Bending-insensitive broadband dispersion flat single-mode optical fiber

Abstract

The invention discloses a bending-insensitive broadband dispersion flat single-mode optical fiber which includes a fiber core center round layer, a first annular layer which wraps the fiber core center round layer, a second annular layer which wraps the first annular layer, and a uniform outer cladding layer which wraps the second annular layer, wherein the refractivity of the first annular layer is lower than the refractivity of the uniform outer cladding layer. The optical fiber spreads in an improved total internal reflection method. The high-order mode cutoff wavelength is smaller than 1400nm. The dispersion minimum value under a wavelength of 1400nm is larger than 2.0 ps / (nm*km). The effective area under a wavelength of 1550nm is not smaller than 70.0 mum<2>. When the mode field diameter is not smaller than 9.30 mum and the bending radius is 5mm, the bending loss is from being smaller than 0.2dB / 100rings to being smaller than 0.004dB / 100rings. Under a wavelength of 1700nm, the dispersion maximum value is from being smaller than 10.7 ps / (nm*km) to being smaller than 10.1 ps / (nm*km).

Description

field of invention [0001] The invention relates to a single-mode optical fiber, in particular to a broadband dispersion-flat single-mode optical fiber and a bend-insensitive single-mode optical fiber. Background technique [0002] The terms involved in the present invention are firstly defined below, wherein the general terms conform to the practice in this field; the special terms in this specification are explained by the customary terms. [0003] The radius of each layer of the optical fiber is measured in the unit μm, defined by the refractive index, and each specific layer has a first refractive index point and a last refractive index point. The radius from the fiber axis to the location of the first refractive index point is the inner radius of the layer; the radius from the fiber axis to the location of the last refractive index point is the outer radius of the layer. See Refractive Index Profile, the radius of the central circular segment of the core is measured fro...

AI Technical Summary

Problems solved by technology

Broadband dispersion-flattened single-mode fiber has not been commercially available for more than three decades

Dispersion-shifted fiber moves around by the zero-dispersion wavelength of the dispersion characteristic, and the bandwidth is limited

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