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Title: Birefringent bragg grating in c-shaped optical fiber as a temperature-insensitive refractometer
Authors: Tan, Rex Xiao
Ho, Daryl
Tse, Chun Ho
Tan, Yung Chuen
Yoo, Seong Woo
Tjin, Swee Chuan
Ibsen, Morten
Keywords: Fiber Bragg Gratings
DRNTU::Engineering::Electrical and electronic engineering
Fiber Sensors
Issue Date: 2018
Source: Tan, R., Ho, D., Tse, C., Tan, Y., Yoo, S., Tjin, S., & Ibsen, M. (2018). Birefringent Bragg Grating in C-Shaped Optical Fiber as a Temperature-Insensitive Refractometer. Sensors, 18(10), 3285-. doi:10.3390/s18103285
Series/Report no.: Sensors
Abstract: We demonstrate a simple-to-fabricate refractometer based on the inscription of fiber Bragg gratings in a special C-shaped optical fiber. The C-shaped fiber was drawn into shape using a quarter cladding removed preform of a commercial standard single-mode fiber by simple machining. The sensor did not suffer from cross-sensitivity of the refractive index with ambient temperature fluctuations, commonly occurring with many optical fiber refractometers. A refractive index sensitivity of 1300 pm per refractive index unit (RIU) was achieved without employing any additional sensitization techniques such as tapering or etching.
ISSN: 1424-8220
DOI: 10.3390/s18103285
Rights: © 2018 by The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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