F. Jansen,
F. Stutzki,
C. Jauregui,
J. Limpert,
and A. Tünnermann
Avoided crossings in photonic crystal fibers
Opt. Express, 19 :13578 (July 2011)
Avoided crossings in photonic crystal fibers
Opt. Express, 19 :13578 (July 2011)
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.