Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Refractive index sensing characteristics of dual resonance long period gratings in bare and metal-coated D-shaped fibers

Not Accessible

Your library or personal account may give you access

Abstract

We present a theoretical study of the ambient refractive index sensing characteristics of long period gratings in bare and metal-coated D-shaped fibers. An equivalent rectangular core waveguide method based on the first-order perturbation theory has been used to study the modal behavior of the waveguide. Power coupling corresponding to dual resonance in both cases has been investigated, and an optimum metal thickness giving maximum sensitivity has been found to exist. The study shows that the dual resonances can be shifted to lower wavelengths by increasing (decreasing) the metal thickness (core to flat surface separation). Further, an optimum combination of metal thickness and core to flat surface separation, corresponding to maximum sensitivity, has been presented for different cladding modes and their relative performance has been discussed. It has been shown theoretically that detection of refractive index changes as small as 1.67×107RIU in the ambient region is possible using the optimized parameters. The study should find application in realizing highly sensitive biochemical sensors.

© 2009 Optical Society of America

Full Article  |  PDF Article
More Like This
Bragg grating based biochemical sensor using submicron Si/SiO2 waveguides for lab-on-a-chip applications: a novel design

Saurabh Mani Tripathi, Arun Kumar, Emmanuel Marin, and Jean-Pierre Meunier
Appl. Opt. 48(23) 4562-4567 (2009)

Refractive index sensing characteristics in a D-shaped photonic quasi-crystal fiber sensor based on surface plasmon resonance

Chenguang Li, Bei Yan, and Jianjun Liu
J. Opt. Soc. Am. A 36(10) 1663-1668 (2019)

Matching long-period grating modes and localized plasmon resonances: effect on the sensitivity of the grating to the surrounding refractive index

Bárbara Rutyna Heidemann, Júlia De Carvalho Pereira, Ismael Chiamenti, Marcela Mohallem Oliveira, Marcia Muller, and José Luís Fabris
Appl. Opt. 55(32) 8979-8985 (2016)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved