Compact angled multimode interference duplexers for multi-gas sensing applications
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Published Version
Date
2024
Authors
Thottoli, Ajmal
Vorobev, Artem
Biagi, Gabriele
Iadanza, Simone
Giglio, Marilena
Magno, Giovanni
Grande, Marco
O'Faolain, Liam
Journal Title
Journal ISSN
Volume Title
Publisher
Optica Publishing Group
Published Version
Abstract
A compact, low-loss 2 × 1 angled-multi-mode-interference-based duplexer is proposed as an optical component for integrating several wavelengths with high coupling efficiency. The self-imaging principle in multimode waveguides is exploited to combine two target wavelengths, corresponding to distinctive absorption lines of important trace gases. The device performance has been numerically enhanced by engineering the geometrical parameters, offering trade-offs in coupling efficiency ratios. The proposed designs are used as versatile duplexers for detecting gas combinations such as ammonia-methane, ammonia-ethane, and ammonia-carbon dioxide, enabling customization for specific sensing applications. The duplexers designed are then fabricated and characterized, with a special focus on assessing the impact of the different target wavelengths on coupling efficiency.
Description
Keywords
Compact, low-loss 2 × 1 angled-multi-mode-interference-based duplexer , Optical component for integrating several wavelengths with high coupling efficiency
Citation
Thottoli, A., Vorobev, A., Biagi, G., Iadanza, S., Giglio, M., Magno, G., Grande, M. and O'Faolain, L. (2024) 'Compact angled multimode interference duplexers for multi-gas sensing applications', Optics Express, 32(3), 3451-3460. https://doi.org/10.1364/OE.503483