Investigations on Sensitivity of Modal Fibre-Interferometer for Acoustic Detection

Alexandre C. T. Santos, Alexandre C. T. Santos, Ricardo Ribeiro, Andrés Barbero, Taiane G. de Freitas, Cláudia Marcondes

2023

Abstract

This paper describes investigations on sensitivity of modal fibre-interferometer named as “modalmetric”, which is inserted in two optical coupling circuits based on circulator and 2x2 fibre-coupler. The “modalmetric” in reflective structure is simply a single-mode fusion spliced with a short or long piece of a sensitive multi-mode fibre (s-MMF) with a cleaved or mirrored end. All the devices presented here were probed in the C-band and the tests were carried out at ~ 43 kHz frequency. By using a circulator, an increased opto-acoustic sensitivity could be reached by misalignment of a FC/PC connection in the single-mode fibre, thus suggesting the excitation of higher order modes in addition to the fundamental LP01. By using an 2x2 fibre-coupler, an in-creased sensitivity was observed when one of the arms was made more reflective from the FC/PC ferrule termination, thus suggesting a combination of modalmetric with Michelson interferometer or alternatively a type of light recycling that oscillates between the reflective terminations. This paper also shows successful tests of acoustic transmission through a 9.5cm length metallic billet. The central motivation is future applications of the modalmetric-based devices on ultrasonic communication and monitoring through solid media.

Paper Citation

in Harvard Style

C. T. Santos A., Ribeiro R., Barbero A., G. de Freitas T. and Marcondes C. (2023). Investigations on Sensitivity of Modal Fibre-Interferometer for Acoustic Detection. In Proceedings of the 11th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-632-3, pages 88-95. DOI: 10.5220/0011778000003408

in Bibtex Style

@conference{photoptics23,
author={Alexandre C. T. Santos and Ricardo Ribeiro and Andrés Barbero and Taiane G. de Freitas and Cláudia Marcondes},
title={Investigations on Sensitivity of Modal Fibre-Interferometer for Acoustic Detection},
booktitle={Proceedings of the 11th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2023},
pages={88-95},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0011778000003408},
isbn={978-989-758-632-3},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 11th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Investigations on Sensitivity of Modal Fibre-Interferometer for Acoustic Detection
SN - 978-989-758-632-3
AU - C. T. Santos A.
AU - Ribeiro R.
AU - Barbero A.
AU - G. de Freitas T.
AU - Marcondes C.
PY - 2023
SP - 88
EP - 95
DO - 10.5220/0011778000003408