Nondestructive index profiling of long period gratings in photonic crystal fibres

Petrović, Jovana; Webb, David J.; Mezentsev, Vladimir; Dobb, Helen L.; Kalli, Kyriacos; Bennion, I.

doi:10.1007/s11082-006-9026-8

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…It can be observed that the resonances of arc-induced gratings are located at shorter wavelengths, which can be attributed to the changes caused by the arc in terms of a reduction of the average core diameter and also due to annealing of intrinsic stresses that lead to a change of the refractive index of the core and cladding regions, as discussed previously. As far as the inscription of LPFGs in photonic crystal fibers is concerned this topic is discussed, for instance, in [11,37].…”

Section: Mechanisms Of Gratings Formationmentioning

confidence: 99%

Arc-Induced Long Period Fiber Gratings

Rego

2016

Journal of Sensors

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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. Since then, important achievements have been reached such as the identification of the mechanisms responsible for gratings formation, the type of symmetry, the conditions to increase fabrication reproducibility, and their inscription in the turning points with grating periods below 200 μm. Several interesting applications in the sensing area, including those sensors working in reflection, have been demonstrated and others are expected, namely, related to the monitoring of extreme temperatures, cryogenic and high temperatures, and high sensitivity refractometric sensors resulting from combining arc-induced gratings in the turning points and the deposition of thin films in the transition region. Therefore, due to its pertinence, in this paper we review the main achievements obtained concerning arc-induced long period fiber gratings, with special focus on the past ten years.

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Section: Mechanisms Of Gratings Formationmentioning

confidence: 99%

Arc-Induced Long Period Fiber Gratings

Rego

2016

Journal of Sensors

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“…27). LPGs in two different types of PCF have been investigated for their sensitivity to temperature, bending, surrounding refractive index, and strain [48][49][50][51][52]. Both fibers show negligible temperature sensitivity (<6 pm/ ℃ ) whilst having significant sensitivity to other measurands.…”

Section: Electric Arc Lpgs As Bend Sensorsmentioning

confidence: 99%

Research at the University of Kent and subsequent research activities

Kalli

2011

Photonic Sens

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The author's research activities undertaken at the Applied Optics Group, the University of Kent at Canterbury are reviewed, during his time there from 1988-1992 and 1994-1996, followed by a summary of recent research. The areas of interest are high finesse ring resonators, tunable optical filters, novel optical fiber grating sensors in glass and polymer, femtosecond laser inscription and micromachining, environmental pollution monitoring, hydrogen activated Pd films on silicon and impurity measurement on silicon wafers.

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“…The change in the refractive index of PCF exposed to the electric arc was not known at the time of the calculation hence the model was based on the unperturbed fibre. Later consideration, [27], showed that the index change is of the order of 4 10 − , which may lead to the error in the wavelength shift Λ ∆ ∂ ∂ = ∆ n n n eff δ λ of the order of 0.1nm corresponding to the error in sensitivity of several percents. The model can be improved by taking into account the strain distribution from Fig.…”

Section: Lpg Sensitivity To Strainmentioning

confidence: 99%

“…The model can be improved by taking into account the strain distribution from Fig. 6 and the estimate of the index change from [27]. This work is in progress.…”

Section: Lpg Sensitivity To Strainmentioning

confidence: 99%

Numerical modeling of sensors based on long period gratings in photonic crystal fibres

Petrovic

Dobb

Mezentsev

et al. 2007

Photonic Crystal Fibers

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A numerical model of the sensitivity of long period gratings fabricated by electric-arc in photonic crystal fibres to strain, temperature and refractive index is proposed and evaluated by comparison to the experimental results. It is shown to be superior to the commonly used semi-analytical method. The generalized modelling procedure is thoroughly explained in order to facilitate its application to a wide range of long period gratings in different types of fibres.

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Nondestructive index profiling of long period gratings in photonic crystal fibres

Cited by 5 publications

References 12 publications

Arc-Induced Long Period Fiber Gratings

Arc-Induced Long Period Fiber Gratings

Research at the University of Kent and subsequent research activities

Numerical modeling of sensors based on long period gratings in photonic crystal fibres

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