Results 21 to 30 of about 276 (190)
Proceedings, 2019 Optical fiber sensors based on in-fiber Long Period Gratings (LPG) have attracted considerableinterest in the context of environmental, chemical and biochemical sensing. [...]
Cosimo Trono +2 more
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Long-Period Fiber Gratings in Active Fibers
, 2013 Traditionally, long period fiber gratings (LPG) are made in passive optical fibers that have negligible loss. However, loss or gain that can be controlled via optical pumping adds a new degree of freedom and - as will be shown in this chapter - brings many new and interesting properties.
David Krmak +2 more
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Dissimilar-fiber long-period fiber gratings: concept and demonstration
Applied Optics, 2017 A new type of long-period fiber grating structure that contains dissimilar fiber types is proposed. This dissimilar-fiber long-period fiber grating (DF-LPFG) structure is fabricated by splicing together subperiod sections of dissimilar fiber types. Due to the large index differences that can exist between various fiber types, the resulting DF-LPFGs can
Pengfei, Wang, Thomas K, Gaylord
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Advances on Polymer Optical Fiber Gratings Using a KrF Pulsed Laser System Operating at 248 nm
Fibers, 2018 This paper presents the achievements and progress made on the polymer optical fiber (POF) gratings inscription in different types of Fiber Bragg Gratings (FBGs) and long period gratings (LPGs). Since the first demonstration of POFBGs in 1999, significant
Carlos A. F. Marques +7 more
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Long Period Fiber Gratings Inscribed With an Improved Two-Dimensional Scanning Technique
IEEE Photonics Journal, 2014 We demonstrated a promising CO2 laser irradiation system based on an improved 2-D scanning technique. Such a system could be used to inscribe high-quality long period fiber gratings (LPFGs) with good reproducibility of grating inscription, which ...
Xiaoyong Zhong +7 more
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Sensing Features of Long Period Gratings in Hollow Core Fibers [PDF]
Sensors, 2015 We report on the investigation of the sensing features of the Long-Period fiber Gratings (LPGs) fabricated in hollow core photonic crystal fibers (HC-PCFs) by the pressure assisted Electric Arc Discharge (EAD) technique. In particular, the characterization of the LPG in terms of shift in resonant wavelengths and changes in attenuation band depth to the
IADICICCO, Agostino +1 more
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Advanced Functional Materials, EarlyView.Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner +14 more
wiley +1 more source
Advances in Sustainable and Wearable Textile Based Soft Robotics
Advanced Functional Materials, EarlyView.This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas +6 more
wiley +1 more source
Long period fiber gratings in anti-resonant hollow core fiber
Applied Physics ExpressLong period gratings, based on anti-resonant hollow core fibers (AR-HCFs), are fabricated using a high-frequency CO _2 laser pulse by carving periodic grooves. This device exhibits both axial strain and bending sensing characteristics.
Ligang Huang +8 more
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Fibers, 2017 The manufacturing and spectral features of different types of long period fiber gratings (LPFGs), ranging from phase-shifted, turn-around point, and internally tilted gratings, to pseudo-random gratings, are described and discussed in detail.
Francesco Chiavaioli +2 more
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