title: Demonstration of uniform multicore fiber Bragg gratings.
abstract: Fiber Bragg gratings in multicore fibers have significant potential as compact and robust filters for research and commercial applications. With the aid of an innovative, flat-fielded Mach-Zehnder interferometer, we demonstrate deep (>30 dB) narrow (100 pm at 3 dB; 90 pm at 10 dB) notches in the outer 6 cores of a 7-core fiber at a constant wavelength ( ± 15 pm). This is a crucial step in the development of FBGs operating within multimode fibers that carry an arbitrary number of spatial modes.
authors.forename: Emma
authors.initials: E
authors.lastname: Lindley
authors.forename: Seong-Sik
authors.initials: SS
authors.lastname: Min
authors.forename: Sergio
authors.initials: S
authors.lastname: Leon-Saval
authors.forename: Nick
authors.initials: N
authors.lastname: Cvetojevic
authors.forename: Jon
authors.initials: J
authors.lastname: Lawrence
authors.forename: Simon
authors.initials: S
authors.lastname: Ellis
authors.forename: Joss
authors.initials: J
authors.lastname: Bland-Hawthorn