A fiber-optic evanescent-wave hydrogen gas sensor using palladium-supported tungsten oxide

Sekimoto, S.; Nakagawa, Hidemoto; Okazaki, Shinji; Fukuda, K.; Asakura, Shukuji; T, Shigemori; Takahashi, S.

doi:10.1016/s0925-4005(00)00330-0

Cited by 177 publications

(102 citation statements)

References 5 publications

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“…Furthermore, significantly valuable characteristics such as explosion proof and immunity to electromagnetic noise are noteworthy for practical applications. Many types of optical fiber hydrogen sensors have been proposed, including evanescent wave absorption devices [9,10], micromirror optode [11,12], Mach-Zehnder interferometers [13], surface plasmon resonance (SPR) devices [14], and fiber Bragg gratings (FBG) [15][16][17]. Among them, the fiber-optic sensor based on evanescent wave absorption is able to detect the leakage point by time-domain reflectometry using light pulse technique [18].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

et al. 2018

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“…When the hydrogen in the confined space accumulated to a certain concentration, it may be a great threat to human life [1][2] . Several kinds of optical fiber hydrogen sensors, such as micro-mirror sensor, evanescent sensor, surface plasmon resonance sensor, acoustic resonator sensor and fiber Bragg grating sensor, have been proposed in recent years [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

Study on Reflection Times of Fiber Optic Hydrogen Sensor with Multiple Reflections

Deng¹,

Yong²,

Zhou³

et al. 2018

Proceedings of the 2nd International Forum on Management, Education and Information Technology Application (IFMEITA 2017)

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“…At present there are several kinds of optical fiber hydrogen sensors, such as evanescent sensor [1][2][3][4][5][6], micro-mirror sensor [7][8], surface plasmon resonance (SPR) sensor [9], acoustic resonator sensor [10], and fiber Bragg grating (FBG) sensor [11][12][13][14]. Although the evanescent and micro-mirror sensors are simple and inexpensive, their multiplexing capability is quite limited.…”

Section: Introductionmentioning

confidence: 99%

“…It is found that WO 3 /Pd composite film has good mechanical property [6]. To get good mechanical property and high sensitivity thin film, WO 3 -Pd composite film were deposited on SP-FBG to overcome the mismatch of material properties of the hydrogen sensitive film and SiO 2 . One shortcoming of the FBG coated with thin Pd film is that this kind of FBG is easily suffered from pure Pd film's fatal fracture caused by its α-β phase transition.…”

Section: Introductionmentioning

confidence: 99%

“…In order to prepare hydrogen sensor with good performance, novel hydrogen sensor combined with SP-FBG and Pd/Ag composite films, WO 3 A Lambda Physik excimer laser (COMPex-150T) operating at 248 nm was used as laser source to write FBG in SMF-28 by the phase mask method [20][21]. The optical cladding of the FBG fiber was mechanically ground by a motor-driven polishing wheel [22] and polished to about several micro-meters of minimal residual thickness near the fiber core.…”

Section: Introductionmentioning

confidence: 99%

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Review on optical fiber sensors with sensitive thin films

Yang

Dai

2011

Photonic Sens

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Abstract:The combination of fiber optics with nano-structure technologies and sensitive thin films offers great potential for the realization of novel sensor concepts. Miniatured optical fiber sensors with thin films as sensitive elements could open new fields for optical fiber sensor applications. Thin films work as sensitive elements and transducer to get response and feedback from environments, in which optical fibers are employed to work as signal carrier. This article presents some research work conducted at the National Engineering Laboratory for Optical Fiber Sensing Technologies in recent years. Concrete examples are: Pd/WO 3 co-sputtered coating as sensing material for optical hydrogen sensors shows robust mechanical stability and meanwhile good sensing performance; TbDyFe magnetostrictive coating directly deposited on fiber Bragg grating (FBG) demonstrates its possibility of miniature optical magnetic field/current sensors, and 40-pm shift of the FBG wavelength happens at a magnetic field order of 50 mT.

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A fiber-optic evanescent-wave hydrogen gas sensor using palladium-supported tungsten oxide

Cited by 177 publications

References 5 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

Study on Reflection Times of Fiber Optic Hydrogen Sensor with Multiple Reflections

Review on optical fiber sensors with sensitive thin films

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