We investigate the coupling characteristics of photonic crystal fiber composed of two cores with different index profiles. The index curves of the fundamental modes of the two cores can cross at a desired wavelength by choosing appropriate index profiles of the cores. As a result, wavelength-selective coupling is achieved. The designed coupler can be applied as an optical fiber bandstop filter with 26-nm bandwidth.
© 2009 Chinese Optics Letters
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.5295) Fiber optics and optical communications : Photonic crystal fibers
Mingyang Chen, Yongkang Zhang, and Rongjin Yu, "Wavelength-selective coupling of dual-core photonic crystal fiber and its application," Chin. Opt. Lett. 7, 390-392 (2009)