Yb-doped fiber and manufacturing method thereof

A technology of ytterbium-doped optical fiber and optical fiber, which is applied in the direction of cladding optical fiber, multi-layer core/clad optical fiber, light guide, etc., can solve the problems of central concave optical fiber refractive index and offset, and achieve the effect of high cladding absorption

Active Publication Date: 2015-08-26
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If a large amount of phosphorus pentoxide is doped, because phosphorus pentoxide volatilizes severely at high temperature, it is easy to form a centra

Method used

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  • Yb-doped fiber and manufacturing method thereof
  • Yb-doped fiber and manufacturing method thereof
  • Yb-doped fiber and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1: A pure quartz glass liner with a specification of 31mm (outer diameter of the tube)*1.8mm (thickness of the tube)*600mm (length of the tube) is fixed on an MCVD lathe, and a pure silicon outer cladding is deposited according to the design, and the deposition temperature is 1780°C , the flow rate of oxygen is 1000sccm, the flow rate of silicon tetrachloride is 400sccm, and the inner cladding layer is deposited after the outer cladding is deposited. , and then deposit the loose porous structure of the core layer, the deposition temperature is 1400°C, the flow rate of oxygen is 800 sccm, the flow rate of silicon tetrachloride is 200 sccm, and the flow rate of phosphorus oxychloride is 100 sccm. After the deposition is completed, the liner is removed, and the prepared Al and Yb solutions are poured Immerse in the liner for 4 hours, in which the concentration of aluminum chloride is 0.55mol / L, and the concentration of ytterbium chloride is 0.1mol / L. After the im...

Embodiment 2

[0034] Embodiment 2: A pure quartz glass liner with a specification of 31mm (outer diameter of the tube)*1.8mm (thickness of the tube)*600mm (length of the tube) is fixed on an MCVD lathe, and a pure silicon outer cladding is deposited according to the design, and the deposition temperature is 1780°C , the flow rate of oxygen is 1000sccm, the flow rate of silicon tetrachloride is 400sccm, and the inner cladding layer is deposited after the outer cladding is deposited. , and then deposit the loose porous structure of the core layer, the deposition temperature is 1400°C, the flow rate of oxygen is 800 sccm, the flow rate of silicon tetrachloride is 200 sccm, and the flow rate of phosphorus oxychloride is 70 sccm. After the deposition is completed, the liner is removed, and the prepared Al and Yb solutions are poured Immerse in the liner for 4 hours, in which the concentration of aluminum chloride is 0.65mol / L, and the concentration of ytterbium chloride is 0.12mol / L. After immers...

Embodiment 3

[0035] Embodiment 3: A pure quartz glass liner with a specification of 31mm (outer diameter of the tube)*1.8mm (thickness of the tube)*600mm (length of the tube) is fixed on an MCVD lathe, and a pure silicon outer cladding is deposited according to the design, and the deposition temperature is 1780°C , the flow rate of oxygen is 1000sccm, the flow rate of silicon tetrachloride is 400sccm, and the inner cladding layer is deposited after the outer cladding is deposited. , and then use the vapor phase method to deposit the vitrified core layer structure, the deposition temperature is 1900°C, the flow rate of oxygen is 800 sccm, the flow rate of silicon tetrachloride is 100 sccm, the flow rate of aluminum chloride is 100 sccm, the flow rate of ytterbium chloride is 100 sccm, the flow rate of phosphorus oxychloride is 50 sccm, and the flow rate of Freon 20sccm, after the core layer is deposited, it is melted and shrunk into a preform, and the shrinkage temperature is 2300°C. The co...

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Abstract

The invention discloses an Yb-doped fiber and a manufacturing method thereof. The Yb-doped fiber comprises a core layer at least containing Yb and Al, a glass matrix cladding surrounding the core layer, and a low-refractive index coating layer surrounding the glass matrix cladding. The glass matrix cladding comprises an inner cladding and an outer cladding. The refractive index of the inner cladding is lower than that of the core layer, and higher than that of the outer cladding. The inner cladding uses Ge, P, Al, and F as doping agents. The core layer is doped with F and P as doping agents. A MCVD method is used to manufacture a performing bar, fiber-drawing temperature is controlled, so optical fibers are drawn under relatively low tension, and required fibers are obtained. Through improving the refractive index of the inner cladding, relatively through reducing the difference between the refractive index of the core layer and the refractive index of the inner cladding, relatively high Al and Yb doping concentration in a fiber core is maintained, so as to reduce core layer NA under the condition that relatively high fiber cladding absorption coefficient is maintained, and single-mode output is realized, that is, fiber quality factor is proximity to one. The manufacturing method can manufacture a high-concentration Yb-doped fiber, and realizes relatively high cladding absorption coefficient.

Description

technical field [0001] The invention belongs to the technical field of optical fiber manufacturing, and more specifically relates to an ytterbium-doped optical fiber and a preparation method thereof. Background technique [0002] Rare earth-doped fibers are formed by adding rare earth elements to the core region of the optical fiber, which has the function of optical amplification and can be applied to light sources such as lasers and optical amplifiers and transmission systems. Among them, the fiber laser made of fiber containing rare earth element ytterbium (Yb), that is, ytterbium-doped fiber, has good beam quality and can obtain high-power output light, and the oscillation wavelength of the output light of the fiber laser is different from that of existing high-power lasers. A Nd-YAG laser is basically the same, around 1μm. Therefore, Yb-doped lasers inherit the material processing purposes of traditional lasers such as welding, marking, and cutting. [0003] The proce...

Claims

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Application Information

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IPC IPC(8): G02B6/02G02B6/036
CPCG02B6/02G02B6/03622
Inventor 陈苏杨玉诚曹蓓蓓
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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