Practical coupling device based on a two-core optical fiber

Vallée, Réal; Drolet, Denis

doi:10.1364/ao.33.005602

Cited by 26 publications

(8 citation statements)

References 16 publications

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“…In bi-core fiber (BCF) sensing devices, two types of launching conditions are normally considered. Most studies [19,20] refer to launching light in one fiber core only and determining the effects of evanescence mode coupling over the space left between the two cores, generally a fraction of the fiber cores radius. The other possibility is central launching, the one that will be analyzed here.…”

Section: Light Excitation Of Bi-core Fibersmentioning

confidence: 99%

Bi-core optical fiber for sensing of temperature, strain and torsion

Ribeiro

Silva

Frazão

et al. 2019

Meas. Sci. Technol.

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Bi-core optical fiber structures are studied for applications in sensing. In this paper, an analysis is performed on the spectral characteristics of light propagating in these fibers with central launching core illumination from a standard single mode fiber. Reflective and transmissive configurations are addressed. The characteristics of a reflective bi-core fiber structure for measurement of strain, temperature and absolute value of torsion are investigated and highlights for further research are presented.

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Section: Light Excitation Of Bi-core Fibersmentioning

confidence: 99%

Bi-core optical fiber for sensing of temperature, strain and torsion

Ribeiro

Silva

Frazão

et al. 2019

Meas. Sci. Technol.

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“…2, and h(z) is the twisting angle along the fiber axis Z. The variations of the index by bending can be expressed as [11] dn(m)&dn x (m)&dn y (m)&{c 2 n 3 2…”

Section: Theory Model Of Sensormentioning

confidence: 99%

Four-core fiber-based bending sensor

Zhao

Wang

Yuan

2008

Front. Optoelectron. China

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A novel four-core fiber-based bending sensor has been proposed. The four-core fiber is used as the sensing element, the four cores of the fiber act as a four-beam interferometer, and the far-field interferogram grids with periodical distributions are formed on the fiber output end. Since the phase difference is a function of the radius of curvature, the change of the radius of curvature shifts the far-field interferometric grid pattern. A low-coherence laser diode with wavelength of 650 nm is adopted to illuminate the fiber, and the interferogram pattern in the farfield is recorded by a CCD camera. The relationship between the far-field grid pattern intensity distribution and the radius of curvature is established theoretically and confirmed experimentally.

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“…For a fused silica fiber, the variations of the refractive indices can be derived as [9] R d n c n n 2…”

Section: Analysis Of Micro-bending Beam Systemmentioning

confidence: 99%

Fiber optic flow velocity sensor based on an in-fiber integrated Michelson interferometer

Yuan

Liu

2008

SPIE Proceedings

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A novel fiber optic flow velocity sensor based on a twin-core fiber Michelson interferometer has been proposed and demonstrated. The sensor only is a segment of twin-core fiber acting as cylinder cantilever beam. The force exerted on the cylinder by the flow of a fluid with unknown velocity bends the fiber, which corresponding to the shift of the phase of the twin-core in-fiber integrated Michelson interferometer. This twin-core fiber sensing technique could automatically compensate the variation of environmental temperature and pressure due to both arms of the interferometer would be affected equally by such changes.

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Practical coupling device based on a two-core optical fiber

Cited by 26 publications

References 16 publications

Bi-core optical fiber for sensing of temperature, strain and torsion

Bi-core optical fiber for sensing of temperature, strain and torsion

Four-core fiber-based bending sensor

Fiber optic flow velocity sensor based on an in-fiber integrated Michelson interferometer

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