The effect of frequency modulation on the FSR of a Fabry-Perot cavity using an Optical Spectrum Analyser

João Reis; António V.Rodrigues; Paulo Robalinho; Susana Novais; João Maia; Paulo Marques; D. Roma; J. Salvans; M. Canal; J. Ramos; V. Gualani; S. Sisteré; V. Martín; M. Nofrarias; Susana Silva; Orlando Frazão

doi:10.1051/epjconf/202226613027

All issues

Volume 266 (2022)

EPJ Web Conf., 266 (2022) 13027

Abstract

Open Access

Issue		EPJ Web Conf. Volume 266, 2022 EOS Annual Meeting (EOSAM 2022)


Article Number		13027
Number of page(s)		2
Section		Topical Meeting (TOM) 13- Advances and Applications of Optics and Photonics
DOI		https://doi.org/10.1051/epjconf/202226613027
Published online		13 October 2022

EPJ Web of Conferences 266, 13027 (2022)
https://doi.org/10.1051/epjconf/202226613027

The effect of frequency modulation on the FSR of a Fabry-Perot cavity using an Optical Spectrum Analyser

João Reis¹^,3^*, António V.Rodrigues¹^,2, Paulo Robalinho¹^,2, Susana Novais¹, João Maia¹, Paulo Marques¹^,3, D. Roma⁴^,5, J. Salvans⁴^,5, M. Canal⁴^,5, J. Ramos⁴^,5, V. Gualani⁴^,5, S. Sisteré⁴^,5, V. Martín⁴^,5, M. Nofrarias⁴^,5, Susana Silva¹ and Orlando Frazão¹

¹ INESC TEC, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
² Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
³ Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
⁴ Institut de Ciències de l’Espai (ICE, CSIC), Campus UAB, Carrer de Can Magrans s/n, 08193 Cerdanyola del Vallès, Spain
⁵ Institut d'Estudis Espacials de Catalunya (IEEC), Gran Capità, 2-4, Ed. Nexus, 08034 Barcelona, Spain

^* Corresponding author: up201604696@edu.fc.up.pt

Published online: 13 October 2022

Abstract

It is presented a study of the dependence between the free spectral range (FSR) and the cavity length in Fabry-Perot interferometers. Furthermore, the effect of frequency modulation on the FSR is studied when an optical spectrum analyser (OSA) is used as an interrogator. For low frequency range it is possible to observe this behaviour in the OSA and using an appropriate processing signal it is possible to use the white light interferometry technique.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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