Broadband single-polarization single-mode dual-core photonic crystal fiber

Abstract

This invention relates to a broadband single-polarization single-mode dual-core photonic crystal fiber. To the fiber communication and optical signal process, This scheme comprises: forming the envelop by arraying air port as regular network structure on substrate, and forming two defect fiber cores by the air port defect; arranging different air ports near the port zones on orthogonal polarization directions of fiber cross section, and keeping the cross section structure along fiber lateral direction. This invention can regulate the coupling wavelength by adjusting the larger air port diameter d' or the smaller d.

Description

technical field

[0001] The invention relates to a single-mode photonic crystal fiber, in particular to a double-core photonic crystal fiber with broadband single-polarization transmission characteristics. It is used in technical fields such as optical fiber communication and optical signal processing. Background technique

[0002] Photonic Crystal Fiber, also known as Microstructure Optical Fiber or Hole Fiber, was first manufactured by J.C.Knight et al. in R.J.Russell group in 1996 (Optics Letters, 21 , 1547-1549, 1996). Because of its flexible design and many properties that cannot be realized by ordinary optical fibers (such as single-mode conduction with no cut-off wavelength, programmable dispersion characteristics and mode field size, and high numerical aperture, etc.), it has attracted extensive attention. Photonic crystal fibers are classified into two types. The first type is the refractive index conduction photonic crystal fiber, which guides light through total...

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