Non-Uniform Sampling Theory applied to FM Channel Optical Feedback Interferometry for Displacement Sensors
| Autor: | Olivier Bernal, Han Cheng Seat, Frederic Surre, Usman Zabit, Clement Deleau, Thierry Bosch |
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| Přispěvatelé: | Equipe Capteurs optiques et systèmes intégrés intelligents (LAAS-OASIS), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Institut National Polytechnique (Toulouse) (Toulouse INP), Ecole Nationale Supérieure d'Electrotechnique, d'Electronique, d'Informatique, d'Hydraulique et de Télécommunications (ENSEEIHT), Université de Toulouse (UT)-Université de Toulouse (UT), James Watt School of Engineering [Univ Glasgow], University of Glasgow, Riphah International University, National University of Sciences and Technology [Islamabad] (NUST), ANR-20-CE42-0010,PICSONDE,Circuit Intégré Photonique couplé à un Système sur Puce pour un capteur de déplacement sub-picométrique(2020) |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | 2022 IEEE Sensors 2022 IEEE Sensors, Oct 2022, Dallas, United States. pp.1-4, ⟨10.1109/SENSORS52175.2022.9967106⟩ |
| DOI: | 10.1109/sensors52175.2022.9967106 |
| Popis: | International audience; In this paper, the optical feedback interferometry (OFI) signals obtained from the frequency modulated (FM) channel are processed by a non-uniform sampling (NUS) method to retrieve target displacements. The FM OFI channel signal is converted into its corresponding amplitude modulated (AM) signal using a free-space Michelson interferometer as an edge filter with a sensitivity of 1.3(GHz) −1 . The laser diode (LD) is operated in moderate optical feedback regime and its wavelength is modulated with a sinusoidal dithering signal applied on the LD driving-current. This dithering signal allows the recovery of sub half-wavelength displacements. Contrary to phase unwrapping methods, the proposed method based on NUS relies only on OFI's fringe detection to recover the target's displacement and thus is not affected by the non-linear response of the employed edge filter. In addition, compared to lock-in techniques, the dynamic range is not limited by the tuning range of the LD. Using a laser diode emitting at 1550 nm, the noise equivalent displacement for a 1 kHz bandwidth is approximately 8.4 nm and 0.9 nm for the AM-and the FM-channel, respectively. |
| Databáze: | OpenAIRE |
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