High-order modes micro-knot excited by a long-period fiber grating

Shir Shahal, Hamootal Duadi, Moti Fridman

Research output: Contribution to journalLetterpeer-review

19 Scopus citations


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.

Original languageEnglish
Article number2490
Issue number11
StatePublished - 30 Oct 2017

Bibliographical note

Publisher Copyright:
© 2017 by the authors. Licensee MDPI, Basel, Switzerland.


  • Fiber micro-knot
  • High-order fiber modes
  • Long-period fiber grating


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