Core-cladding mode resonances of long period fiber grating in concentration sensor

Akki, Jyoti F.; Lalasangi, Anandkumar S.; Raikar, Prasad; Srinivas, T.; Laxmeshwar, Lata S.; Raikar, U. S.

doi:10.9790/4861-0434146

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…Wavelengthbased sensors can be developed using long-period grating (LPG), FBG, polymer-based optical fiber, microstructured optical fiber, Fabry-Perot interferometer, Michelson interferometer, and Mach-Zehnder interferometer [19]. Of these, FBGs, LPGs, and etched FBGs are sensitive to the refractive index (RI) changes in the medium [8,9,[20][21][22]. Thus, they are used as RI sensors and also as chemical concentration sensors to detect the adulterations in different liquids.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesized CuO nanoparticles–coated grating sensors for temperature measurement

Bendigeri,

Kulkarni,

Jadhav

et al. 2024

Meas. Sci. Technol.

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In the present report we demonstrate temperature sensing using fiber Bragg grating fixed on a Teflon substrate, which has a large thermal expansion coefficient. The significant enhancement in the sensitivity has been achieved by coating the fiber with green synthesized copper oxide nanoparticles characterized by UV-Visible spectroscopy, SEM, DSC and other techniques. The behavior of the coated material is unique in its response to the thermal stability based on mode of coating. We have explored the thermal response of FBG sensor mounted on the temperature unit on and after coating. The designed sensor is compact, cost effective and measures temperatures in the range of 25 0C to 200 0C. It has showed a linear relationship between wavelength shift and temperature change along with 0.59 pm / oC enhancement in the sensitivity. However, by optimizing the materials and physical dimensions of FBG, it is possible to increase the range of temperature detection thereby improving the performance of sensor. It is observed that sensitivity of the nanoparticles- coated FBG is better than that of the bare FBG for all ranges of temperature.

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Section: Introductionmentioning

confidence: 99%

Biosynthesized CuO nanoparticles–coated grating sensors for temperature measurement

Bendigeri,

Kulkarni,

Jadhav

et al. 2024

Meas. Sci. Technol.

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“…LPFGs, in contrast, couple energy co-directionally. Energy from the forward propagating incident modes is transferred to either forward propagating cladding or radiation modes depending on the structure of the waveguide [2]. The light transmitted thought the LPFGs coupled to the cladding modes, result in several attenuation bands in the transmitted spectrum, where each one corresponds to a specific cladding mode [3,4].…”

Section: Introductionmentioning

confidence: 99%

Improved long period fibre gratings sensing devices coated with thin films

Coelho

Almeida

Santos

et al. 2017

OCEANS 2017 - Aberdeen

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Long period fibre gratings (LPFG) have found an increasing interest due to the easy fabrication in any kind of fibre through the induced electric arc technique with low cost and flexibility. They have been used in applications such as gainflattening and band-rejection, and for sensing strain, temperature and chemical and biological parameters. The sensitivity of LPFG increases when the fibre is coated with certain thin films. In this short review it is presented the recent developments and applications of these kind of sensors.

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“…As a result, optical fiber sensors are widely used in various applications [1]. Long-period fiber grating (LPFG) couples a core mode to a cladding mode.…”

Section: Introductionmentioning

confidence: 99%

“…Optical fiber sensors have many advantages, such as immunity to electromagnetic interference, low power consumption, corrosion resistance, high temperature resistance, and being lightweight. As a result, optical fiber sensors are widely used in various applications [ 1 ]. Long-period fiber grating (LPFG) couples a core mode to a cladding mode.…”

Section: Introductionmentioning

confidence: 99%

Notched Long-Period Fiber Grating with an Amine-Modified Surface Nanostructure for Carbon Dioxide Gas Sensing

Chiang

2015

Materials

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This paper presents the fabrication and application of a notched long-period fiber grating (NLPFG) with an amine-modified surface nanostructure for carbon dioxide (CO2) gas sensing. The NLPFG with the modified surface nanostructure was fabricated by using inductively coupled plasma (ICP) etching with an Ag nanoparticle etching barrier. The experimental results show that the spectra were changed with the CO2 gas flow within 12 min. Thereafter, the spectra of the NLPFG remained steady and unchanged. During the absorption process, the transmission loss was decreased by approximately 2.019 dB, and the decreased rate of transmission loss was 0.163 dB/min. The sensitivity was about −0.089 dB/%. These results demonstrate that the NLPFG CO2 gas sensor has the advantages of steady performance, repeatability, and low cost. Therefore, the NLPFG can be utilized as a reliable CO2 gas sensor.

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Core-cladding mode resonances of long period fiber grating in concentration sensor

Cited by 8 publications

References 15 publications

Biosynthesized CuO nanoparticles–coated grating sensors for temperature measurement

Biosynthesized CuO nanoparticles–coated grating sensors for temperature measurement

Improved long period fibre gratings sensing devices coated with thin films

Notched Long-Period Fiber Grating with an Amine-Modified Surface Nanostructure for Carbon Dioxide Gas Sensing

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