Bragg gratings and Fabry-Perot interferometers on an Er-MgO-doped optical fiber

•FBGs and FPIs inscribed in an Er-MgO doped optical fiber, by a femtosecond laser.•High-performance on the inscription of FBGs (reflectivity of ~99%).•Achieved sensitivities of 0.91 pm/µε and 12.7 pm/°C.•FBGs can sustain high temperatures up to 700 °C, without significant degradation. In this paper,...

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Bibliographic Details
Published inOptics and laser technology Vol. 123; p. 105946
Main Authors Paixão, Tiago, Pereira, Luís, Min, Rui, Molardi, Carlo, Blanc, Wilfried, Tosi, Daniele, Marques, Carlos, Antunes, Paulo
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.03.2020
Elsevier BV
Elsevier
Subjects
Bragg gratings
Doped fibers
Doped optical fiber
Fabry-Perot interferometers
Fabry-Pérot interferometer
Femtosecond Laser
Fiber bragg grating
Fiber lasers
High temperature effects
Magnesium oxide
Micromachining
Optical fibers
Optics
Optoelectronic devices
Physics
Sensors
Silicon dioxide
Thermodynamic properties
Fabry-Pérot interferometer
Doped optical fiber
Femtosecond Laser
Fiber bragg grating
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Summary:•FBGs and FPIs inscribed in an Er-MgO doped optical fiber, by a femtosecond laser.•High-performance on the inscription of FBGs (reflectivity of ~99%).•Achieved sensitivities of 0.91 pm/µε and 12.7 pm/°C.•FBGs can sustain high temperatures up to 700 °C, without significant degradation. In this paper, the fabrication of fiber Bragg gratings (FBGs) and intrinsic Fabry-Pérot interferometers (IFPIs) on an Er-MgO-doped silica optical fiber is reported. The inscription of both sensing devices was performed by means of a femtosecond laser, using the phase mask method to inscribe the FBG and a micromachining platform for the IFPI. Thermal and strain characterizations were performed for both devices, achieving the maximum sensitivities of 12.57 pm/°C and 0.85 pm/µε for the FBG case, and 10.2 pm/°C and 0.91 pm/µε for the IFPI. A high temperature experiment was conducted to assess the thermal behavior of the inscribed FBG, revealing sensing capabilities for temperatures up to 700 °C. The results confirm that this new type of fiber will have an important role on the development of new optoelectronic devices, such as fiber lasers, optical amplifiers and sensors.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2019.105946