Multiplexing optical fiber Fabry-Perot interferometers based on air-microcavities

This work was supported by the Spanish AEI TEC2016-76021-C2, FEDER Funds; and also by the ERDF – European Regional Development Fund through the Operational Programme for Competitiveness and Internationalization - COMPETE 2020 Programme and by National Funds through the Portuguese funding agency, FCT - Fundacao para a Ciencia e a Tecnologia within project ENDOR - Endoscope based on New Optical Fibre Technology for Raman Spectroscopy (POCI-01-0145-FEDER-029724). M. Bravo received funding from Marie Sklodowska-Curie grant agreement No 838143.