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| Titre: | Theoretical and experimental study of the light deflection by a frequency modulated ultrasonic wave |
| Auteur(s): | Guessoum, A
Laouar, N
Ferria, K |
| Mots-clés: | Acousto-optic interaction
Frequency modulation
Frequency modulation index
Angular excursion |
| Date de publication: | 3-mai-2018 |
| Collection/Numéro: | Optics and Laser Technology;97 (2017) 260–267 |
| Résumé: | A formula that describes angular excursion variation of an acousto-optical deflector is theoretically
demonstrated and experimentally confirmed. This deflector is obtained using a laser beam interaction
with a frequency modulated ultrasonic sinusoidal wave in a liquid medium. The obtained results show
that each diffracted order position varies sinusoidally around its central position, in the same rhythm
as the modulating signal. Moreover, the scanning frequency of the diffraction order increases linearly
according to the modulating signal frequency. Furthermore, the increase in the frequency excursion leads
to the increase of the angular excursion. All the theoretical results are confirmed experimentally. Finally,
the frequency modulation index has been easily obtained with good precision using experimental measurements of the diffracted order angular excursion. |
| URI/URL: | http://dspace.univ-setif.dz:8888/jspui/handle/123456789/1459 |
| ISSN: | ISSN: 0030-3992 |
| Collection(s) : | Articles
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