Results 21 to 30 of about 8,419 (298)
Long-period gratings in chalcogenide fibers
Optics Express, 2006 We report the first demonstration of long period gratings in single mode As(2)Se(3) chalcogenide glass fiber. The grating is implemented by pressing a threaded rod against a short piece of fiber. Its strength can be tuned over a 25 dB range, has high repeatability, and is fully reversible.
Dominik, Pudo +2 more
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Photochemical long-period grating fabrication in pure-fused-silica photonic crystal fiber [PDF]
, 2007 We report on first photochemical recording of a long-period fiber grating (LPFG) in a pure fused silica photonic crystal fiber (PCF), which is based on two-photon absorption (TPA) of high-intensity femtosecond 264 nm pulses.
Fotiadi, A.A. +7 more
core +1 more source
Fabrication of long period fiber gratings of subnanometric bandwidth [PDF]
Optics Letters, 2017 This Letter reports on the fabrication of long period fiber gratings having subnanometric bandwidths in the 1500 nm spectral region. Large gratings have been photo inscribed in a high NA fiber; the grating pitch and the order of the HE cladding mode are optimized to produce gratings with a large number of periods and prevent the coupling to TE, TM, or ...
Poveda-Wong, L. +5 more
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A long period grating based directional flow sensor [PDF]
, 2008 A chirped long period grating (LPG) is used as a directional flow sensor by monitoring the change in the transmission spectrum upon immersion in an oil of refractive index higher than that of the fibre cladding. The change in profile of an attenuation
Stephen J. Buggy +5 more
core +1 more source
Switchable Ytterbium Fiber Laser Based on a Symmetrical Long-Period Fiber Grating
IEEE Photonics Journal, 2021 In this study, a switchable ytterbium-doped fiber laser based on symmetrical long-period fiber grating (LPFG) is presented. The LPFG is used as a wavelength-selective filter (WSF).
Erika C. Silva-Alvarado +7 more
doaj +1 more source
Arc-Induced Long Period Fiber Gratings [PDF]
Journal of Sensors, 2016 Long period fiber gratings produced by the electric arc technique have found an increasing interest by the scientific community due to their ease to fabricate, virtually enabling the inscription in any kind of fiber, low cost, and flexibility. In 2005 we have presented the first review on this subject.
openaire +1 more source
Optical fibre long period grating based selective vapour sensing of volatile organic compounds [PDF]
, 2010 The chemical sensing capabilities of an optical fibre long period grating (LPG) coated with a functional material are explored. The LPG period and coating thickness are chosen such that the mode transition region, characteristic of LPGs coated with ...
Tatam, Ralph P. +4 more
core +1 more source
Cryogenic Temperature Response Of Fibre Optic Long Period Gratings. [PDF]
, 2003 The thermal response of the attenuation bands of an optical fibre long period grating was monitored over a temperature range of 4.2–280 K. A linear dependence of the central wavelength of the band, of gradient 0.2 nm K-1, was observed over the range 77 ...
Bateman, Rod +4 more
core +1 more source
Sensors, 2010 In the sensing applications of optical fiber grating, it is necessary to reduce the transmission-type polarization dependence to isolate the sensing parameter.
Jaebum Son +3 more
doaj +1 more source
Mechanically-Induced Long-Period Fiber Gratings Using Laminated Plates
Sensors, 2020 This work presents a formation method of mechanically-induced long-period fiber gratings using laminated plates. The mechanically-induced long-period fiber grating is temporarily inscribed by compressing the optical fiber between a flat plate and the ...
Ismael Torres-Gómez +2 more
doaj +1 more source