Ultra-Sensitive Fiber Optic Gas Sensor Using Graphene Oxide Coated Long Period Gratings

Mandeep Singh; Sanjeev Kumar Raghuwanshi; Om Prakash

doi:10.1109/LPT.2019.2932764

Ultra-Sensitive Fiber Optic Gas Sensor Using Graphene Oxide Coated Long Period Gratings

Mandeep Singh, Sanjeev Kumar Raghuwanshi, Om Prakash

Department of Electronics and Communication Engineering, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

28 Citations (SciVal)

Abstract

In this letter, we develop two types of refractive index based sensors using single-mode fiber (SMF-28) to sense hazardous toxic gases in underground mines. The first sensor design is simply a graphene-oxide (GO) deposited long period grating (LPG) and second sensor consist of two LPGs with an interspacing distance of 1 cm (Δl) acting as Mach-Zehnder interferometer (MZI). In addition, we also confirm GO deposition on the SMF using ultraviolet-visible spectroscopy, atomic force microscopy (AFM), and field emission scanning electron micrograph (FESEM). Our experiment results show that the sensitivity of two-LPGs based fiber optic sensor (S_LPG-2 = 76.32 dB/RIU) is higher as compared to the single LPG sensor (S_LPG-1 = 54.65 dB/RIU). Hence, reported graphene oxide deposited long period grating sensor possess better sensitivity and can detect maximum 1.52× 10^-5 index variation in the optical telecommunication band.

Original language	English
Article number	8786126
Pages (from-to)	1473-1476
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	31
Issue number	17
DOIs	https://doi.org/10.1109/LPT.2019.2932764
Publication status	Published - 01-09-2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/LPT.2019.2932764

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abstract = "In this letter, we develop two types of refractive index based sensors using single-mode fiber (SMF-28) to sense hazardous toxic gases in underground mines. The first sensor design is simply a graphene-oxide (GO) deposited long period grating (LPG) and second sensor consist of two LPGs with an interspacing distance of 1 cm (Δl) acting as Mach-Zehnder interferometer (MZI). In addition, we also confirm GO deposition on the SMF using ultraviolet-visible spectroscopy, atomic force microscopy (AFM), and field emission scanning electron micrograph (FESEM). Our experiment results show that the sensitivity of two-LPGs based fiber optic sensor (SLPG-2 = 76.32 dB/RIU) is higher as compared to the single LPG sensor (SLPG-1 = 54.65 dB/RIU). Hence, reported graphene oxide deposited long period grating sensor possess better sensitivity and can detect maximum 1.52× 10-5 index variation in the optical telecommunication band.",

author = "Mandeep Singh and Raghuwanshi, {Sanjeev Kumar} and Om Prakash",

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Ultra-Sensitive Fiber Optic Gas Sensor Using Graphene Oxide Coated Long Period Gratings

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