title: Doped photonic bandgap fibers for short-wavelength nonlinear devices.
abstract: Microstructured photonic bandgap fibers with a doped honeycomb cladding structure and the guiding defect defined by the absence of doping are proposed as nonlinear optical fibers for short wavelengths. It is shown that zero-dispersion wavelengths below 500 nm and corresponding effective areas of 1-2 microm2 can be obtained if structures with interhole distances near 600 nm can be fabricated. The cutoff wavelength for guidance of second-order modes can be controlled by variation of the radius and index contrast of the doped regions.
authors.affiliation: Research Center COM, Technical University of Denmark, Building 345v, DK-2800 Kgs. Lyngby, Denmark. jl@com.dtu.dk
authors.forename: Jesper
authors.initials: J
authors.lastname: Laegsgaard
authors.forename: Anders
authors.initials: A
authors.lastname: Bjarklev