Metal coating of fiber Bragg grating and the temperature sensing character after metallization

Li, Yulong; Zhang, Hua; Feng, Yan; Gang, Peng

doi:10.1016/j.yofte.2009.05.001

Cited by 85 publications

(35 citation statements)

References 8 publications

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“…Therefore, it can be considered that the sensitivity is enhanced by not only temperature rise but also thermal strain. Similar enhancement on the sensitivity of an FBG-type device whose periphery a Ni metal thick layer was deposited on has already been reported [27]. Figure 12 represents the calibration curve between the shift in Bragg wavelength and hydrogen concentration.…”

Section: Hydrogen Detection Using the Catalyst Film On The Tisupporting

confidence: 75%

A Robust Fiber Bragg Grating Hydrogen Gas Sensor Using Platinum-Supported Silica Catalyst Film

et al. 2018

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A robust fiber Bragg grating (FBG) hydrogen gas sensor for reliable multipoint-leakage monitoring has been developed. The sensing mechanism is based on shifts of center wavelength of the reflection spectra due to temperature change caused by catalytic combustion heat. The sensitive film which consists of platinum-supported silica (Pt/SiO 2 ) catalyst film was obtained using sol-gel method. The precursor solution was composed of hexachloroplatinic acid and commercially available silica precursor solution. The atom ratio of Si : Pt was fixed at 13 : 1. A small amount of this solution was dropped on the substrate and dried at room temperature. After that, the film was calcined at 500°C in air. These procedures were repeated and therefore thick hydrogen-sensitive films were obtained. The catalytic film obtained by 20-time coating on quartz glass substrate showed a temperature change 75 K upon exposure to 3 vol.% H 2 . For realizing robust sensor device, this catalytic film was deposited and FBG portion was directly fixed on titanium substrate. The sensor device showed good performances enough to detect hydrogen gas in the concentration range below lower explosion limit at room temperature. The enhancement of the sensitivity was attributed to not only catalytic combustion heat but also related thermal strain.

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Section: Hydrogen Detection Using the Catalyst Film On The Tisupporting

confidence: 75%

A Robust Fiber Bragg Grating Hydrogen Gas Sensor Using Platinum-Supported Silica Catalyst Film

et al. 2018

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“…Commonly used is the approach of protecting the optical fibres with metal jackets prior to encapsulation. These metal jackets are typically applied by low temperature processes such as electro-less plating [8] or a mixture of electro-plating and magnetron sputtering [9]. Subsequently, the jacketed fibres are encapsulated either by using low temperature manufacturing processes such as ultrasonic consolidation [10] or by using brazing [11] and high temperature additive manufacturing processes such as fused deposition modelling [9].…”

Section: Introductionmentioning

confidence: 99%

Temperature and Strain Measurements With Fiber Bragg Gratings Embedded in Stainless Steel 316

Havermann

Mathew

MacPherson

et al. 2015

J. Lightwave Technol.

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Single-mode optical fibers with thin nickel coatings (outer diameter ∼350 μm) are successfully embedded into stainless steel (SS) 316 components using bespoke laser-based additive manufacturing technology. In our approach, we manufacture SS 316 components using selective laser melting, incorporating U-shaped grooves with dimensions suitable to hold nickel-coated optical fibers. Coated optical fibers containing fiber Bragg gratings for strain monitoring and temperature sensing are placed in the groove. The embedding is completed by melting subsequent powder layers on top of the fibers. Cross-sectional microscopy analysis of the fabricated components, together with analysis of the Bragg gratings behavior during fabrication indicates a strong substanceto-substance bond between coated fiber and added SS 316 material. Temperature and strain cycling of the embedded sensors demonstrates the ability of gratings to survive the embedding process, and act as sensing elements in harsh environments. In situ strain and temperature measurements from within the component are demonstrated for high dynamic stress levels and elevated temperatures (<400°C).Index Terms-Bragg gratings, embedded fiber sensors, laser melting, laser sintering, optical fiber sensors, stainless steel, strain sensors, temperature sensors. 0733-8724

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“…13 In this section, to illustrate the origin of stress that will show in Sec. 13 In this section, to illustrate the origin of stress that will show in Sec.…”

Section: Methods For Metalization and Common Resultsmentioning

confidence: 99%

Effect of metalizing nickel on the spectrum of fiber Bragg grating

et al. 2013

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Metal coating can provide fiber Bragg grating (FBG) effective protection and improve the FBG sensor's performance in harsh environments. However, the metalizing can impact the optical properties of the FBG. As a result, the sensor accuracy of FBG will lower. The reason for the effect is the stress produced in the metalizing. In this study, we coated the FBG by the electroless-electroplating method. The common changes of the FBG's spectrum after the metalizing were apparent side-lobes and reduced peak loss, and the hysteresis error for temperature sensor was more than 3.5°C. To reduce the deformation of the FBG's spectrum in the metalizing, we analyzed the origin of stress, calculated the FBG's refractive index perturbation due to the thermal stress, and simulated the spectrums of FBG under different stress distributions. On the basis of this, we developed a stress control technology. After using the technology, the optical properties of the metal-coated fiber Bragg gratings have been retained, and their hysteresis errors for temperature sensors were less than 1.5°C. The results showed good repeatability. The study can be used for regulating metalizing processes, and for providing valuable information for metalizing other optical fiber devices.

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Metal coating of fiber Bragg grating and the temperature sensing character after metallization

Cited by 85 publications

References 8 publications

A Robust Fiber Bragg Grating Hydrogen Gas Sensor Using Platinum-Supported Silica Catalyst Film

A Robust Fiber Bragg Grating Hydrogen Gas Sensor Using Platinum-Supported Silica Catalyst Film

Temperature and Strain Measurements With Fiber Bragg Gratings Embedded in Stainless Steel 316

Effect of metalizing nickel on the spectrum of fiber Bragg grating

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