2026-05-29T22:18:10Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/453602026-02-12T00:46:07Zcom_10630_2254col_10630_37959

Enhancing optical feedback interferometry with an integrated variable optical attenuator. Arshad, Ayesha Zabit, Usman Bernal, Olivier Deleau, Clement Halir, Robert Interferometría Medidas ópticas Optical feedback interferometry is a promising technique for displacement sensing. Maintaining stable and precise optical feedback requires effective control of reflected light intensity. In this study, we propose an integrated on-chip OFI system featuring a variable optical attenuator (VOA) for dynamic feedback regulation. We develop a novel analytical model and, through a realistic attenuator design, demonstrate the system’s capability to achieve high-precision displacement measurements over a wide optical feedback parameter range (2 < C < 100) for target distances up to a few centimetres. These results highlight the potential of this approach for short-range applications with variable reflection conditions, such as MEMS characterisation. 2025-07-04 conference output https://hdl.handle.net/10630/45360 eng XIV Reunión Optoelectrónica Terrassa 2-4 Julio 2025 TED2021-130400B-I00 / AEI / 10.13039 / 501100011033 ANR-20-CE42-0010 PICSONDE http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 International