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https://hdl.handle.net/20.500.14279/19125
Τίτλος: | Fibre cladding interferometers and Bragg gratings 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: | Bragg gratings;Femtosecond laser inscription;Fibre waveguides;Optical fibre sensing | Ημερομηνία Έκδοσης: | 28-Αυγ-2019 | Πηγή: | Seventh European Workshop on Optical Fibre Sensors, 2019, 1-4 October, Limassol, Cyprus | Conference: | European Workshop on Optical Fibre Sensors | Περίληψη: | We present an extremely flexible femtosecond (fs) laser inscription method, applicable to the development of critical filtering and wave-guiding components in optical fibres. We inscribe in-fibre devices, such as cladding waveguides (CWGs), cladding Mach-Zehnder interferometers (MZIs) and embedded waveguide Bragg gratings (WBGs) using the same key femtosecond laser parameters, via an "inscribe and step", plane-by-plane (Pl-by-Pl) 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 fibre Bragg gratings (FBGs); the unique sensing characteristics of the filters are maintained and provide complementary measurand information. The flexibility and control in waveguide/grating fabrication leads to sensing device customization, e.g.Tailored bend sensing. We characterize CWG-WBG devices for their bend response, whereas the MZI-WBG is exposed to temperature and humidity excursions, confirming 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 developing compact, smart optical fibre sensors. | URI: | https://hdl.handle.net/20.500.14279/19125 | ISBN: | 978-151063123-6 | DOI: | 10.1117/12.2540158 | Rights: | © SPIE Attribution-NonCommercial-NoDerivatives 4.0 International |
Type: | Conference Papers | Affiliation: | Cyprus University of Technology University of Mons |
Publication Type: | Peer Reviewed |
Εμφανίζεται στις συλλογές: | Δημοσιεύσεις σε συνέδρια /Conference papers or poster or presentation |
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