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Hybrid Mach-Zehnder interferometer manufactured by femtosecond laser multiscan technique

Abstract: In this paper, a 6 mm hybrid Mach-Zehnder Interferometer (MZI) has been manufactured within a standard optical fiber using multiscan inscription with femtosecond laser. This technique allows the employ of cladding waveguides (CWG) as sensing arms for the interferometer. Refracted Near Field (RNF) profilometry and Quantitative Phase Microscopy (QPM) consistently suggest that CWG exhibit a smooth Type I refractive index change (RIC) that increases with the number of scans. This makes the scan number a potential way to control the coupling and Free Spectral Range (FSR) of the manufactured MZI. Its combination with a fiber Bragg grating (FBG) inscribed in the core makes possible to discriminate between different parameters.

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Authorship: Roldán Varona P., Pallarés-Aldeiturriaga D., Rodríguez-Cobo L., López-Higuera J.,

Congress: European Workshop on Optical Fibre Sensors (7º : 2019, Limassol, Chipre)

Publisher: SPIE Society of Photo-Optical Instrumentation Engineers

Publication date: 28/08/2019

No. of pages: 4

Publication type: Conference object

DOI: 10.1117/12.2538813

ISSN: 0277-786X,1996-756X

Spanish project: TEC2016-76021-C2-2-R

Publication Url: https://doi.org/10.1117/12.2538813

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Authorship

PABLO ROLDAN VARONA

DAVID PALLARES ALDEITURRIAGA

LUIS RODRIGUEZ COBO

JOSE MIGUEL LOPEZ HIGUERA

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