Long Period Fiber Grating Humidity Sensor with Gelatin/Cobalt Chloride coating

Panwar, Nishtha; Tiwari, Umesh; Nidhi, -; Khan, Mohd Mansoor; Jain, Subhash C.; Garg, Rajeev; Kapur, Pawan

doi:10.1364/photonics.2012.w2b.4

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…Fiber optic technology is ideal for this application when compared to their electronic equivalent because fiber optic system allows low noise, high bandwidth, high data transmission with low loss. It is also relatively simple to design systems which are immune to electromagnetic interference [4][5][6][7]. Apart from the telecommunication application, for the last few years extensive research and development has been done on optical based fiber sensor in many sensing applications.…”

Section: Introductionmentioning

confidence: 99%

Bragg Grating Diffraction light at Different Wavelength and Incident Light

2019

IJITEE

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The diffraction grating is an important device that makes use of the diffraction of light to produce spectra. Diffraction is also fundamental in other applications such as x-ray diffraction studies of crystals and holography. We proposed a design of Bragg grating waveguide to investigate the behavior of diffraction of light at different incident angle and wavelengths. Using finite difference time domain (FDTD) photonics simulation software the performance of proposed waveguide is observed in term of output power, electric field, diffraction efficiency (DE) and signal to noise ratio (SNR). It is found that the proposed waveguide provides better diffracted light with electric field distribution with 1.969 v/m, Diffraction efficiency 8%, and SNR (25.5 dB) at 1.55µm wavelength and 00 degrees of incident angle

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Section: Introductionmentioning

confidence: 99%

Bragg Grating Diffraction light at Different Wavelength and Incident Light

2019

IJITEE

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“…Another method of chemical sensing is based on the inscription of a long period fibre grating (LPFG) in the optical fibre. LPFGs are sensitive to many parameters like temperature, strain, refractive index of surrounding media and other factors [ 28 , 29 ]. Chemical sensors employing LPFGs must be coated with an analyte-sensitive substance [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

“…Not all of them, however, are suitable for each substance. Humidity levels have been measured by detecting a change of absorption, refractive index or reflectance in interferometers, LPFGs and other structures [ 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the Sensing Coating of the Optical Fibre CO2 Sensor

Wysokiński¹,

Napierała²,

Stańczyk³

et al. 2015

Sensors

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Optical fibre carbon dioxide (CO2) sensors are reported in this article. The principle of operation of the sensors relies on the absorption of light transmitted through the fibre by a silica gel coating containing active dyes, including methyl red, thymol blue and phenol red. Stability of the sensor has been investigated for the first time for an absorption based CO2 optical fiber sensor. Influence of the silica gel coating thickness on the sensitivity and response time has also been studied. The impact of temperature and humidity on the sensor performance has been examined too. Response times of reported sensors are very short and reach 2–3 s, whereas the sensitivity of the sensor ranges from 3 to 10 for different coating thicknesses. Reported parameters make the sensor suitable for indoor and industrial use.

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Long Period Fiber Grating Humidity Sensor with Gelatin/Cobalt Chloride coating

Cited by 2 publications

References 9 publications

Bragg Grating Diffraction light at Different Wavelength and Incident Light

Bragg Grating Diffraction light at Different Wavelength and Incident Light

Study on the Sensing Coating of the Optical Fibre CO2 Sensor

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