2026-05-28T16:48:16Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/251322026-02-03T12:17:25Zcom_10630_2254col_10630_37959

Mitigating reflections in integrated gas sensors Torres-Cubillo, Antonia Wanguemert-Pérez, Juan Gonzalo Sánchez-Postigo, Alejandro Molina-Fernández, Íñigo Halir, Robert Detectores ópticos - Congresos Detectores de gases - Congresos Óptica electrónica - Congresos Optical gas sensing for environmental monitoring has become an active research topic in the last decade. Among the different optical sensing configurations, silicon photonic integrated sensors stand as a compact, CMOS-compatible alternative. However, even small on-chip reflections can create significant fringes when the optical path length is varied, e.g., when the wavelength is swept for TDLAS-like measurements. These fringes can be critical for NIR sensors, as absorption signals are much weaker in this region than in the MIR. Here, we propose a signal-processing method based on minimum phase techniques: by increasing the measurement bandwidth to around 2 nm we can completely remove the reflection artifacts through processing. 2022-09-28T09:39:05Z 2022-09-28T09:39:05Z 2022-09-28T09:39:05Z 2022-09-07 conference output https://hdl.handle.net/10630/25132 eng Norwegian Electro-Optics Meeting Roros 7-9 septiembre 2022 open access