In-fibre Mach-Zehnder configuration based on fibre multimode interference structure combined with a long period grating

O. Frazão; J. Viegas; P. Caldas; F. M. Araújo; L. A. Ferreira; J. L. Santos; F. Farahi

doi:10.1117/12.738610

2 July 2007 In-fibre Mach-Zehnder configuration based on fibre multimode interference structure combined with a long period grating

O. Frazão, J. Viegas, P. Caldas, F. M. Araújo, L. A. Ferreira, J. L. Santos, F. Farahi

Author Affiliations +

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66192H (2007) https://doi.org/10.1117/12.738610
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

A novel Mach-Zehnder interferometer based on a fibre multimode interference structure combined with a long period fibre grating is proposed. The multimode interference is achieved through the use of a multimode fibre section spliced between two single-mode fibres, with a length adjusted to couple a fraction of light into the cladding modes. A LPG placed after the multimode fibre couples light back into the fibre core completing the Mach-Zehnder interferometer. This novel configuration was demonstrated as a bending sensor.

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O. Frazão, J. Viegas, P. Caldas, F. M. Araújo, L. A. Ferreira, J. L. Santos, and F. Farahi "In-fibre Mach-Zehnder configuration based on fibre multimode interference structure combined with a long period grating", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66192H (2 July 2007); https://doi.org/10.1117/12.738610

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