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https://hdl.handle.net/20.500.14279/18566
Τίτλος: | All-in-Fiber Cladding Interferometric and Bragg Grating Components Made via Plane-by-Plane Femtosecond Laser Inscription | Συγγραφείς: | Theodosiou, Antreas Ioannou, Andreas Kalli, Kyriacos |
Major Field of Science: | Engineering and Technology | Field Category: | Electrical Engineering - Electronic Engineering - Information Engineering | Λέξεις-κλειδιά: | Cladding components;Femtosecond laser inscription;Fibre Bragg gratings;Fibre optics sensors;Microstructure fabrication;Optical design and fabrication | Ημερομηνία Έκδοσης: | 15-Σεπ-2019 | Πηγή: | Journal of Lightwave Technology, 2019, vol. 37, no. 18, pp. 4864-4871 | Volume: | 37 | Issue: | 18 | Start page: | 4864 | End page: | 4871 | Περιοδικό: | Journal of Lightwave Technology | Περίληψη: | We introduce a method of inscribing in-fiber devices using a femtosecond laser that is applicable to crucial components, such as cladding waveguides (CWGs), cladding Mach-Zehnder interferometers (MZIs), embedded waveguide Bragg gratings (WBGs), and waveguide Fabry-Perot cavities using the same key femtosecond laser parameters, via an 'inscribe and step,' plane-by-plane approach, applied as necessary on two orthogonal axes. This leads to femtosecond laser-inscribed cladding waveguides and ultra-compact MZIs that can support functional, integrated fiber Bragg gratings; the unique sensing characteristics of the filters are maintained and provide complementary measure and information. This ensures a single inscription process, offering reliability and repetition in component manufacture, as the basic conditions to inscribe the here-demonstrated elements are common. We characterize CWG-WBG devices for axial strain, bend, and response to refractive index. The MZI-WBG is exposed to temperature and humidity excursions, confirming that the unique sensor responses are maintained for this compact, compound sensor. The MZI exhibits response to external refractive index, a large, negative wavelength response with temperature and high sensitivity to humidity, whereas the MZI-located WBG displays a similar sensitivity to conventional core-based Bragg grating sensors to temperature and no response to relative humidity. We consider that this research is an important step in the development of compact, smart optical fiber sensors. | URI: | https://hdl.handle.net/20.500.14279/18566 | ISSN: | 15582213 | DOI: | 10.1109/JLT.2019.2925263 | Rights: | © IEEE Attribution-NonCommercial-NoDerivs 3.0 United States |
Type: | Article | Affiliation: | Cyprus University of Technology | Publication Type: | Peer Reviewed |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
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