Hybrid Mach-Zehnder interferometer manufactured by femtosecond laser multiscan technique

Roldán Varona, Pablo; Pallarés Aldeiturriaga, David; Rodríguez Cobo, Luis; López Higuera, José Miguel

doi:10.1117/12.2538813

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HybridMachZehnder.pdf (4.145Mb)

Identificadores

URI: http://hdl.handle.net/10902/18303

DOI: 10.1117/12.2538813

ISSN: 0277-786X

ISSN: 1996-756X

Fecha

2019-08-28

Derechos

© 2019 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Publicado en

Proceedings of SPIE, 2019, 11199, 111992N

Seventh European Workshop on Optical Fibre Sensors (EWOFS 2019), Limassol, Chipre, 2019

Editorial

SPIE Society of Photo-Optical Instrumentation Engineers

Enlace a la publicación

https://doi.org/10.1117/12.2538813

Palabras clave

Femtosecond laser

Microstructure fabrication

Mach-Zehnder

Waveguide

Fiber Bragg grating

Resumen/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.