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578 results
  • Tin Dioxide Thin Film with UV-enhanced Acetone Detection in Microwave Frequency Range. [Journal Article]
    Micromachines (Basel) 2019; 10(9)Rydosz A, Staszek K, … Gruszczynski S
  • In this paper, the UV illumination effect for microwave gas sensors based on the tin dioxide was verified. A UV LED with emission wavelength close to the absorption edge of the SnO2 gas-sensing layer was selected as the UV source. The developed gas sensors were tested under exposure to acetone in the 0-200 ppm range at room temperature. The sensor's complex reflection coefficient corresponding to…
  • An Event Recognition Method for Φ-OTDR Sensing System Based on Deep Learning. [Journal Article]
    Sensors (Basel) 2019; 19(15)Shi Y, Wang Y, … Fan Z
  • Phase-sensitive optical time domain reflectometer (Φ-OTDR) based distributed optical fiber sensing system has been widely used in many fields such as long range pipeline pre-warning, perimeter security and structure health monitoring. However, the lack of event recognition ability is always being the bottleneck of Φ-OTDR in field application. An event recognition method based on deep learning is …
  • Theoretical assessment of the OTDR detector noise on plasma current measurement in tokamaks. [Journal Article]
    Appl Opt 2019; 58(11):2795-2802Motuz R, Leysen W, … Wuilpart M
  • In this paper, we propose a theoretical study dedicated to the assessment of plasma current measurement in magnetic confinement fusion reactors using a polarization optical time-domain reflectometer (POTDR) setup with a low-birefringence fiber used as the sensing fiber. We consider the general case of a non-uniform magnetic-field distribution along the sensing fiber. The numerical simulations, ba…
  • Scanning Microwave Microscopy of Vital Mitochondria in Respiration Buffer. [Journal Article]
    IEEE MTTS Int Microw Symp 2018; 2018:115-118Li J, Nemati Z, … Burke PJ
  • We demonstrate imaging using scanning microwave microscopy (SMM) of vital mitochondria in respiration buffer. The mitochondria are isolated from cultured HeLa cells and tethered to a solid graphene support. The mitochondria are kept vital (alive) using a respiration buffer, which provides nutrients to sustain the Krebs cycle. We verify that the mitochondria are "alive" by measuring the membrane p…
  • Recent Advances in Brillouin Optical Time Domain Reflectometry. [Review]
    Sensors (Basel) 2019; 19(8)Bai Q, Wang Q, … Jin B
  • In the past two decades Brillouin-based sensors have emerged as a newly-developed optical fiber sensing technology for distributed temperature and strain measurements. Among these, the Brillouin optical time domain reflectometer (BOTDR) has attracted more and more research attention, because of its exclusive advantages, including single-end access, simple system architecture, easy implementation …
  • Simultaneous Transmission of Photonic Services over One Fiber with an ITU 100 GHz Grid. [Journal Article]
    Sensors (Basel) 2019; 19(7)Horvath T, Munster P, … Smotlacha V
  • The increasing interest in distributed sensors and the decreasing price of optical components have led to leveraging the use of existing fiber in deployments over optical networks and more application possibilities (from seismic activity measurement to perimeter protection and tunnel fire detection). Because of the possibility of data interference in single fibers, dark fibers are used. On the on…
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