title: Avoided crossings in photonic crystal fibers.
abstract: The impact of avoided crossings (also known as anti-crossings) in single and double-clad large mode area Photonic Crystal Fibers (PCFs) suitable for high-power laser systems is evaluated numerically. It is pointed out that an inappropriate choice of pump core diameter, bending radius and/or index depression may lead to avoided crossings that manifest themselves in unwanted deformations of the output beam.
authors: Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Jena, Germany. jansen@iap.uni-jena.de
authors: Florian
authors: F
authors: Jansen
authors: Fabian
authors: F
authors: Stutzki
authors: Cesar
authors: C
authors: Jauregui
authors: Jens
authors: J
authors: Limpert
authors: Andreas
authors: A
authors: Tünnermann
mesh_terms: D017076:Computer-Aided Design; D003460:Crystallization; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D017785:Photons