Single-mode optical fiber and manufacturing method thereof

Abstract

The invention provides a single-mode optical fiber. The single-mode optical fiber includes a core layer and a cladding layer, the outer side of the core layer is provided with the cladding layer, thecladding layer includes a first cladding layer and a second cladding layer, the inner side of the first cladding layer is connected with the outside of the core layer, and the outer side of the firstcladding layer is connected with the inner side of the second cladding layer; and the invention further provides a manufacturing method of the single-mode optical fiber, the manufacturing method includes the following steps that step 1) powder-like loose bodies are prepared; step 2) the powder-like loose bodies are treated; step 3) fiber prefabrication rods are manufactured; step 4) the fiber prefabrication rods are treated; and step 5) wiredrawing is conducted. The single-mode optical fiber and the manufacturing method thereof have the beneficial effects that multiple variable scan be adjusted in the aspects of fiber design and manufacturing, the multiple variables are correspondingly a core layer diameter r1, the first cladding layer diameter r2 and refractive index difference valves [delta] 1, [delta] 2, [delta] 3 and [delta] 4, by changing the valves, the internal stress in fiber wiredrawing is reduced advantageously, Rayleigh scattering of the fiber is reduced, and loss valves ofthe fiber are further decreased as a whole.

Description

technical field [0001] The invention belongs to the field of communication optical fiber manufacturing, and in particular relates to a single-mode optical fiber and a manufacturing method thereof. Background technique [0002] With the development of optical communication technology, single-mode fiber has been widely used in the world, especially G.652 single-mode fiber, the laying volume of the world has reached more than 1 billion core kilometers. In order to solve a series of problems in the development of optical communication, single-mode optical fibers such as G.655 dispersion-shifted optical fiber, G.657 bend-insensitive optical fiber, and G.654 ultra-low loss optical fiber were invented successively. With the maturity of wavelength division multiplexing technology, dispersion is no longer the main problem of optical fiber transmission. At present, the development direction of optical fiber is mainly towards lower loss and better bending performance. At the same time,...

AI Technical Summary

Problems solved by technology

The presence of dopants will also cause density fluctuations and viscosity fluctuations of quartz glass, thereby increasing the Rayleigh scattering of the optical fiber and increasing the transmission loss of the optical fiber.

Increasing the refractive index difference between the core and the cladding is an effective means to improve the bending performance of the fiber, but this will inevitably increase the doping concentration of impurities in the core and cladding, which will increase the transmission loss of the fiber

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