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About

About

My main work includes developing integrated solutions towards optimization of femto-etching, direct writing and micromachining using femtosecond based mechanisms which will enable the fabrication of the next-generation compact-size, low-power and intelligent sensing devices. In parallel tasks associated with optical fiber sensors fabrication, assembling and testing have been performed, both in lab and field environments.

Interest
Topics
Details

Details

  • Nationality

    Portugal
  • Centre

    Applied Photonics
  • Contacts

    +351220402301
    carlos.d.viveiros@inesctec.pt
001
Publications

2020

Magnetic field sensors in fused silica fabricated by femtosecond laser micromachining

Authors
Maia, JM; Amorim, VA; Viveiros, D; Marques, PVS;

Publication
Journal of Physics: Photonics

Abstract

2020

Femtosecond laser direct written off-axis fiber Bragg gratings for sensing applications

Authors
Viveiros, D; Amorim, VA; Maia, JM; Silva, S; Frazão, O; Jorge, PAS; Fernandes, LA; Marques, PVS;

Publication
Optics and Laser Technology

Abstract
First order off-axis fiber Bragg gratings (FBGs) were fabricated in a standard single mode fiber (SMF-28e) through femtosecond laser direct writing. A minimum offset distance between the grating and core center of 2.5 µm was found to create a multimode section, which supports two separate fiber modes (LP0,1 and LP1,1), each split into two degenerate polarization modes. The resulting structure breaks the cylindrical symmetry of the fiber, introducing birefringence (˜10-4) resulting in a polarization dependent Bragg wavelength for each mode. Based on the modal and birefringence behavior, three off-axis FBGs were fabricated with 3.0, 4.5 and 6.0 µm offsets from the core center, and then characterized in strain, temperature, and curvature. The tested off-axis FBGs exhibited a similar strain sensitivity of ~1.14 pm/µ? and a temperature sensitivity of ~12 pm/C. The curvature and orientation angle were simultaneously monitored by analyzing the intensity fluctuation and the wavelength shift of the LP1,1 Bragg resonance. A maximum curvature sensitivity of 0.53 dB/m-1 was obtained for the off-axis FBG with a 3.0 µm offset. © 2020 Elsevier Ltd

2020

Femtosecond laser micromachining of Fabry-Perot interferometers in SMF-28 fiber for pressure sensing (Conference Presentation)

Authors
Viveiros, D; Almeida, JMd; Coelho, L; Maia, JM; Amorim, VA; Vasconcelos, H; Jorge, PAS; Marques, PVS;

Publication
Optical Sensing and Detection VI

Abstract

2020

Femtosecond laser-written long period fibre gratings coated with titanium dioxide for improved sensitivity

Authors
Viveiros, D; Almeida, JMd; Coelho, L; Vasconcelos, H; Amorim, VA; Maia, JM; Jorge, PA; Marques, PVS;

Publication
Optical Sensing and Detection VI

Abstract

2019

Loss Mechanisms of Optical Waveguides Inscribed in Fused Silica by Femtosecond Laser Direct Writing

Authors
Amorim, VA; Maia, JM; Viveiros, D; Marques, PVS;

Publication
Journal of Lightwave Technology

Abstract