Author:
Thottoli Ajmal,Biagi Gabriele,Vorobev Artem S.,Giglio Marilena,Magno Giovanni,O’Faolain Liam,Grande Marco
Abstract
AbstractThe design and fabrication of a compact, low-loss, broadband directional coupler (DC) based duplexer operating in the near-infrared (NIR) region are demonstrated. The duplexer exhibits high selectivity and coupling efficiency (CE), for target wavelengths of 1530 nm and 1653.7 nm, making it applicable in systems for the multi-gas detection of ammonia and methane. The measured CE for the duplexer is 73% and 76% at 1530 nm and 1653.7 nm respectively. These results demonstrate the effectiveness of the duplexer as a broadband and scalable power source for highly sensitive sensing techniques, like quartz-enhanced photoacoustic spectroscopy (QEPAS). Its compact size and low-loss characteristics make it highly portable and well-suited for drone-based multi-gas detection applications.
Funder
Horizon 2020 Framework Programme
H2020 Marie Skłodowska-Curie Actions
Regione Puglia
Publisher
Springer Science and Business Media LLC