Artículos de revistas
Wide dynamic range quadrature interferometer with high-gain approach and sliding mode control
Fecha
2019-09-02Registro en:
Optics Express, v. 27, n. 18, p. 25031-25045, 2019.
1094-4087
10.1364/OE.27.025031
2-s2.0-85071541606
2883440351895167
0000-0001-6320-755X
Autor
Universidade Estadual Paulista (Unesp)
Instituto de Estudos Avançados (IEAv)
Institución
Resumen
The present work concerns with the modeling, development and application of a novel control strategy based on sliding mode control for two beam quadrature interferometers, with the high-gain approach. In this case, by reading the control signal, the demodulation process does not require phase unwrapping algorithms, i.e., the output signal presents a straight-line relationship with the interferometer total phase shift. This system was implemented in a digital platform to control a bulk Michelson interferometer whose performance was experimentally determined, showing its capability on achieving real-time measurement and presenting wider dynamic range and bandwidth (52.5 rad in low frequencies and 5.8 rad up to 500 Hz) when compared with the literature. Moreover, this performance can be improved even further by simply increasing the feedback gain.