A single-mode optical fiber with ultra-low loss and large effective area and its preparation method

An effective area, single-mode optical fiber technology, applied to multi-layer core/clad optical fiber, clad optical fiber, optics, etc., can solve the problems of large loss and small effective area of ​​single-mode optical fiber

Active Publication Date: 2020-10-27
JIANGSU ETERN +1
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a single-mode fiber with ultra-low loss and large effective area and its preparation method in order to solve the technical problems of large loss and small effective area in the existing single-mode optical fiber

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  • A single-mode optical fiber with ultra-low loss and large effective area and its preparation method
  • A single-mode optical fiber with ultra-low loss and large effective area and its preparation method
  • A single-mode optical fiber with ultra-low loss and large effective area and its preparation method

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Embodiment Construction

[0048] The present invention is described in further detail now in conjunction with accompanying drawing.

[0049] A single-mode optical fiber with ultra-low loss and large effective area. From the inside to the outside, there are inner core layer, outer core layer, sunken core layer, inner cladding layer, sunken cladding layer and outer cladding layer, wherein: inner core layer, sunken core layer , the outer core layer, the inner cladding layer, and the sunken cladding layer use silicon dioxide as the base material and add dopants; the radius of the inner core layer is r 1 =4~6μm, the relative refractive index of the inner core layer is Δn 1 =0.35%~0.55%; the radius of the sunken core layer is r 2 =6~9μm, the relative refractive index of the sunken core layer Δn 2 =-0.25%~-0.15%; the radius of the outer core layer is r 3 =9~15μm, the relative refractive index of the outer core layer is Δn 3 =0.15%~0.3%; the radius of the inner cladding is r 4 =15~20μm, the relative refra...

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Abstract

A single-mode optical fiber that has ultra-low loss and a large effective area and a preparation method therefor. The optical fiber has an inner core layer, a depressed core layer, an outer core layer, an inner cladding layer, a depressed cladding layer and an outer cladding layer that are arranged successively from the inside to the outside, wherein: the inner core layer, the depressed core layer, the outer core layer, the inner cladding layer, and the depressed cladding layer use silica as a base material and have a dopant added thereto, and the outer cladding layer is pure silica; and the relative refractive index of the inner core layer is Δn1, the relative refractive index of the depressed core layer is Δn2, the relative refractive index of the outer core layer is Δn3, the relative refractive index of the inner cladding layer is Δn4, the relative refractive index of the depressed cladding layer is Δn5, and the sizes of the relative refractive indices are: Δn1>Δn3>Δn2>Δn4>Δn5. The present optical fiber is prepared by using an MCVD process and an OVD process, and the effective area, cut-off wavelength, attenuation, dispersion, bending loss and other comprehensive properties thereof are good.

Description

technical field [0001] The invention relates to a single-mode optical fiber with ultra-low loss and large effective area and a preparation method thereof, belonging to the technical field of optical fiber transmission. Background technique [0002] Optical fiber is the medium of light transmission. After the optical signal is transmitted through the optical fiber, the reduction of optical power due to absorption, scattering, optical fiber structure, bending and other reasons is called optical fiber loss. Optical fiber loss is an important indicator of optical fiber transmission. The transmission of optical fiber communication The distance has a decisive influence, and the level of optical fiber loss directly affects the transmission distance or the distance between relay stations. Therefore, reducing optical fiber loss has great practical significance for optical fiber communication. Ultra-low loss optical fiber is mainly achieved by adopting pure silicon core design, but fo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036G02B6/02
CPCG02B6/02019G02B6/03638
Inventor 莫思铭李凡眭立洪张国栋周莉李想
Owner JIANGSU ETERN
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