Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/18566
Title: | All-in-Fiber Cladding Interferometric and Bragg Grating Components Made via Plane-by-Plane Femtosecond Laser Inscription |
Authors: | Theodosiou, Antreas Ioannou, Andreas Kalli, Kyriacos |
Major Field of Science: | Engineering and Technology |
Field Category: | Electrical Engineering - Electronic Engineering - Information Engineering |
Keywords: | Cladding components;Femtosecond laser inscription;Fibre Bragg gratings;Fibre optics sensors;Microstructure fabrication;Optical design and fabrication |
Issue Date: | 15-Sep-2019 |
Source: | Journal of Lightwave Technology, 2019, vol. 37, no. 18, pp. 4864-4871 |
Volume: | 37 |
Issue: | 18 |
Start page: | 4864 |
End page: | 4871 |
Journal: | Journal of Lightwave Technology |
Abstract: | 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 |
Appears in Collections: | Άρθρα/Articles |
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