement with the temperature compensation capability is reported. The Structure consists of a CO2 laser-induced long period Fiber grating (LPFG) and a section of single mode–multimode–single mode (SMS) Fiber Structure. The LPFG serves as a refractometer with a temperature compensator using a simple SMS Fiber Structure. The sensing mechanism of this device has been investigated and experimentally demonstrated. The SMS Structure was insensitive towards the change in the ambient RI but was sensitive towards the changes in the ambient temperature whereas the LPFG was sensitive towards both. A sensitivity matrix was built to compensate the temperature-RI crosstalk. The capability of simultaneous measurement of temperature and RI of the sensor was experimentally validated.

Santosh Kumar - One of the best experts on this subject based on the ideXlab platform.

  • Detection of L-Cysteine Using Silver Nanoparticles and Graphene Oxide Immobilized Tapered SMS Optical Fiber Structure
    IEEE Sensors Journal, 2020
    Co-Authors: Niteshkumar Agrawal, Ragini Singh, Bingyuan Zhang, Chinmoy Saha, Chandrakanta Kumar, Rajan Jha, Santosh Kumar
    Abstract:

    A label-free highly sensitive tapered Single-Mode-Multimode-Single-Mode (TSMS) Structure-based Optical Fiber sensors (OFSs) is presented in this study for the detection of L-cysteine (L-Cys). Well studied biocompatible nanomaterials (NMs) including silver nanoparticles (AgNPs) and graphene oxide (GO) were synthesized and immobilized over the surface of the sensing probe using self-assembly method. Configurations involving the excitation of localized surface plasmon resonance (LSPR) phenomena proposed in the work are investigated in detail. Further, a comparative study with tapered multimode Fiber (TMMF) OFSs and pioneering investigations on previously reported sensors in this area over the last few years (notable advances only) is also presented in this study. The characterization of NMs and sensing probe are observed using in house high-resolution transmission electron microscope (HR-TEM), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscope (SEM), and atomic force microscopy (AFM) facilities. The proposed method improves the performance of the L-Cys in various fronts, namely: (i) sensitivity, (ii) linearity range, (iii) correlation coefficient, and (iv) limit of detection (LoD). The calibration curve is found to be linear over the range of 10nM to1 mM with an LoD of $63.25~\mu \text{M}$ and sensitivity of 7.0 nm/mM for the proposed TSMS/AgNPs/GO/OFSs.

  • Highly sensitive and selective sensor probe using glucose oxidase/gold nanoparticles/graphene oxide functionalized tapered Optical Fiber Structure for detection of glucose
    Optik, 2020
    Co-Authors: Qingshan Yang, Guo Zhu, Lokendra Singh, Yu Wang, Ragini Singh, Bingyuan Zhang, Xia Zhang, Santosh Kumar
    Abstract:

    Abstract A tapered Optical Fiber Structure based glucose sensor using graphene oxide (GO) and gold nanoparticles (AuNPs) is presented in this study. The waist diameter and length of the taper region are 25 μm and 6 mm, respectively. The taper region was created to expose the evanescent waves to the cladding boundaries and to get interact with the external medium. Further, the cladding of tapered region is covered with GO and AuNPs to increase the biocompatibility of sensor and to initiate the phenomenon of localized surface plasmon resonance (LSPR), respectively. The synthesized GO and AuNPs show the good absorbance properties at the peak absorbance wavelengths of 230 nm and 519 nm, respectively. The characterization of synthesized nanomaterials was done by using UV–vis spectrophotometer and TEM. The characterization of nanomaterial coated Fiber probe was done by using SEM and SEM-EDS. The specificity of developed sensor probe is enhanced by immobilizing them with the glucose oxidase enzyme, that oxidized only in the presence of glucose solution. The attained results show that the developed sensor model is highly sensitive for the detection of glucose concentrations in human bodies with a sensitivity of 1.06 nm/mM in the linear range of 0 mM–11 mM with the autocorrelation accuracy of 0.9386.

  • Development of Dopamine Sensor Using Silver Nanoparticles and PEG-Functionalized Tapered Optical Fiber Structure
    IEEE Transactions on Biomedical Engineering, 2020
    Co-Authors: Niteshkumar Agrawal, Bingyuan Zhang, Brajesh Kumar Kaushik, Chinmoy Saha, Chandrakanta Kumar, Santosh Kumar
    Abstract:

    This article presents a localized surface plasmon resonance (LSPR) phenomenon based Optical Fiber sensor (OFS) for the detection of dopamine (DA). DA functions as a hormone and a neurotransmitter in the human body and plays a crucial role in the peripheral system. To develop the OFS for DA detection, taper Fiber probe was fabricated and immobilized with silver nanoparticles (AgNPs) and functionalized with Polyethylene glycol (PEG). The developed sensor shows the great selectivity in the presence of ascorbic acid (AA) oxidation due to PEG coating. The morphology of the AgNPs and uniformity of coating over the surface of sensing probe were confirmed with UV-visible spectrophotometer, transmission electron microscope (TEM), energy-dispersive X-ray spectroscopy (EDS), and scanning electron microscope (SEM). The calibration curve is found to be linear over the range of 10 nM-1 μM with the lowest detection limit of 0.058 μM. Also provides a wide dynamic range of detection (10 nm-100 μM). The parameters responsible for the performance of OFS, such as sensitivity, detection limit, and selectivity are greatly improved in the proposed sensor. The applicability of the proposed sensor has been validated and have the potential to use for routine diagnosis.

