title: Hybrid multicore photonic-crystal fiber for in-phase supermode selection.
abstract: We examine a hybrid multicore photonic-crystal fiber, where the cores are separated by high-index solid rods and the microstructure cladding is built on a hexagonal lattice of air holes in silica. Antiresonant reflection from high-index solid rods is shown to assist the field confinement in the cores of such a fiber. When the cores are doped with a laser-active material, the maximum gain is achieved for the in-phase supermode, which translates into a high-quality Gaussian-like beam profile in the far field.
authors.affiliation: 1Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Science and Technology of Ministryof Education, College of Precision Instruments and Opto-electronics Engineering, Tianjin University,300072 Tianjin, China.
authors.forename: Xiao-Hui
authors.initials: XH
authors.lastname: Fang
authors.forename: Ming-Lie
authors.initials: ML
authors.lastname: Hu
authors.forename: Yan-Feng
authors.initials: YF
authors.lastname: Li
authors.forename: Lu
authors.initials: L
authors.lastname: Chai
authors.forename: Ching-Yue
authors.initials: CY
authors.lastname: Wang
authors.forename: Aleksei M
authors.initials: AM
authors.lastname: Zheltikov