Results 21 to 30 of about 145,791 (256)
Applied Sciences, 2020 A Bragg grating inscribed into an inorganic optical fiber was tested in proton and neutron fields up to doses of 472 Gy. Observation showed that radiation had no effect on the performance of the Fiber Bragg Grating (FBG) used as a gauge measuring ...
Michael Bakaic +6 more
doaj +1 more source
Efficient large-scale multiplexing of fiber Bragg grating and fiber Fabry-Perot sensors for structural health monitoring applications [PDF]
, 2006 Fiber Bragg gratings have been demonstrated as a versatile sensor for structural health monitoring. We present an efficient and cost effective multiplexing method for fiber Bragg grating and fiber Fabry-Perot sensors based on a broadband mode-locked ...
Kirkendall, C. K. +2 more
core +3 more sources
Temperature and strain discrimination using a single tilted fibre Bragg grating [PDF]
, 2007 A fibre optic sensor capable of discriminating between temperature and strain, using a single fibre Bragg grating, is presented. The technique exploits the core–cladding mode coupling of a tilted fibre Bragg grating (TFBG). The core and cladding modes
Tatam, Ralph P. +2 more
core +1 more source
Multi-Harmonic Bragg Gratings [PDF]
Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, 1999 Multi-harmonic Fibre Bragg Gratings have been demonstrated experimentally and studied in detail theoretically showing complex reflection response and band-gap disappearance.
Zervas, M.N. +3 more
openaire +1 more source
New multiplexing scheme for monitoring fiber optic Bragg grating sensors in the coherence domain
, 1997 A new multiplexing scheme for monitoring fiber optic Bragg gratings in the coherence domain has been developed. Grating pairs with different grating distances are distributed along a fiber line, and interference between their reflections is monitored ...
Usbeck, K. +11 more
core +2 more sources
Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating
Sensors, 2020 We propose and demonstrate a temperature and humidity sensor based on a fluorinated polyimide film and fiber Bragg grating. Moisture-induced film expansion or contraction causes an extra strain, which is transferred to the fiber Bragg grating and leads ...
Xiuxiu Xu +3 more
doaj +1 more source
Time-division-multiplexed interrogation of fibre Bragg grating sensors using laser diodes [PDF]
, 2001 An intensity-based technique for the interrogation of fibre Bragg grating sensors is described. The technique utilizes two longitudinal modes of a single, pulsed laser diode as a dual-wavelength source for grating illumination.
Wilson, A. +2 more
core +1 more source
A Fiber Bragg Grating-Based Anemometer [PDF]
Sensors, 2018 A novel fiber anemometer based on two pairs of fiber gratings is experimentally demonstrated and can simultaneously detect wind speed and wind direction. One pair of gratings, which are separated by 90° in space, is fixed on a small stainless steel pipe driven by a rotating disc for measuring the wind-direction angle.
Huang, Chuan-Ying +3 more
openaire +4 more sources
High-speed, solid state, interferometric interrogator and multiplexer for fiber Bragg grating sensors [PDF]
, 2011 We report on the design and prototyping of a robust high-speed interferometric multiplexer and interrogator for fiber Bragg grating sensors. The scheme is based on the combination of active WDM channel switching and passive, instantaneous interferometry,
Niewczas, Pawel, Orr, Philip
core +3 more sources
Silicon graphene Bragg gratings
Optics Express, 2014 We propose the use of interleaved graphene sections on top of a silicon waveguide to implement tunable Bragg gratings. The filter central wavelength and bandwidth can be controlled changing the chemical potential of the graphene sections. Apodization techniques are also presented.
Capmany, Jose +2 more
openaire +3 more sources