title: Mode field diameter preserving fiber tapers.
abstract: An approach for preserving the mode field diameter (MFD) in fiber tapers is demonstrated. The approach utilizes concentric dual-core fibers, which couple light from an inner core to an outer core through a taper. Fibers with a 6 μm MFD feedthrough and a 15 μm polarization maintaining feedthrough are demonstrated experimentally. Simulations of the MFD in the tapered dual-core fibers are also presented.
authors.affiliation: NKT Photonics A/S, Blokken 84, DK-3460 Birkerød, Denmark. dno@nktphotonics.com
authors.forename: D
authors.initials: D
authors.lastname: Noordegraaf
authors.forename: M D
authors.initials: MD
authors.lastname: Maack
authors.forename: P M W
authors.initials: PM
authors.lastname: Skovgaard
authors.forename: M H
authors.initials: MH
authors.lastname: Sørensen
authors.forename: J
authors.initials: J
authors.lastname: Broeng
authors.forename: J
authors.initials: J
authors.lastname: Lægsgaard