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Sensors 2017, 17(11), 2490;

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
Author to whom correspondence should be addressed.
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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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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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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