Yb3+ doped tellurate glass doubly coated fiber and preparing method thereof

A technology of double-clad optical fiber and tellurite glass, applied in glass manufacturing equipment, optics, light guide, etc., can solve the problems of small adjustable range of double-clad optical fiber, ion clusters, affecting the absorption efficiency of pump light, etc. , to achieve the effect of large gain performance and tunable range, high rare earth doping concentration, and simple drawing process

Inactive Publication Date: 2005-04-06
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

due to Yb 3+ Ions are prone to clustering in the quartz matrix, causing a sharp decrease in the fluorescence lifetime, which seriously affects the absorption efficiency of the pump light
[0006] (2)Yb 3+ Less gain in quartz matrix
[0007] (3) The adjustable range of the double-clad optical fiber composition of the quartz matrix is ​​small
[0008] (4) The preparation process of double-clad optical fiber with quartz matrix is ​​

Method used

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  • Yb3+ doped tellurate glass doubly coated fiber and preparing method thereof
  • Yb3+ doped tellurate glass doubly coated fiber and preparing method thereof
  • Yb3+ doped tellurate glass doubly coated fiber and preparing method thereof

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preparation example Construction

[0043] (2) Preparation of fiber core and inner cladding glass. According to the above principles, select the formula in Table 1, mix the powdered raw materials evenly, and melt them in a quartz crucible or platinum crucible. The melting temperature is 700-900 ° C. The raw materials are completely melted. The liquid is poured on a preheated iron mold. Then quickly put the glass into the glass that has been heated to the glass transition temperature (T g ) in a nearby muffle furnace for annealing. The annealing process is: at the glass transition temperature (T g ) nearby for 2 hours, then cool down to 100°C at a rate of 2-5°C / hour, and then turn off the power of the muffle furnace to automatically cool down to room temperature. Remove the glass sample after complete cooling. Except for the different formulations, the core and inner cladding are melted in exactly the same way.

[0044] (3) Production of preforms. The above-prepared core glass is cut, ground, and polished i...

specific Embodiment

[0048] The first step: select a suitable fiber core and inner cladding formula (mol%), see Table 2;

[0049] The second step: the process of melting the core and inner cladding of tellurite glass: (1) Preparation of core glass: high-purity TeO 2 , ZnO, PbO, Na 2 O, K 2 O, La 2 o 3 and Yb 2 o 3 After the powdered raw materials are mixed evenly according to the core formula, they are placed in a platinum crucible and melted in a silicon carbide rod electric furnace. During the glass melting process, dry oxygen is introduced for atmosphere protection. melt

[0050] TeO 2

PbO

ZnO

La 2 o 3

K 2 o

Na 2 o

Yb 2 o 3

n

T f (℃)

No.

one

fiber

the core

65

20

5

4.5

0

5

0.5

2.092

442

Group

Inside

Bag

layer

65

18

5

...

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Abstract

It is a tellurate glass double-layer fiber mixed with Yb#+[3+] and its process method, which uses tellurate glass system as fiber core material of the fiber and uses tellurate glass system with matching refractive index, expansion index and intenerate temperature with the core material as inner layer. The method is the following: to choose matchable fiber core and inner layer glass materials; to melt them; to process pre-made bar to form core composite; finally to do fiber pulling to plastic package layer coating and fixing to make the double-layer fiber.

Description

technical field [0001] The present invention relates to double-clad optical fiber, especially a kind of Yb 3+ Doped tellurite glass double-clad optical fiber and its preparation method. Background technique [0002] A fiber laser is a laser resonator composed of an optical fiber doped with certain rare earth elements and an optical feedback element. Under the action of pump light, the doped optical fiber generates stimulated emission in the medium and emits a certain wavelength of laser light. It has low Threshold, high efficiency, narrow linewidth, tunability and other advantages. The original fiber laser directly coupled the pump light into the fiber core with a diameter of less than 10 μm, resulting in low coupling efficiency and low output power of the fiber laser, which limited its application range. In order to improve the coupling efficiency, in recent years, a double-clad fiber has been developed internationally. Because it has an inner cladding with a large cross-...

Claims

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Application Information

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IPC IPC(8): C03B37/012G02B6/13
CPCC03B2201/60C03B37/01268
Inventor 汪国年戴世勋张军杰姜中宏
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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