title: Large-mode-area photonic crystal fiber with double lattice constant structure and low bending loss.
abstract: We report on a bendable photonic crystal fiber for short pulse high power fiber laser applications. This fiber uses a double lattice structure and enables single mode operation with a very large mode area that reaches 1454 µm² when the fiber is kept straight and 655 µm² in the fiber bent around a 10 cm radius. Single mode operation is enforced by the very large bending loss in excess of 50 dB/m experienced by the higher order modes, whilst bending loss for the fundamental mode is smaller than 0.01 dB/m. We outline the principles of our fiber design and we explore the guiding properties of the fiber.
authors: Vrije Universiteit Brussel, Department of Applied Physics and Photonics, Pleinlaan 2, 1050 Brussel, Belgium. marek.napierala@b-phot.org
authors: Marek
authors: M
authors: Napierała
authors: Tomasz
authors: T
authors: Nasilowski
authors: Elżbieta
authors: E
authors: Bereś-Pawlik
authors: Paweł
authors: P
authors: Mergo
authors: Francis
authors: F
authors: Berghmans
authors: Hugo
authors: H
authors: Thienpont