Results 31 to 40 of about 11,192,233 (306)
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
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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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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.
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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
Fiber Bragg Grating Bonding Characterization under Long-Period Cyclic Loading
Photonics, 2023 The Smart Landing Gear system to be developed in the framework of the ANGELA project provides the strain measurements on landing gear structure at landings, and this system should be maintained efficiently under operational conditions.
Angela Brindisi +7 more
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Long Period Fiber Grating Fabrication by Two-Step Infrared Femtosecond Fiber Laser Exposure
IEEE Photonics Journal, 2017 We develop a two-step infrared (IR) femtosecond fiber laser exposure technique to flexibly fabricate long period fiber gratings (LPFGs) with a high peak band-rejection efficiency of 35.4 dB, insertion loss of 4.36 dB, and 3 dB ...
Cong Zhang +4 more
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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
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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
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Dynamic Responses Measured by Optical Fiber Sensor for Structural Health Monitoring
Applied Sciences, 2019 An optical fiber sensing system integrating a fiber Bragg grating (FBG) sensor, a long-period fiber grating (LPFG) optical filter and a photodetector is presented to monitor the dynamic response of a structure subjected to base excitation and impact ...
Shiuh-Chuan Her, Shin-Chieh Chung
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Sensors, 2010 This paper presents the feasibility of utilizing fiber Bragg grating (FBG) and long-period fiber grating (LPFG) sensors for nondestructive evaluation (NDE) of infrastructures using Portland cement concretes and asphalt mixtures for temperature, strain ...
Jian-Neng Wang, Jaw-Luen Tang
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