Characterization of a thin-film metal-coated fiber optical phase modulator based on thermal effect with a nonlinear control interferometer

Author(s)

Nunes, Gabriel F. S. ^{[1, 2]} ; Palma, Vinicius B. ^{[2, 3]} ; Martin, I, Roberta ; Felao, V, Luiz H. ; Teixeira, Marcelo C. M. ^[4] ; Kitano, Claudio ^[4] ; Cazo, Rogerio M. ^[2] ; Sakamoto, Joao M. S. ^{[1, 2]}

Affiliation

^[1] Aeronaut Inst Technol, Inst Tecnol Aeronaut ITA, Praca Mal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[2] Inst Adv Studies, Div Photon, Inst Estudos Avancados IEAv, Trevo Cel Av Jose AA do Amarante 1, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[3] Univ Fed Sao Paulo UNIFESP, Av Cesare Mansueto Giulio Lattes 1201, BR-12247014 Sao Jose Dos Campos, SP - Brazil

^[4] Felao, Luiz H., V, Martin, Roberta, I, Sao Paulo State Univ UNESP, Dept Elect Engn, Jose Carlos Rossi Ave 1370, BR-15385000 Ilha Solteira, SP - Brazil

• Document type: Journal article
• Source: APPLIED OPTICS; v. 60, n. 25, p. 7611-7618, SEP 1 2021.
• Web of Science Citations: 0

Abstract

In this work, an optical fiber was coated by a thin-film metal layer to work as a fiber optical phase modulator based on thermal effect. This device was assembled in one of the arms of an all-fiber Michelson interferometer stabilized by a nonlinear control system based on variable structure and sliding modes. The frequency response reached 200 Hz, which can be considered high for a device based on the thermal effect. Compared with a fiber optical phase modulator based on the piezoelectric effect, the thermal modulator presented a higher scale factor per meter of optical fiber, showing the potential to work as a simple, low-cost, small-sized, short length, lightweight, and low-voltage fiber optical phase modulator. (C) 2021 Optical Society of America (AU)

• FAPESP's process: 19/04679-4 - All-fiber optical interferometer with nonlinear control for accelerometers
• Grantee: Gabriel Fernandes de Souza Nunes
• Support Opportunities: Scholarships in Brazil - Master