Artículo
High-speed real-time heterodyne interferometry using software-defined radio
Riobó, Lucas Matías
; Veiras, Francisco Ezequiel
; González, Martín Germán
; Garea, María Teresa; Sorichetti, Patricio Aníbal
Fecha de publicación:
01/2018
Editorial:
Optical Society of America
Revista:
Applied Optics
ISSN:
0003-6935
e-ISSN:
2155-3165
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
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.
Palabras clave:
Detectors
,
Interferometry
,
Nondestructive testing
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Citación
Riobó, Lucas Matías; Veiras, Francisco Ezequiel; González, Martín Germán; Garea, María Teresa; Sorichetti, Patricio Aníbal; High-speed real-time heterodyne interferometry using software-defined radio; Optical Society of America; Applied Optics; 57; 2; 1-2018; 217-224
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