Results 41 to 50 of about 8,419 (298)
Response of fibre optic long period gratings operating near the phase matching turning point to the deposition of nanostructured coatings. [PDF]
, 2008 The response of the dual resonant bands of a fibre optic long period grating operating near the phase matching turning point to the deposition of a nanostructured coating is investigated. The dual resonant bands are observed to show a high sensitivity to
Tatam, Ralph P. +3 more
core +1 more source
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
openaire +2 more sources
Small-period long-period fiber grating with improved refractive index sensitivity and dual-parameter sensing ability [PDF]
, 2017 We UV inscribe and characterize a long-period fiber grating with a period of 25 μm. A series of polarization-dependent dual-peak pairs can be seen in the transmission spectrum, even though only the symmetrical refractive index modification is introduced.
Sun, Zhongyuan +5 more
core +1 more source
Simultaneous, independent measurement of temperature and strain using a tilted fibre Bragg grating [PDF]
, 2007 A single fibre Bragg grating is used to discriminate between temperature and strain by exploiting the core-cladding mode coupling of a tilted fibre Bragg grating (TFBG).
Ralph P. Tatam +5 more
core +1 more source
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
openaire +4 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
Journal of Chemistry, 2020 A high temperature-sensitive long-period fiber grating (LPFG) sensor fabricated by the local fictive temperature modification is proposed and demonstrated.
Guorui Zhou +11 more
doaj +1 more source
Review of long period fiber gratings written by CO2 laser
, 2010 This paper presents a systematic review of long period fiber gratings (LPFGs) written by the CO2 laser irradiation technique. First, various fabrication techniques based on CO2 laser irradiations are demonstrated to write LPFGs in different types of ...
Yiping Wang, Wang, Yiping
core +1 more source
Fibre grating refractometer sensors for composite process monitoring [PDF]
, 2007 Optimum performance from advanced composites requires careful control of the resin matrix during cure. This is to ensure there are no cure induced voids and to minimise the build up of internal stresses.
Ralph P. Tatam +13 more
core +1 more source
Advanced Electromagnetics, 2018 In this paper, a high sensitivity temperature sensor based on photonic crystal fiber long period grating (PCF-LPG) filled with ethanol is proposed and simulated by full vector finite element method. The relationship between the resonant wavelength shift,
R. Boufenar, M. Bouamar, A. Hocini
doaj +1 more source