  • LSPR-based cholesterol biosensor using a tapered Optical Fiber Structure.
    Biomedical optics express, 2019
    Co-Authors: Santosh Kumar, Qingshan Yang, Ragini Singh, Xia Zhang, Brajesh Kumar Kaushik, Nan-kuang Chen, Wenjun Wang, Bingyuan Zhang
    Abstract:

    Accurate cholesterol level measurement plays an important role in the diagnosis of severe diseases such as cardiovascular diseases, hypertension, anemia, myxedemia, hyperthyroidism, coronary artery illness. Traditionally, electrochemical sensors have been employed to detect the cholesterol level. However, these sensors have limitations in terms of sensitivity and selectivity. In this paper, a localized surface plasmon resonance (LSPR) -based biosensor is demonstrated that accurately detects and measures the concentration of cholesterol. In the present study, a tapered Optical Fiber-based sensor probe is developed using gold nanoparticles (AuNPs) and cholesterol oxidase (ChOx) to increase the sensitivity and selectivity of the sensor. Synthesized AuNPs were characterized by UV-visible spectrophotometer, transmission electron microscope (TEM), and energy dispersive X-ray spectroscopy (EDS). Further, coating of AuNPs over Fiber was confirmed by scanning electron microscope (SEM). The developed sensor demonstrates for a clinically important cholesterol range of 0 to 10 mM, and the limit of detection is found to be 53.1 nM.

Ke Tian - One of the best experts on this subject based on the ideXlab platform.

  • A Curvature Sensor Based on Twisted Single-Mode–Multimode–Single-Mode Hybrid Optical Fiber Structure
    Journal of Lightwave Technology, 2017
    Co-Authors: Ke Tian, Ya-xian Fan, Yifan Xin, Wenlei Yang, Tao Geng, Jing Ren, Gerald Farrell, Elfed Lewis, Pengfei Wang
    Abstract:

    An Optical Fiber curvature sensor based on a twisted multimode Fiber (MMF) sandwiched between two single-mode Fibers (SMF) is proposed and investigated theoretically and experimentally. The measured transmission spectrum exhibits good agreement with theoretical predictions. Compared with a traditional single-mode–multimode–single-mode Fiber Structure sensor, the proposed configuration offers a higher average curvature sensitivity of –2.42 nm/m–1 over a curvature measurement range of 0–1.7390 m–1 and –7.09 dB/m–1 at an operating wavelength of 1537 nm. The temperature sensitivity of this sensor has been determined as 0.01 nm/°C over a wavelength range of 1535–1550 nm and circa 0.007 dB/°C at the wavelength of 1537 nm, over a measured temperature range of 21–121 °C.

  • a curvature sensor based on twisted single mode multimode single mode hybrid Optical Fiber Structure
    Journal of Lightwave Technology, 2017
    Co-Authors: Ke Tian, Ya-xian Fan, Yifan Xin, Wenlei Yang, Tao Geng, Jing Ren, Gerald Farrell, Elfed Lewis, Pengfei Wang
    Abstract:

    An Optical Fiber curvature sensor based on a twisted multimode Fiber (MMF) sandwiched between two single-mode Fibers (SMF) is proposed and investigated theoretically and experimentally. The measured transmission spectrum exhibits good agreement with theoretical predictions. Compared with a traditional single-mode–multimode–single-mode Fiber Structure sensor, the proposed configuration offers a higher average curvature sensitivity of –2.42 nm/m–1 over a curvature measurement range of 0–1.7390 m–1 and –7.09 dB/m–1 at an operating wavelength of 1537 nm. The temperature sensitivity of this sensor has been determined as 0.01 nm/°C over a wavelength range of 1535–1550 nm and circa 0.007 dB/°C at the wavelength of 1537 nm, over a measured temperature range of 21–121 °C.

Jie Huang - One of the best experts on this subject based on the ideXlab platform.

  • temperature compensated refractometer based on a cascaded sms lpfg Fiber Structure
    Sensors and Actuators B-chemical, 2014
    Co-Authors: Jie Huang, Amardeep Kau, Hanzheng Wang, Lei Yua, Hai Xiao
    Abstract:

    Abstract A hybrid Optical Fiber Structure for refractive index (RI) measurement with the temperature compensation capability is reported. The Structure consists of a CO2 laser-induced long period Fiber grating (LPFG) and a section of single mode–multimode–single mode (SMS) Fiber Structure. The LPFG serves as a refractometer with a temperature compensator using a simple SMS Fiber Structure. The sensing mechanism of this device has been investigated and experimentally demonstrated. The SMS Structure was insensitive towards the change in the ambient RI but was sensitive towards the changes in the ambient temperature whereas the LPFG was sensitive towards both. A sensitivity matrix was built to compensate the temperature-RI crosstalk. The capability of simultaneous measurement of temperature and RI of the sensor was experimentally validated.

  • Temperature Compensated Refractometer Based on a Cascaded SMS/LPFG Fiber Structure
    Sensors and Actuators B: Chemical, 2014
    Co-Authors: Jie Huang, Hanzheng Wang, Xinwei Lan, Amardeep Kaur, Lei Yuan, Hai Xiao
    Abstract:

    Abstract A hybrid Optical Fiber Structure for refractive index (RI) measurement with the temperature compensation capability is reported. The Structure consists of a CO2 laser-induced long period Fiber grating (LPFG) and a section of single mode–multimode–single mode (SMS) Fiber Structure. The LPFG serves as a refractometer with a temperature compensator using a simple SMS Fiber Structure. The sensing mechanism of this device has been investigated and experimentally demonstrated. The SMS Structure was insensitive towards the change in the ambient RI but was sensitive towards the changes in the ambient temperature whereas the LPFG was sensitive towards both. A sensitivity matrix was built to compensate the temperature-RI crosstalk. The capability of simultaneous measurement of temperature and RI of the sensor was experimentally validated.