Wide dynamic range quadrature interferometer with high-gain approach and sliding mode control

Author(s)

Felao, V, Luiz H. ; Martin, I, Roberta ; Sakamoto, Joao M. S. ^[1] ; Teixeira, Marcelo C. M. ^[2] ; Kitano, Claudio ^[2]

Affiliation

^[1] Inst Estudos Avancados IEAv, Div Photon, Trevo Cel Av Jose AA do Anuzrante 1, BR-12228001 Sao Jose Dos Campos, SP - Brazil

^[2] Martin, Roberta, I, Felao, Luiz H., V, Sao Paulo State Univ UNESP, Dept Elect Engn, Sch Nat Sci & Engn, BR-15385000 Ilha Solteira, SP - Brazil

• Document type: Journal article
• Source: Optics Express; v. 27, n. 18, p. 25031-25045, SEP 2 2019.
• Web of Science Citations: 0

Abstract

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. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (AU)

• FAPESP's process: 17/17235-1 - Nonlinear control system for optical interferometry based on fuzzy Takagi-Sugeno and LMI's
• Grantee: Luiz Henrique Vitti Felão
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)