Open AccessFiber in-line Mach-Zehnder interferometer based on a pair of short sections of waveguide
Author(s) -
W. W. Li,
D. N. Wang,
Bingjie Xu
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.011496
Subject(s) - optics , mach–zehnder interferometer , interferometry , cladding (metalworking) , materials science , waveguide , optical fiber , inscribed figure , graded index fiber , fiber optic sensor , photonic crystal fiber , refractive index , polarization maintaining optical fiber , physics , geometry , mathematics , metallurgy
A fiber in-line Mach-Zehnder interferometer based on a pair of femtosecond laser inscribed short sections of waveguide is presented. One short waveguide directs part of the propagating light from the fiber core to the cladding-air interface, and experiences multiple total internal reflections before taking back to the fiber core by the other short waveguide. The device is robust in structure, can be fabricated in a fast way and with a flexible manner, and has the capability of ambient refractive index sensing, which makes it highly desirable for many "lab-in-fiber" applications.