Dual-Point Refractive Index Measurements Using Coupled Seven-Core Fibers

Cuando-Espitia, Natanael; Fuentes-Fuentes, Miguel A.; May-Arrioja, Daniel A.; Hernández-Romano, Iván; Martínez-Manuel, Rodolfo; Torres-Cisneros, M.

doi:10.1109/jlt.2020.3022885

Cited by 12 publications

(15 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The coupling coefficient κ was evaluated using core and cladding refractive index of n co = 1.45 and n cd = 1.444. Core diameters of 2 ρ = 9 μm and a center-to-center core separation of d = 11.86 μm were obtained using image processing; these dimensions are within the typical values reported for this type of highly-coupled MCFs 59 , 60 , 63 – 66 . Briefly, we high-contrasted the original image of the SCF, applied edge detection and binarization to find the area of each core.…”

Section: Introductionsupporting

confidence: 72%

“…The parameter can be approximated as while the parameter is defined as: where is the wavelength of light in vacuum and the temperature dependence of has been obviated. In a previous report 66 , we have shown that for constant ambient temperature, the coupling coefficient of an SCF exhibits a linear tendency around NIR wavelengths. Similarly, using Eqs.…”

Section: Discussionmentioning

confidence: 67%

“…For example, highly-coupled seven core fibers (SCFs) 63 , 64 allocate the cores symmetrically within the structure yielding a sinusoidal spectral response, very similar to that obtained from interferometric arrangements 58 , 65 . These spectral features of SCFs have also been demonstrated to be remarkably sensitive for sensing applications 63 , 66 .…”

Section: Introductionmentioning

confidence: 98%

“…Let us now consider the possible configurations of SMF–SCF–SMF devices that may serve for implementing the Vernier effect. We have recently shown that the spectral response of such devices connected in series and parallel can be effectively modeled by the product and addition, respectively, of their individual responses 66 . Furthermore, and in contrast with most interferometric fiber structures, SCF-based fiber devices can be readily implemented in both transmission and reflection configurations.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Vernier effect using in-line highly coupled multicore fibers

Cuando-Espitia

Fuentes-Fuentes

Velázquez-Benítez

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

We demonstrate optical fiber sensors based on highly coupled multicore fibers operating with the optical Vernier effect. The sensors are constructed using a simple device incorporating single-mode fibers (SMFs) and a segment of a multicore fiber. In particular, we evaluated the performance of a sensor based on a seven-core fiber (SCF) spliced at both ends to conventional SMFs, yielding a versatile arrangement for realizing Vernier-based fiber sensors. The SMF–SCF–SMF device can be fabricated using standard splicing procedures and serve as a “building block” for both, reflection and transmission sensing configurations. As demonstrated with our experimental results, the Vernier arrangements can yield a ten-fold increase in sensitivity for temperature measurements compared to a conventional single SMF–SCF–SMF device, thereby confirming the enhanced sensitivity that can be attained with this optical effect. Furthermore, through theoretical analysis, we obtain the relevant parameters that must be optimized in order to achieve an optimal sensitivity for a specific application. Our findings thus provide the necessary guidelines for constructing Vernier-based sensors with all-fiber devices based on highly coupled multicore optical fibers, which constitutes an ideal framework to develop highly sensitive fiber sensors for different applications.

show abstract

Section: Introductionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vernier effect using in-line highly coupled multicore fibers

Cuando-Espitia

Fuentes-Fuentes

Velázquez-Benítez

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…The FFT has been used for several authors to decode the parameters that perturb an interferometic sensor, see for example Refs. [29,[32][33][34]. In our case, the height of the FFT amplitude was correlated with the index of the sample.…”

Section: Refractive Index Sensingmentioning

confidence: 47%

Simultaneous Sensing of Refractive Index and Temperature With Supermode Interference

Flores-Bravo

Fernandez

Lopez

et al. 2021

J. Lightwave Technol.

View full text Add to dashboard Cite

In general, a sensor is used to monitor a single parameter only, and in many cases, a reference sensor is necessary to compensate the effect of temperature. Here, we demonstrate that a single supermode interferometer is capable of monitoring two parameters simultaneously. Said interferometer was fabricated with a segment of strongly coupled multicore fiber fusion spliced at the end of a standard single mode fiber. The free end of the multicore fiber was flat, thus, it behaved as a low reflectivity mirror whose reflection depended on the external refractive index. The reflection spectrum of our supermode interferometer consisted of well-defined periodic maxima and minima whose values and position varied when the interferometer was exposed to refractive index and temperature changes. In the Fourier domain, the changes of the interference pattern can be decoded easily. We demonstrate that the supermode interferometer here proposed can be useful to measure the thermo-optic coefficient of a sample. An important advantage of the device reported here is that the length of the multicore fiber is not determinant on the performance of the sensor. In addition, the device can be reused multiple times.

show abstract

The curvature sensor based on fiber-optic spindle arrays

Zhang

Han

et al. 2022

Optics & Laser Technology

View full text Add to dashboard Cite

Dual-Point Refractive Index Measurements Using Coupled Seven-Core Fibers

Cited by 12 publications

References 59 publications

Vernier effect using in-line highly coupled multicore fibers

Vernier effect using in-line highly coupled multicore fibers

Simultaneous Sensing of Refractive Index and Temperature With Supermode Interference

The curvature sensor based on fiber-optic spindle arrays

Contact Info

Product

Resources

About