A reflective intensity modulated fiber tilt angle sensor based on an all-photonic crystal fiber interferometer

Zhao, Yong; Li, Xuegang; Cai, Lu

doi:10.1016/j.sna.2016.04.030

Cited by 20 publications

(2 citation statements)

References 15 publications

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“…If the phase difference between the two modes is an integral multiple of π, then the constructive interference of these modes occurs. Particularly, the resonant dips of the interference spectrum are generated when the phase difference is an odd multiple of π [ 22 ], namely

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Section: Structure and Principle Of Sensormentioning

confidence: 99%

A New Hydrogen Sensor Based on SNS Fiber Interferometer with Pd/WO3 Coating

Shao

Xie

Song

2017

Sensors

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This paper presents a new hydrogen sensor based on a single mode–no core–single mode (SNS) fiber interferometer structure. The surface of the no core fiber (NCF) was coated by Pd/WO3 film to detect the variation of hydrogen concentration. If the hydrogen concentration changes, the refractive index of the Pd/WO3 film as well as the boundary condition for light propagating in the NCF will all be changed, which will then cause a shift into the resonant wavelength of interferometer. Therefore, the hydrogen concentration can be deduced by measuring the shift of the resonant wavelength. Experimental results demonstrated that this proposed sensor had a high detection sensitivity of 1.26857 nm/%, with good linearity and high accuracy (maximum 0.0055% hydrogen volume error). Besides, it also possessed the advantages of simple structure, low cost, good stability, and repeatability.

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…”

Section: Structure and Principle Of Sensormentioning

confidence: 99%

A New Hydrogen Sensor Based on SNS Fiber Interferometer with Pd/WO3 Coating

Shao

Xie

Song

2017

Sensors

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“…However, the above rotational sensors are based on the conventional sensing method. The alternative approach to the developed rotational sensor is based on fiber-optics [ 36 , 37 , 38 , 39 , 40 ]. Among the different sensor designs, Azmi et al [ 41 ] presented a rotational and dynamic bending sensor using seven core fibers based on coherence interferometry, where they achieved a sensitivity of 6.2 fringe/° and the range was 360°.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Rotational Sensor Using Polymer Optical Fiber for Robot Movement Assessment Based on Intensity Variation

Shi

Ghaffar

et al. 2022

Polymers

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A complex signal processing technique is usually required to process the data in most sensor design structures, and integration into real applications is also challenging. This work presents a dynamic rotational sensor using polymethyl methacrylate (PMMA) fiber for robot movement assessment. The sensor design structure is based on the coupling of light intensity, in which two PMMA fibers are twisted together. Both fibers are bent after twisting and attached on the linear translation stage, which is further attached to the robot. The variation in bending radius causes the bending loss, and that loss is coupled in the second fiber. The change in the macro-bend radius corresponds to the rotation of the robot. Experimental results indicate that the sensor can operate in full rotational cycle (i.e., 0°–360°) as well as for clock and anti-clockwise rotation. Moreover, different rotational speeds (2°/s, 3°/s, 5°/s, and 10°/s) were carried out. The hysteresis loss of the sensor was about 0.77% and the sensitivity was 8.69 nW/°. The presented dynamic rotational sensor is cost-effective and easily integrated into the robot structure to analyze the robot’s circular motion.

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