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High non-linearity photon crystal optical fiber with color dispersion plainness characteristic in long wavelength

A photonic crystal fiber, high nonlinear technology, applied in the field of optical fiber communication and optical signal processing, can solve the problem of restricting the use of high nonlinear photonic crystal fiber, and achieve the effect of wavelength adjustable dispersion flat and low dispersion slope

Active Publication Date: 2009-12-30
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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Problems solved by technology

However, the total reflection light-guiding high nonlinear photonic crystal fiber with a simple pure silicon core and a high duty ratio cladding structure has a zero dispersion below 1000nm. Dispersion coefficient, which limits the use of highly nonlinear photonic crystal fibers at long wavelengths

Method used

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  • High non-linearity photon crystal optical fiber with color dispersion plainness characteristic in long wavelength
  • High non-linearity photon crystal optical fiber with color dispersion plainness characteristic in long wavelength
  • High non-linearity photon crystal optical fiber with color dispersion plainness characteristic in long wavelength

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Embodiment Construction

[0026] The working principle of the present invention and various embodiments of this type of optical fiber will be described in detail below with reference to the accompanying drawings.

[0027] In order to study the light-guiding properties of highly nonlinear photonic fibers, we have adopted the Full-vectorial Plane-wave method (PWM) and the Finite-difference Method (Finite-difference Method) using the ideal matching layer absorption boundary (PML) respectively. , FDM) [S. Guo et al. Opt. Express 12 (2004) p.3341] to calculate the effective refractive index and dispersion distribution characteristics of the optical fiber with the structural characteristics.

[0028] As an example one, figure 1 A typical highly nonlinear photonic crystal fiber with low dispersion coefficient and flat dispersion characteristics in the C-band is listed. The structural characteristics of the core layer and the cladding layer are: a pure silica fiber core layer with a low duty ratio hole Defect...

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Abstract

The present invention relates to a nonlinear fiber, in particular to a photonic crystal fiber with high nonlinearity and flattened dispersion at long wavelength, and pertains to the field of fiber communication and optical signal processing. The structure of the present invention is characterized in that a low duty-cycle hole defect structure is provided in the pure-quartz fiber core zone, and the fiber cladding comprises a high duty-cycle hole periodic structure. The nonlinear photonic crystal fiber in the present invention, compared with the simple total-reflection nonlinear photonic crystal fiber, overcomes the bottleneck that zero dispersion can only be adjusted at short wavelength, and realizes that zero dispersion can be adjustable in a wide range of spectrum and the property of flattened dispersion is provided at long wavelength. The invention can be widely applied to optical devices in the field of communication-wavelength photonic technology, such as the multi-wavelength light source for long wavelength communication, the quantum information source and so on.

Description

technical field [0001] The invention relates to a nonlinear optical fiber, in particular to a highly nonlinear photonic crystal optical fiber with dispersion flat characteristics at long wavelengths, which belongs to the field of optical fiber communication and optical signal processing. Background technique [0002] Photonic Crystal Fiber (Photonic Crystal Fiber), also known as microstructure fiber or holey fiber, is a new type of fiber that has attracted widespread attention in recent years [J.C.Knight, et al.Opt.Lett., 21(1996) p.1547. ; Errata, Opt.Lett.22(1997) p.484], its cross-section has a more complex refractive index distribution, usually the cladding region of this type of fiber contains air holes that run through the entire fiber in different arrangements, these The size of the hole is roughly on the same order of magnitude as the wavelength of the fiber, and the light wave can be confined to propagate in its core region. According to different light guiding mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G02F1/35
Inventor 童维军韦会峰汪洪海罗杰
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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