Refractometer based on fiber Bragg grating Fabry-Pérot cavity embedded with a narrow microchannel


We report on inscription of microchannels of different widths in optical fiber using femtosecond (fs) laser inscription assisted chemical etching and the narrowest channel has been created with a width down to only 1.2µm. Microchannels with 5µm and 35µm widths were fabricated together with Fabry-Pérot (FP) cavities formed by UV laser written fiber Bragg gratings (FBGs), creating high function and linear response refractometers. The device with a 5µm microchannel has exhibited a refractive index (RI) detection range up to 1.7, significantly higher than all fiber grating RI sensors. In addition, the microchannel FBG FP structures have been theoretically simulated showing excellent agreement with experimental measured characteristics.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Uncontrolled Keywords: microchannels,different widths,optical fiber,femtosecond laser inscription,assisted chemical etching,Atomic and Molecular Physics, and Optics
Publication ISSN: 1094-4087
Last Modified: 05 Feb 2024 08:10
Date Deposited: 13 Dec 2011 10:26
Full Text Link: http://www.opti ... =oe-19-12-11769
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2011-06-06
Authors: Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Yan, Zhijun
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Bennion, Ian


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