A reliable, sensitive and fast optical fiber hydrogen sensor based on surface plasmon resonance

Abstract

Abstract:We report for the first time on the experimental response of a Surface Plasmon Resonance fiber optic sensor based on wavelength modulation for hydrogen sensing. This approach of measuring the hydrogen concentration makes the sensor insensitive to intensity fluctuations. The intrinsic fiber sensor developed provides remote sensing and enables the possibility of multi-points sensing. The sensor consists of a multilayer of 35 nm Au / 180 nm SiO 2 / Pd deposited on a step-index multimode fiber core. The sensitivity and selectivity of the sensor are optimal at a Pd thickness of 3.75 nm. The sensor is sensitive to a hydrogen concentration ranging between 0.5 and 4% H 2 in Ar, with a response time less than 15 s.

Review on hydrogen leak detection: comparison between fiber optic sensors based on different designs with palladium

“…One direction to investigate this subject can be to study the SPR effect [49][50][51][52] and the use of NPs for example. In this direction, several potential possibilities to design these NPs systems have been and are investigated: pure Pd NP used with different properties (shape) or core shell systems (Pd-Au for example).…”

Metal hydrides for smart window and sensor applications

“…44 In Bevenot's study, the hydrogen concentration is detected by measuring the change in intensity of light transmitted through an optical fi ber for a specifi c light input angle and wavelength. Perrotton et al 45 showed that an optical response can also be obtained upon collective excitation, thus allowing for a very simple optical fi ber layout. Moreover, the resonance frequency can be tuned by replacing the Pd layer with a Au/SiO 2 /Pd stack and varying the SiO 2 thickness.…”

“…Moreover, the resonance frequency can be tuned by replacing the Pd layer with a Au/SiO 2 /Pd stack and varying the SiO 2 thickness. 45 In this way, several points of measurement may be obtained in a single fi ber (see Figure 6 ). In principle, the same layout can be used when replacing Pd with, for example, a Mg/Pd stack.…”

Numerical investigation into a surface plasmon resonance sensor based on optical fiber microring

“…The SPR optical fiber sensors have board applications in biology, environment, chemistry, medicine, etc. [3][4][5][6][7][8]. Over the past decade, many fiber-based SPR sensors have been reported [9][10][11][12][13][14], including sensors based on side-polished fiber, D-type fiber, tapered fiber, and fiber Bragg gratings.…”