Abstract

We propose and experimentally demonstrate a method to significantly extend the sensitive window of tilted fiber-Bragg grating (TFBG) into low-refractive-index region with the integration of graphene coating. The coupling between cladding modes of TFBG and graphene coating results in an obvious modification of the cladding-mode envelope, which provides a sensitive regime relying on graphene’s complex refractive index. Interacting the graphene-coated TFBG with various aqueous solutions, we observe strongly enhanced sensitivity in the low-refractive-index region of 1–1.428, which is about 10-fold extended from that of the unloaded TFBG. The graphene-coated TFBGs present great potentials in the biochemical sensing window.

© 2015 Optical Society of America

Absolute near-infrared refractometry with a calibrated tilted fiber Bragg grating

Wenjun Zhou, David J. Mandia, Seán T. Barry, and Jacques Albert
Opt. Lett. 40(8) 1713-1716 (2015)

Plasmonic nanoshell functionalized etched fiber Bragg gratings for highly sensitive refractive index measurements

Jörg Burgmeier, Amin Feizpour, Wolfgang Schade, and Björn M. Reinhard
Opt. Lett. 40(4) 546-549 (2015)

Enhanced strain and temperature sensing by reduced graphene oxide coated etched fiber Bragg gratings

Sridevi. S, K. S. Vasu, S. Asokan, and A. K. Sood
Opt. Lett. 41(11) 2604-2607 (2016)

Localized tilted fiber Bragg gratings induced by femtosecond laser line-by-line inscription

Bonan Liu, Kaiming Yang, Changrui Liao, Zhihao Cai, Yifan Liu, Bing Sun, and Yiping Wang
Opt. Lett. 46(9) 2204-2207 (2021)

Graphene-induced unique polarization tuning properties of excessively tilted fiber grating

Biqiang Jiang, Guolu Yin, Kaiming Zhou, Changle Wang, Xuetao Gan, Jianlin Zhao, and Lin Zhang
Opt. Lett. 41(23) 5450-5453 (2016)