Optical RI sensor based on an in-fiber bragg grating fabry-perot cavity embedded with a micro-channel


We report a linear response optical refractive index (RI) sensor, which is fabricated based on a micro-channel created within a Fabry Perot (F-P) cavity by chemical etching assisted by femtosecond laser inscription. The experimental results show the F-P resonance peak has a linear response with the RI of medium and the measuring sensitivity is proportion to the length of micro-channel. The sensor with 5 μm -long micro-channel exhibited an RI sensitivity of 1.15nm/RIU and this sensitivity increased to 9.08nm/RIU when widening the micro-channel to 35μm. Furthermore, such micro-channel FP sensors show a much broader RI sensing dynamic range (from 1.3 to 1.7) than other reported optical fiber sensors.

Publication DOI: https://doi.org/10.1117/12.921410
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Zhijun Yan; Pouneh Saffari; Kaiming Zhou; Adedotun Adebay and Lin Zhang, "Optical RI sensor based on an in-fiber Bragg grating Fabry-Perot cavity embedded with a micro-channel", Proc. SPIE 8426, Microstructured and Specialty Optical Fibres, 842609 (June 1, 2012). Copyright 2012. Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI: http://dx.doi.org/10.1117/12.921410
Event Title: Microstructured and specialty optical fibres
Event Type: Other
Event Dates: 2012-04-17 - 2012-04-19
Uncontrolled Keywords: F-P sensors,FBG,femtosecond laser,micro-channel,refractive index,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
ISBN: 978-0-8194-9118-3
Last Modified: 05 Jan 2024 08:26
Date Deposited: 21 Dec 2015 14:05
Full Text Link: http://proceedi ... ticleid=1315939
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference contribution
Published Date: 2012-04-12
Authors: Yan, Zhijun
Saffari, Pouneh
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Adebay, Adedotun
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)



Version: Published Version

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