title: Birefringent all-solid hybrid microstructured fiber.
abstract: We report the characterization of a birefringent all-solid hybrid microstructured fiber, in which the core-modes are guided by both the photonic bandgap (PBG) effect and total internal reflection (TIR). Due to the twofold symmetry, modal birefringence of 1.5 x 10(-4) and group birefringence of 2.1 x 10(-4) were measured at 1.31 microm, which is in the middle of the second bandgap. The band structure was calculated to be different from conventional 2-D PBG fibers due to the 1-D arrangement of high-index regions. The bend loss has a strong directional dependence due to the coexistence of the two guiding mechanisms. The fiber has two important properties pertinent to PBG fibers; spectral filtering, and chromatic dispersion specific to PBG fibers. The number of high-index regions, which trap pump power (by index guiding) when the fiber is used in cladding-pumped fiber lasers, is greatly reduced so that this fiber should enable efficient cladding pumping. This structure is suitable for linearly-polarized, cladding-pumped fiber lasers utilizing the properties of PBG fibers.
authors: Optical Fibre Technology Centre, School of Physics, University of Sydney, Eveleigh, NSW 1430, Australia. ryugoto@physics.usyd.edu.au
authors: Ryuichiro
authors: R
authors: Goto
authors: Stuart D
authors: SD
authors: Jackson
authors: Simon
authors: S
authors: Fleming
authors: Boris T
authors: BT
authors: Kuhlmey
authors: Benjamin J
authors: BJ
authors: Eggleton
authors: Kuniharu
authors: K
authors: Himeno
mesh_terms: D001718:Birefringence; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity