Journal
OPTICAL AND QUANTUM ELECTRONICS
Volume 47, Issue 2, Pages 441-451Publisher
SPRINGER
DOI: 10.1007/s11082-014-9926-y
Keywords
Photonic crystal fiber; Dual core; Metal wire; Polarization splitter
Funding
- National Natural Science Foundation of China (NNSFC) [61275153, 61320106014]
- Innovation Program of Graduated Student of Jiangsu Province [CXZZ11_0547]
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We theoretically investigate a dual-core photonic crystal fiber filled with metal wire. The metal wire is filled into the air-hole between the two cores. The surface plasmon polarizations excited on metal wire present strong polarization-dependent coupling to the core modes in the dual-core photonic crystal fiber. Numerical simulations demonstrate that the coupling lengths show obvious reduction compared to conventional dual-core photonic crystal fibers. By the appropriate selection of the fiber parameters, a novel polarization splitter with extinction ratio lower than dB over a 250-nm wavelength can be realized.
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