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Single-mode optical fiber with ultralow loss and large effective area and preparation method thereof

An effective area, single-mode optical fiber technology, applied in the direction of multi-layer core/clad optical fiber, clad optical fiber, light guide, etc., can solve the problems of single-mode optical fiber with large loss and small effective area, so as to reduce fiber attenuation, reduce The effect of loss of light and improvement of bending resistance

Active Publication Date: 2019-07-23
JIANGSU ETERN +1
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  • Claims
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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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  • Single-mode optical fiber with ultralow loss and large effective area and preparation method thereof
  • Single-mode optical fiber with ultralow loss and large effective area and preparation method thereof
  • Single-mode optical fiber with ultralow loss and large effective area and preparation method thereof

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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

The invention relates to a single-mode optical fiber with ultralow loss and large effective area and a preparation method thereof. The optical fiber sequentially comprises an inner core layer, a sunken core layer, an outer core layer, an inner cladding layer, a sunken cladding layer and an outer cladding layer from inside to outside, wherein the inner core layer, the sunken core layer, the outer core layer, the inner cladding layer and the sunken cladding layer take silicon dioxide as a substrate material and are added with a dopant, and the outer cladding layer is pure silicon dioxide; and wherein the relative refractive index of the inner core layer is delta n1, the relative refractive index of the sunken core layer is delta n2, the relative refractive index of the outer core layer is delta n3, the relative refractive index of the inner cladding layer is delta n4, the relative refractive index of the sunken cladding layer is delta n5, and the magnitude of the relative refractive indexes are as follows: delta n1>delta n3>delta n2>delta n4>delta n5, and the material is prepared by adopting an MCVD process and an OVD process. The optical fiber of the invention has good comprehensiveperformances such as effective area, cut-off wavelength, attenuation, dispersion, bending loss and the like.

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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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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