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

Sankhyabrata Bandyopadhyay; Liyang shao; Mateusz Smietana; Chao Wang; Jie Hu; Guoqing Wang; Wei He; Guoqiang Gu; Yatao Yang

doi:10.1109/JPHOT.2019.2963125

IEEE Photonics Journal (Jan 2020)

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

Sankhyabrata Bandyopadhyay,
Liyang shao,
Mateusz Smietana,
Chao Wang,
Jie Hu,
Guoqing Wang,
Wei He,
Guoqiang Gu,
Yatao Yang

Affiliations

Sankhyabrata Bandyopadhyay: ORCiD; Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China
Liyang shao: ORCiD; Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China
Mateusz Smietana: ORCiD; Warsaw University of Technology, Institute of Microelectronics and Optoelectronics, Warsaw, Poland
Chao Wang: ORCiD; School of Engineering and Digital Arts, University of Kent, Canterbury, U.K.
Jie Hu: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China
Guoqing Wang: ORCiD; Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China
Wei He: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China
Guoqiang Gu: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China
Yatao Yang: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China

DOI: https://doi.org/10.1109/JPHOT.2019.2963125
Journal volume & issue: Vol. 12, no. 1
pp. 1 – 13

Abstract

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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.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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