Long period grating (LPG)
Application of long-period-grating sensors to respiratory plethysmography
... nine long-period-grating- based curvature sensors on a garment are used to monitor the thoracic and abdominal movements of a human during respi- ...
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On the Validity of the Effective Index Method for Long Period Grating Photonic Crystal Fibers
... The development of long-period grating (LPG) has had a significant impact on fiber optic sensing. It is known that the spectral response of LPG is sensitive to local envi- ronment such as ...
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Highly sensitive volatile organic compounds vapour measurements using a long period grating optical fibre sensor coated with metal organic framework ZIF 8
... Fibre-optic sensing platforms are small, lightweight, immune to electromagnetic interference and as such can be used in extreme conditions, enabling remote real time monitoring with no electrical power needed at the ...
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Optical fibre long period grating gas sensor modified with metal organic framework thin films
... There have been limited reports of MOF based sensors, but they indicate their potential to become powerful analytical devices [1]. The main advantage is high chemical selectivity possible by the appropriate selection of ...
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Optical fibre long period grating gas sensor modified with metal organic framework thin films
... fibre long period grating (LPG) modified with a thin film of ZIF-8, a zeolitic immidazol frame- work material and a subgroup of metal organic framework family, was employed for the detection of organic ...
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Optical characterisation of a long period grating using liquid droplets on an electrowetting-on-dielectric platform
... In this paper we present measurements of the optical transmission characteristics of an unbroken fibre-optofluidic device in which a fluid droplet interacts with light propagating in a single mode fibre incorporating a ...
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Graphene oxide coated long period grating based fibre optic humidity sensor
... In this paper, the response of a graphene oxide (GO) coated long period grating (LPG) to the change in temperature and in humidity is reported. To create the probe, an improved Hummer’s method was ...
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Long period grating in multicore optical fiber:an ultra-sensitive vector bending sensor for low curvatures
... Long Period Grating (LPG) is a large scale (10 µm to 1 mm) periodic perturbation of the refractive index of the core of a photosensitive single mode optical fiber ...
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Sensing characteristics of a novel two-section long-period grating
... fiber long-period grating 共 LPG 兲 is an axially peri- odic refractive-index variation with a period of typi- cally a few hundred micrometers inscribed in the core of a photosensitive ...
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The application of a long period grating sensors to human respiratory plethysmography
... addressed by using a sensor array [6], however the solution relies heavily on model based signal processing. The cost and realisation of a sufficiently dense array of magnetometers is prohibitive. Whilst the ORP methods ...
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Graphene oxide coated long period grating for optical sensing purposes
... Citation: Dissanayake, K. P. W., Vidakovic, M., Matthias, F., Sun, T. ORCID: 0000-0003- 3861-8933 and Grattan, K. T. V. ORCID: 0000-0003-2250-3832 (2019). Graphene oxide coated long period grating ...
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A long period grating optical fiber sensor with nano assembled porphyrin layers for detecting ammonia gas
... 13. S. Korposh, T. Wang, S. James, R. Tatam, S.-W. Lee, Pronounced aromatic carboxylic acid detection using a layer-by-layer mesoporous coating on optical fibre long period grating, Sensors and ...
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Respiratory monitoring using fibre long period grating sensors
... fibre long period grating curvature sensors on a garment, used to monitor the thoracic and abdominal volumetric tidal movements of a human ...upon long period gratings written in a ...
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Graphene oxide-coated Long Period Grating-based fibre optic sensor for relative humidity and external refractive index
... oxide-coated long period grating-based sensor to changes in relative humidity and external refractive index (as well as temperature to provide a correction for any changes) is ...functionalized ...
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Volatile organic compounds sensing with use of fibre optic sensor with long period grating and mesoporous nano scale coating
... of grating period, grating strength and optical thickness of the film such that the resonance band lies at the PMPT, while the thickness of the coating also ensures that the device is operating at ...
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Carbon dioxide measurements using long period grating optical fibre sensor coated with metal organic framework HKUST 1
... The evolution of the transmission spectrum of the LPG with period of 110.0 µm during the HKUST-1 deposition process is shown in Figure S2. After the immersion of LPG into the mother solution (Phase 1) the change ...
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Bending and orientational characteristics of long period gratings written in D-shaped optical fiber
... FIBER long period grating (LPG) is an axially periodic refractive index variation inscribed in the core of a pho- tosensitive single-mode optical fiber by ultra-violet irradiation, which couples ...
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Cardiac-induced localized thoracic motion detected by a fiber optic sensing scheme
... An optical fiber long period grating (LPG) curvature sensing scheme with a response time of 0.0185 s (data acquisition rate of 54 Hz) is presented in this paper and it is demonstrated that this ...
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Design and characterisation of long period grating (LPG) - based optical fibre sensors for acoustic wave detection
... Most reported intensity modulated acoustic sensors are using a simple and low cost sensor interrogation. Generally the sensor only requires a light source and a photodetector to detect the light intensity variations due ...
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Long period fibre grating as gas sensor for environmental pollution monitoring
... The long period grating sensor (LPG) is a variation on the fibre Bragg grating (FBG) sensor, and as its name suggests differs in construction from the FBG by the length of the grating ...
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