Experimental demonstration of the impact of the fringe shape in sub-lambda/2 sensing with optical feedback interferometry
| Autor: | Mengkoung Veng, José Javier Imas, Francis Jayat, Julien Perchoux, Clément Tronche, Thierry Bosch, Thierry Mazoyer, Einar Knudsen |
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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 - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Instrumentation Conception Caractérisation (LAAS-I2C), 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), ACOEM |
| Rok vydání: | 2020 |
| Předmět: |
[PHYS]Physics [physics]
Physics business.industry Optical Feedback Interferometry Detector Phase (waves) Measure (physics) Laser OFI 01 natural sciences Atomic and Molecular Physics and Optics Displacement (vector) 010309 optics Interferometry Optics Amplitude Optical path 0103 physical sciences Self-Mixing Electrical and Electronic Engineering business Engineering (miscellaneous) Refractive index |
| Zdroj: | Applied optics Applied optics, Optical Society of America, 2021, 60 (1), pp.119-124. ⟨10.1364/AO.411103⟩ Applied optics, 2021, 60 (1), pp.119-124. ⟨10.1364/AO.411103⟩ |
| ISSN: | 2155-3165 1559-128X 0003-6935 1539-4522 |
| Popis: | It is established in the optical feedback interferometry (OFI) theory that the shape of the interferometric fringe has an impact on the detector’s response to very small displacement measurements. In this paper, we validate—for the first time, to the best of our knowledge, based on experimental results—this statement by comparing experiments to an established model implementation. Through these experiments, we show that the amplitude of the signals induced by sub- λ / 2 optical path variations is linearly dependent on the slope of the underlying fringe. Thus, careful control of the phase allows us to maximize the detection amplitude of very small displacements by positioning the phase where the fringe slope is the steepest. These results are directly applicable to established OFI applications that measure sub- λ / 2 optical path variations, such as OFI vibrometers or acoustic imaging though the acousto-optic effect. |
| Databáze: | OpenAIRE |
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