Results 1 to 10 of about 97 (96)
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
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Fiber Bragg Grating Based Thermometry [PDF]
NCSLI Measure, 2015 In recent years there has been considerable interest in developing photonic temperature sensors such as the Fiber Bragg gratings (FBG) as an alternative to resistance thermometry. In this study we examine the thermal response of FBGs over the temperature range of 233 K to 393 K.
John Quintavalle +3 more
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Bioresorbable optical fiber Bragg gratings [PDF]
Optics Letters, 2018 We demonstrate, for the first time, an inscription and wet dissolution study of Bragg gratings in a bioresorbable calcium-phosphate glass optical fiber. Bragg gratings, with average refractive index changes of 5.8×10-4, were inscribed using 193 nm excimer laser radiation.
Pugliese D. +6 more
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Writing Bragg Gratings in Multicore Fibers [PDF]
Journal of Visualized Experiments, 2016 Fiber Bragg gratings in multicore fibers can be used as compact and robust filters in astronomical and other research and commercial applications. Strong suppression at a single wavelength requires that all cores have matching transmission profiles. These gratings cannot be inscribed using the same method as for single-core fibers because the curved ...
Seong-sik Min +6 more
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Photothermal effects in fiber Bragg gratings
Applied Optics, 2006 Writing a fiber Bragg grating in optical fiber generates an intrinsic broadband absorption term that can result in photothermal heating during subsequent use with fiber core guided light. This, in turn, can cause a significant shift of a grating resonance via the thermo-optic coefficient, even at low in-fiber light powers.
Littler, I, Grujic, T, Eggleton, B
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Bragg gratings and BIO-Bragg-gratings in tapered optical fibers
EPJ Web of Conferences, 2022 Tapered optical fibres are well-established devices for different applications, in order to exploit nonlinear effects, manage dispersion, excite azimuthal resonances in microresonators (so-called Whispering Gallery Modes). Also, the micro- or nanofibres guide optical-fields with large evanescent fields. In this talk, we will focus on the combination of
Delgado-Pinar Martina +3 more
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Chebyshev apodized fiber Bragg gratings
Science Progress, 2021 In this paper, a new apodized fiber Bragg grating (FBG) structure, the Chebyshev apodization, is proposed. The Chebyshev polynomial distribution has been widely used for the optimal design of antennas and filters, but it has not been used for designing FBGs.
Nai-Hsiang Sun +3 more
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Influence of Humidity on Fiber Bragg Grating Sensors [PDF]
Advances in Materials Science and Engineering, 2014 We demonstrate the influence of the relative humidity (RH) on the wavelength of fiber Bragg grating sensors (FBGS), performing tests with five FBGS at different humidity and temperature conditions. These tests were performed in a climate chamber whose RH changes according to a scheduled profile from 30% to 90%, in steps of 10%.
Ander Montero +5 more
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Nanosecond switching of fiber Bragg gratings
Optics Express, 2007 A FBG was written in a two-hole fiber with internal alloy electrodes. Nanosecond high current pulses cause metal expansion, increase birefringence and tune the gratings with a response time of 29 ns. This short length, low loss, all-spliced high-speed wavelength switching devices described here has potential use in Q-switching fiber laser.
Zhangwei Yu +4 more
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Formation and Applications of the Secondary Fiber Bragg Grating [PDF]
Sensors, 2017 Being one of the most proven fiber optic devices, the fiber Bragg grating has developed continually to extend its applications, particularly in extreme environments. Accompanying the growth of Type-IIa Bragg gratings in some active fibers, a new resonance appears at the shorter wavelength.
Bai-Ou Guan +3 more
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