title: All-fiber Mach-Zehnder curvature sensor based on multimode interference combined with a long-period grating.
abstract: A novel Mach-Zehnder interferometer based on a fiber multimode interference structure combined with a long-period fiber grating (LPG) is proposed. The multimode interference is achieved through the use of a MMF section spliced between two single-mode fibers, with a length adjusted to couple a fraction of light into the cladding modes. A LPG placed after the MMF couples light back into the fiber core, completing the Mach-Zehnder interferometer. This novel configuration was demonstrated as a bending sensor.
authors.affiliation: INESC Porto, Rua do Campo Alegre 687, Portugal. ofrazao@inescporto.pt
authors.forename: O
authors.initials: O
authors.lastname: Frazão
authors.forename: J
authors.initials: J
authors.lastname: Viegas
authors.forename: P
authors.initials: P
authors.lastname: Caldas
authors.forename: J L
authors.initials: JL
authors.lastname: Santos
authors.forename: F M
authors.initials: FM
authors.lastname: Araújo
authors.forename: L A
authors.initials: LA
authors.lastname: Ferreira
authors.forename: F
authors.initials: F
authors.lastname: Farahi