Designing of Highly Sensitive Fiber Bragg Grating Based Volume Refractive Index Sensors for Biochemical applications

Bahattacharya, Archita; Gangopadhyay, Malay; Bandyopadhyay, Sankhyabrata

doi:10.1109/iemcon.2018.8614877

Cited by 3 publications

(2 citation statements)

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“…The design strategy of optical fiber grating-based sensors with the effect of mode transition of cladding modes [15]- [17] needs to be optimized as per the order of the cladding modes because it has been observed that the MT behavior of comparative higher-order mode is different from that of lower-order cladding modes. It has been proved and reported earlier that the mode stretching effect can enhance the volume RI sensitivity of the lower-order cladding mode of FBG [26]. In this work, the effect of mode stretching on add-layer sensitivity of cladding modes has been discussed elaborately.…”

Section: Numerical Resultsmentioning

confidence: 66%

“…A detail investigation of volume RI sensitivity of cladding mode was reported earlier. In this previous work, the sensitivity of the respective cladding modes was enhanced with the effect of mode transition and mode stretching [26]. Sensitivity can be enhanced further by adjusting the operating wavelength of cladding mode at higher resonance wavelength which was illustrated earlier in case of long-period fiber sensors.…”

Section: Numerical Resultsmentioning

confidence: 67%

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Employing Higher Order Cladding Modes of Fiber Bragg Grating for Analysis of Refractive Index Change in Volume and at the Surface

et al. 2020

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In this work, a detailed study on volume and surface refractive index (RI) sensitivity of cladding modes for a fiber Bragg grating (FBG) based sensor is presented. Surface RI sensitivity of the cladding mode of FBGs has been illustrated and quantified with the concept of add-layer sensitivity for the first time to the best of our knowledge. A detailed investigation of mode transition of higher-order cladding modes has been revisited and important characteristics of the cladding modes are observed which could open a new designing path of fabrication and innovative way of the use of this family of optical fiber grating-based sensors. The effect of "mode transition" of higher-order cladding modes, higher operating wavelength for respective cladding mode and "mode stretching" effects are combined together to achieve higher volume and surface RI sensitivity of cladding mode of FBG. It has been shown numerically that with proper designing, sub-nanometer (∼0.04 nm) attachment of target analyte could be recognized by cladding mode of FBG which is quite promising for application in optical fiber grating bio-sensors. This critical designing method of FBG based surface refractometer would be very helpful in case of the fabrication of highly sensitive sensors for distinct biochemical applications.

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Section: Numerical Resultsmentioning

confidence: 66%

Section: Numerical Resultsmentioning

confidence: 67%