Title
Design of a radio frequency compensation system, using the electrical characterisation of a multi-transducer acousto-optical tunable filter
Author
Vanhamel, J. (TU Delft Space Systems Egineering) 
Dupont, Samuel (Université Polytechnique Hauts de France)
Kastelik, Jean-Claude (Université Polytechnique Hauts de France)
Dekemper, Emmanuel (Royal Belgian Institute for Space Aeronomy (BIRA-IASB))
Contributor
Astolfi, Arianna (editor)
Asdrudali, Francesco (editor)
Shtrepi, Louena (editor)
Date
2024-01-22
Abstract
Acousto-Optical Tunable Filters (AOTFs) make use of the interaction between sound and light. To generate an ultrasound diffraction grating, a Radio-Frequency (RF) signal is applied to a piezoelectric transducer. The optical pass band can be controlled by adapting the properties of this transducer and the RF-signal. To achieve more precise control of the optical spectral bandwidth, we propose to use a multi-electrode array, consisting of five consecutive transducers. The Voltage Standing Wave Ratio (VSWR) is then used to evaluate the efficiency of the coupling between the RF-signal applied to the transducer and the acousto-optical crystal. A higher VSWR indicates that more power is being reflected back and less is being absorbed by the transducer, which in turn results in a decrease in optical performance. The aim of this paper is to develop an RF driving system capable of compensating for the VSWR behavior, linked to the individual impedance matching network of each transducer. For this, the five transducer setups were
electrically characterized. These measurements allow the development of an RF power compensation system, leading to an increase of applied power at the level of each transducer. Hence, the absorbed power at transducer level increases, resulting in improved optical diffraction efficiency.
Subject
AOTF
RF-steering
compensation
VSWR
To reference this document use:
http://resolver.tudelft.nl/uuid:d3b842d6-3b02-4a7f-8429-fdbf6e53f6b7
DOI
https://doi.org/10.61782/fa.2023.0379
Embargo date
2024-07-01
ISBN
978-88-88942-67-4
Source
Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023
Event
Forum Acusticum 2023: 10th Convention of the European Acoustics Association, 2023-09-11 → 2023-09-15, Torino, Italy
Series
Proceedings of Forum Acusticum 2023, 2221-3767
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2024 J. Vanhamel , Samuel Dupont, Jean-Claude Kastelik, Emmanuel Dekemper