Laser optical feedback imaging controlled by an electronic feedback loop
| Autor: | Olivier Hugon, Wilfried Glastre, Hugues Guillet de Chatellus, Eric Lacot, Olivier Jacquin, Pierre Guillemé |
|---|---|
| Přispěvatelé: | LIPhy-OPTIMA, Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) |
| Rok vydání: | 2013 |
| Předmět: |
Physics::Optics
02 engineering and technology 01 natural sciences law.invention 010309 optics 020210 optoelectronics & photonics Optics law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Imagerie interférométrique [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] Laser power scaling capteur laser Physics [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Distributed feedback laser business.industry boucle de contre réaction Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Interferometry Signal beam Reference beam Optical cavity Computer Vision and Pattern Recognition Laser beam quality 110.3175 280.3420 business réinjection optique |
| Zdroj: | Journal of the Optical Society of America. A Optics, Image Science, and Vision Journal of the Optical Society of America. A Optics, Image Science, and Vision, Optical Society of America, 2013, 30 (11), pp.2205-2215. ⟨10.1364/JOSAA.30.002205⟩ |
| ISSN: | 1520-8532 1084-7529 |
| DOI: | 10.1364/josaa.30.002205 |
| Popis: | International audience; In autodyne interferometry, the beating between the reference beam and the signal beam takes place inside the laser cavity and therefore the laser fulfills simultaneously the roles of emitter and detector of photons. In these conditions, the laser relaxation oscillations play a leading role, both in the laser quantum noise which determines the signal to noise ratio (SNR) and also in the laser dynamics which determines the response time of the interferometer. In the present study, we have experimentally analyzed the SNR and the response time of a Laser Optical Feedback Imaging (LOFI) interferometer based on a Nd3+ microchip laser, with a relaxation frequency in the megahertz range. More precisely, we have compared the image quality obtained, when the laser dynamics is free and when it is controlled by a stabilizing electronic feedback loop using a differentiator. From this study, we can conclude that when the laser time response is shorter (i.e. the LOFI gain is lower), the image quality can be better (i.e. the LOFI SNR can be higher) and that the use of an adapted electronic feedback loop allows high speed LOFI with a shot-noise limited sensitivity. Despite the critical stability of the electronic feedback loop, the obtained experimental results are in good agreement with the theoretical predictions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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