Trimodal waveguide demonstration and its implementation as a high order mode interferometer for sensing application
Cordoba Ramirez, Jhonattan (Universidade Federal de Minas Gerais. Departamento de Engenharia Eletrónica)
Gabrielli, Lucas H. (Universidade Estadual de Campinas. Faculdade de Engenharia Elétrica e de Computação)
Lechuga, Laura M (Institut Català de Nanociència i Nanotecnologia)
Hernández Figueroa, Hugo Enrique (Universidade Estadual de Campinas. Faculdade de Engenharia Elétrica e de Computação)

Date:	2019
Abstract:	This work implements and demonstrates an interferometric transducer based on a trimodal optical waveguide concept. The readout signal is generated from the interference between the fundamental and second-order modes propagating on a straight polymer waveguide. Intuitively, the higher the mode order, the larger the fraction of power (evanescent field) propagating outside the waveguide core, hence the higher the sensitivity that can be achieved when interfering against the strongly confined fundamental mode. The device is fabricated using the polymer SU-8 over a SiO substrate and shows a free spectral range of 20. 2 nm and signal visibility of 5. 7 dB, reaching a sensitivity to temperature variations of 0. 0586 dB/°C. The results indicate that the proposed interferometer is a promising candidate for highly sensitive, compact and low-cost photonic transducer for implementation in different types of sensing applications, among these, point-of-care.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Integrated optics ; Modal interferometer ; Sensor ; Polymer waveguide ; Direct laser writer fabrication
Published in:	Sensors (Basel, Switzerland), Vol. 19, issue 12 (June 2019) , art. 2821, ISSN 1424-8220

DOI: 10.3390/s19122821
PMID: 31238583

11 p, 3.0 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles