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Leaky mode integrated optical fibre refractometer
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DOI：10.1364/OE.26.009155.png)
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摘要
En 中文
A route to monitor external refractive indices greater than the core index of the waveguide is presented. Initial application utilizes an integrated optical fibre (IOF) platform due to its potential for use in harsh environment sensing. IOF is fabricated using a bespoke flame hydrolysis deposition process to fuse an optical fibre to a planar substrate achieving an optical quality, ruggedized glass layer between the fibre and substrate was fabricated. The presented refractometer is created by direct UV writing of multiple fibre Bragg gratings into an etched (22 mu m diameter) optical fibre post fabrication. Linear regression analysis is applied to quantify propagation loss by monitoring each FBG's back reflected power. The device operates with a sensitivity of approximately 350 dB/cm/RIU at a refractive index of 1.451 at 1550 nm. Numerical simulations using a transfer matrix method are presented and potential routes for development are discussed. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Keyword:
REFRACTIVE-INDEX SENSOR
BEAM-PROPAGATION METHOD
PLANAR WAVE-GUIDES
BOUNDARY-CONDITIONS
BRAGG GRATINGS
SENSITIVITY
SOLVER
INTERFERENCE
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期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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