Refractive index sensitivity of fiber Bragg grating inscribed in a multimode fiber

Kuhne, Jean Filipe; Oliveira, Valmir de; Kalinowski, Hypolito José; Kamikawachi, Ricardo Canute

doi:10.1109/imoc.2015.7369180

Cited by 1 publication

(1 citation statement)

References 12 publications

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“…Therefore, the multimode gratings have the potential for multipoint hydrogen concentration monitoring or temperature compensating. In addition, the refractive index sensitivity of etched fiber Bragg gratings inscribed in multimode fibers are higher than the one found at etched fiber Bragg grating inscribed in single-mode fibers, due to that greater multimode core diameter enables Bragg gratings to exhibit enhanced sensitivity without requiring further fiber diameter reduction [85].…”

Section: New Structurementioning

confidence: 88%

Recent advancements in optical fiber hydrogen sensors

Zhang

Peng

Qian

et al. 2017

Sensors and Actuators B: Chemical

176

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A review for optical fiber hydrogen sensors based on palladium (Pd) and tungsten oxide (WO 3) thin films is presented, with specific focus on the measurement methods, probe structures, and sensing properties of different sensors. Firstly, the theoretical models behind the optical fiber hydrogen sensors, as well as their practical limitations, are addressed. Secondly, four mainstream measurement methods, including intensity, fiber Bragg grating (FBG), interferometer, surface plasmon resonance (SPR), which have been proposed to sense the physicochemical properties variations of sensitive thin films when exposed to hydrogen, are reviewed. Then, the advantages and disadvantages of all the above measurement methods are also discussed and compared. Finally, the existing problems and future prospects of optical fiber hydrogen sensors are pointed out.

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Section: New Structurementioning

confidence: 88%