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.
© 2010 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: September 11, 2009
Revised Manuscript: December 12, 2009
Manuscript Accepted: January 5, 2010
Published: February 4, 2010
Xiao-Hui Fang, Ming-Lie Hu, Yan-Feng Li, Lu Chai, Ching-Yue Wang, and Aleksei M. Zheltikov, "Hybrid multicore photonic-crystal fiber for in-phase supermode selection," Opt. Lett. 35, 493-495 (2010)