| Autor: |
Riobo LM, Veiras FE, Gonzalez MG, Garea MT, Sorichetti PA |
| Jazyk: |
angličtina |
| Zdroj: |
Applied optics [Appl Opt] 2018 Jan 10; Vol. 57 (2), pp. 217-224. |
| DOI: |
10.1364/AO.57.000217 |
| Abstrakt: |
This paper describes the design and performance of a phase demodulation scheme based on software-defined radio (SDR), applied in heterodyne interferometry. The phase retrieval is performed in real time by means of a low-cost SDR with a wideband optoelectronic front-end. Compared to other demodulation schemes, the system is quite simpler, versatile, and of lower cost. The performance of the demodulator is demonstrated by measuring the displacement per volt of a thin-film polymeric piezoelectric transducer based on polyvinylidene fluoride for ultrasonic applications. We measured displacements between 3.5 pm and 122 pm with 7% relative uncertainty, in the frequency range from 20 kHz to 1 MHz. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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