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a high gain tm 3+ /ho 3+ Co-doped multi-component germanate glass single-mode optical fiber and its preparation method

A technology of germanate glass and single-mode optical fiber, which is applied in the field of optical fiber, can solve the problem of low gain of co-doped germanate glass single-mode optical fiber, and achieve the effect of good anti-devitrification stability and low OH- content

Active Publication Date: 2021-07-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently reported Tm 3+ / Ho 3+ Co-doped germanate glass single-mode fiber has low gain (<2.5 dB / cm)

Method used

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  • a high gain tm <sup>3+</sup> /ho <sup>3+</sup> Co-doped multi-component germanate glass single-mode optical fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: A high-gain Tm 3+ / Ho 3+ The preparation process of co-doped germanate glass single-mode optical fiber is as follows:

[0021] (1) Weigh the cladding and core glass raw materials according to the mass percentage of each oxide composition: BaO 5%, Ga 2 o 3 15%, La 2 o 3 5%, Y 2 o 3 5%, Lu 2 o 3 1%, GeO 2 margin. The core glass is doped with 5 mass % Tm 2 o 3 and 1.25% Ho 2 o 3 .

[0022] (2) Melt the cladding and core glass separately, put the corresponding raw materials (cladding or core glass) weighed in step (1) into an agate mortar and mix them thoroughly, then pour them into a corundum crucible and heat at 1350 °C For melting. The melting time is 5 hours, and the high-purity O 2 Carry out atmosphere protection, and pass 30 minutes Cl 2 Remove water, then stir, homogenize, and clarify to obtain molten glass, then pour it into a pre-heated copper mold for molding, and quickly transfer it to an annealing furnace for precision annealing,...

Embodiment 2

[0024] Example 2: A high-gain Tm 3+ / Ho 3+ The preparation process of co-doped germanate glass single-mode optical fiber is as follows:

[0025] (1) Weigh the cladding and core glass raw materials according to the mass percentage of each oxide composition: BaO 10%, Ga 2 o 3 7%, La 2 o 3 10%, Y 2 o 3 1%, Lu 2 o 3 5%, GeO 2 margin. The core glass is doped with 5 mass % Tm 2 o 3 and 1.25 %Ho 2 o 3 .

[0026] (2) Melt the cladding and core glass separately, put the corresponding raw materials (cladding or core glass) weighed in step (1) into an agate mortar and mix thoroughly, then pour into a corundum crucible and heat at 1450 °C For melting. The melting time is 7 hours, and the high-purity O 2 Carry out atmosphere protection, and pass 30 minutes Cl 2 Remove water, then stir, homogenize, and clarify to obtain molten glass, then pour it into a pre-heated copper mold for molding, and quickly transfer it to an annealing furnace for precision annealing, keep it a...

Embodiment 3

[0028] Example 3: A high-gain Tm 3+ / Ho 3+ The preparation process of co-doped germanate glass single-mode optical fiber is as follows:

[0029] (1) Weigh the cladding and core glass raw materials according to the mass percentage of each oxide composition: BaO 7 %, Ga 2 o 3 10%, La 2 o 3 7%, Y 2 o 3 2%, Lu 2 o 3 3%, GeO 2 margin. The core glass is doped with 3 mass % Tm 2 o 3 and 0.5 %Ho 2 o 3 .

[0030] (2) Melt the cladding and core glass separately, put the corresponding raw materials (cladding or core glass) weighed in step (1) into an agate mortar and mix thoroughly, then pour into a corundum crucible, and heat at 1400 °C For melting. The melting time is 5 hours, and the high-purity O 2 Carry out atmosphere protection, and pass 30 minutes Cl 2 Remove water, then stir, homogenize, and clarify to obtain molten glass, then pour it into a pre-heated copper mold for molding, and quickly transfer it to an annealing furnace for precision annealing, keep it ...

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Abstract

The present invention provides a high gain Tm 3+ / Ho 3+ Co-doped germanate glass single-mode optical fiber and its preparation method. The optical fiber is composed of a multi-component germanate glass, and the core is preferably doped with 5% Tm 2 o 3 and 1.25%Ho 2 o 3 . The preparation method is to melt the bulk cladding and core glass separately, and pass high-purity O 2 Carry out atmosphere protection, and pass through Cl 2 Remove water and stir. The single-mode optical fiber is drawn by the traditional tube-and-rod method. First, the melted bulk germanate glass is mechanically cold-processed into the designed size, and then the core rod is drawn once to obtain a thin core rod. Finally, the thin core rod and the The cladding glass tube constitutes the optical fiber preform and is drawn in the drawing tower. Tm of the present invention 3+ / Ho 3+ The co-doped germanate glass single-mode fiber has a gain of up to 3.5 dB / cm at 2.05 μm, and is expected to be used in high-power and ultra-compact single-frequency fiber lasers and high-repetition fiber lasers.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, in particular to a high-gain Tm 3+ / Ho 3+ Co-doped germanate glass single-mode optical fiber and its preparation method. Background technique [0002] The 2 μm band (1.9-2.5 μm) laser is located within the safe range of human eyes. Water has a strong absorption peak in this band, and it is also one of the atmospheric transmission windows. It is used in laser radar, atmospheric monitoring, laser medical treatment, remote sensing and mid-infrared It has a wide range of military and civilian applications such as laser pump sources. However, the solubility of rare earth ions in conventional silica fibers is low, and the unity gain of silica fibers in the 2.05 μm band is low. Multicomponent glasses with high solubility of rare earths have attracted extensive attention from researchers. Silicate glasses have higher phonon energies (~ 1100 cm -1 ), the infrared transmission range is narrow (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C13/04C03B37/012C03B37/027
CPCC03B37/01211C03B37/027C03B2201/78C03C13/048
Inventor 杨中民唐国武钱奇
Owner SOUTH CHINA UNIV OF TECH