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Sensors 2017, 17(11), 2490; doi:10.3390/s17112490

High-Order Modes Micro-Knot Excited by a Long-Period Fiber Grating

Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
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Received: 24 September 2017 / Revised: 18 October 2017 / Accepted: 26 October 2017 / Published: 30 October 2017
(This article belongs to the Special Issue Fiber Bragg Grating Based Sensors)
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Abstract

We suggest a fiber micro-knot fabricated on a long-period fiber grating. The long-period fiber grating excites high-order modes into the micro-knot and transfers the output back to the Gaussian mode. We show theoretically and experimentally that these micro-knots have an improved Q-factor, higher stability, and have an increased evanescence wave coupling to the environment than single mode fiber micro-knots. These high-order fiber micro-knots can be beneficial for various fiber detectors and optical data processing systems. View Full-Text
Keywords: fiber micro-knot; long-period fiber grating; high-order fiber modes fiber micro-knot; long-period fiber grating; high-order fiber modes
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shahal, S.; Duadi, H.; Fridman, M. High-Order Modes Micro-Knot Excited by a Long-Period Fiber Grating. Sensors 2017, 17, 2490.

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