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Microfiber Knot Resonators for Sensing Applications

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Optics, Photonics and Laser Technology 2017

Part of the book series: Springer Series in Optical Sciences ((SSOS,volume 222))

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Abstract

Microfiber knot resonators are widely applied in many different fields of action, of which an important one is the optical sensing. Microfiber knot resonators can easily be used to sense the external medium. The large evanescent field of light increase the interaction of light with the surrounding medium, tuning the resonance conditions of the structure. In some cases, the ability of light to give several turns in the microfiber knot resonator allows for greater interaction with deposited materials, providing an enhancement in the detection capability. So far a wide variety of physical and chemical parameters have been possible to measure using microfiber knot resonators. However, new developments and improvements are still being done in this field. In this chapter, a review on sensing with microfiber knot resonators is presented, with particular emphasis on the application of these structures as temperature and refractive index sensors. A detailed analysis on the properties of these structures and different assembling configurations is presented. An important discussion regarding the sensor stability is presented, as well as alternatives to increase the device robustness. An overview on the recent developments in coated microfiber knot resonators is also addressed. In the end, other microfiber knot configurations are explored and discussed.

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Authors and Affiliations

  1. Faculty of Sciences, INESC TEC and Department of Physics and Astronomy, University of Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal

    A. D. Gomes & O. Frazão

Authors
  1. A. D. Gomes
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  2. O. Frazão
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Correspondence to A. D. Gomes .

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Editors and Affiliations

  1. Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal

    Paulo Ribeiro

  2. School of Chemistry, University of East Anglia, Norwich, UK

    David L. Andrews

  3. Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal

    Maria Raposo

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Gomes, A.D., Frazão, O. (2019). Microfiber Knot Resonators for Sensing Applications. In: Ribeiro, P., Andrews, D., Raposo, M. (eds) Optics, Photonics and Laser Technology 2017. Springer Series in Optical Sciences, vol 222. Springer, Cham. https://doi.org/10.1007/978-3-030-12692-6_7

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