Passive Temperature-Compensating Technique for Microstructured Fiber Bragg Gratings

Huy, Minh Châu Phan; Laffont, Guillaume; Dewynter, Véronique; Ferdinand, Pierre; Pagnoux, Dominique; Dussardier, Bernard; Blanc, Wilfried

doi:10.1109/jsen.2008.926169

Cited by 11 publications

(5 citation statements)

References 19 publications

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“…In Ref. 174, Bragg gratings were inscribed in MOF and subsequently reduced thermal variation in Bragg wavelength. Temperature was compensated by adding a liquid of refractive index having appropriate thermal dependence in the holes of MOF.…”

Section: Temperature Compensation Techniques In Fbgmentioning

confidence: 99%

Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review

2020

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Fiber Bragg grating has embraced the area of fiber optics since the early days of its discovery, and most fiber optic sensor systems today make use of fiber Bragg grating technology. Researchers have gained enormous attention in the field of fiber Bragg grating (FBG)-based sensing due to its inherent advantages, such as small size, fast response, distributed sensing, and immunity to the electromagnetic field. Fiber Bragg grating technology is popularly used in measurements of various physical parameters, such as pressure, temperature, and strain for civil engineering, industrial engineering, military, maritime, and aerospace applications. Nowadays, strong emphasis is given to structure health monitoring of various engineering and civil structures, which can be easily achieved with FBG-based sensors. Depending on the type of grating, FBG can be uniform, long, chirped, tilted or phase shifted having periodic perturbation of refractive index inside core of the optical fiber. Basic fundamentals of FBG and recent progress of fiber Bragg grating-based sensors used in various applications for temperature, pressure, liquid level, strain, and refractive index sensing have been reviewed. A major problem of temperature cross sensitivity that occurs in FBG-based sensing requires temperature compensation technique that has also been discussed in this paper.

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Section: Temperature Compensation Techniques In Fbgmentioning

confidence: 99%

Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review

2020

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“…For example, Naeem et al were able to achieve a modest change in temperature sensitivity using methanol-filled holes [26]. Alternatively, Huy et al showed plots with flattened temperature response over a limited temperature range but did not show spectra for the filled fibres [27].…”

Section: Introductionmentioning

confidence: 99%

Fibre Bragg gratings with micro-engineered temperature coefficients

Fells,

Song,

Wang

et al. 2024

Preprint

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Fibre Bragg gratings (FBGs) are ubiquitous as sensors for a range of parameters and also as optical components in telecommunications systems. However, their temperature dependence of around + 10 pm/°C is a limiting factor, making it challenging for sensors to discriminate strain from temperature, while telecommunications components require additional thermal stabilization. We microfabricate low loss FBGs in standard single-mode fibre, with wide control over their temperature coefficient between + 10 pm/°C and − 55 pm/°C. We also show a temperature insensitive FBG which is stable to ± 12.5 pm over a 17 to 45°C range, which is an order of magnitude reduction in sensitivity. It has only ± 3.5% reflectivity variation over this range and only 1.29 dB transmission loss. The large negative coefficient FBGs would find application in separating strain and temperature effects, as well as for thermally tunable components. Separately, the temperature insensitive FBG would have applications for strain sensing with low temperature cross-sensitivity as well as for low-cost temperature stable optical components. Moreover, the microfabrication process developed has significant potential for new classes of sensor and tunable optical devices.

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“…Thermal factor in particular has a two-fold effect on the PBG in the form of structural and RI variation in the PC layers arising from thermal expansion and thermo optic effects respectively. Temperature compensating techniques [15][16][17] are then a crucial aspect to consider in the design of applications such as wavelength division multiplexing (WDM) [18], narrow bandwidth filters [19] or sensors requiring precise error free measurements [20,21].…”

Section: Introductionmentioning

confidence: 99%

Thermal and Layer Thickness Dependence of Defect and Band Edge Transmissions in 1D PCs Based on ZnS/CaF₂ Multilayers

Shilpa

Abhinaya

Yamuna

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Alternating layers of different materials with sub wavelength thickness in one dimension are used for controlling the propagation of electromagnetic waves owing to their ability to selectively transfer and confine photons of specific wavelengths, called photonic band gap (PBG). Temperature independent large PBG in the visible wavelength range is highly desired for many applications and we have theoretically investigated the thermal and layer thickness dependence on PBG and proposed a novel strategy to choose materials based on their coefficients of thermal expansion and thermo optic effect. The thermal dependence of PBG can be eliminated by making the spectral shift due to thermo optic effect equal and opposite to that of the thermal expansion effect. We have chosen ZnS/CaF2 multilayers for the design of 1D photonic crystal (PC) and our calculations have shown that the spectral shift due to thermal fluctuations could be significantly reduced by the negative thermo optic coefficient of these materials compensated by the positive thermal expansion coefficient. The proposed 1D PC shows a temperature dependent spectral shift of ∼14 pm/oC in the visible range.

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Passive Temperature-Compensating Technique for Microstructured Fiber Bragg Gratings

Cited by 11 publications

References 19 publications

Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review

Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review

Fibre Bragg gratings with micro-engineered temperature coefficients

Thermal and Layer Thickness Dependence of Defect and Band Edge Transmissions in 1D PCs Based on ZnS/CaF₂ Multilayers

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Passive Temperature-Compensating Technique for Microstructured Fiber Bragg Gratings

Cited by 11 publications

References 19 publications

Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review

Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review

Fibre Bragg gratings with micro-engineered temperature coefficients

Thermal and Layer Thickness Dependence of Defect and Band Edge Transmissions in 1D PCs Based on ZnS/CaF2 Multilayers

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Thermal and Layer Thickness Dependence of Defect and Band Edge Transmissions in 1D PCs Based on ZnS/CaF₂ Multilayers