Refractometer based on fiber Bragg grating Fabry-Pérot cavity embedded with a narrow microchannel.
Open Access
- 2 June 2011
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 19 (12), 11769-11779
- https://doi.org/10.1364/oe.19.011769
Abstract
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.This publication has 19 references indexed in Scilit:
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