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Heavily Tb<3+> doped phosphate glass core composite optical fiber and preparation method thereof

A technology of phosphate glass and composite optical fiber, applied in the field of optical fiber, can solve the problems of destroying the glass network structure and crystallization, and achieve the effect of excellent performance and avoiding the problem of glass drawing and crystallization.

Active Publication Date: 2016-11-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in highly doped Tb 3+ In phosphate glass, due to Tb 3+ The high doping concentration destroys the network structure of the glass, and the optical fiber drawn by the traditional tube rod method will still cause devitrification, so there are few highly doped Tb 3+ report on glass fiber optics

Method used

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  • Heavily Tb&lt;3+&gt; doped phosphate glass core composite optical fiber and preparation method thereof
  • Heavily Tb&lt;3+&gt; doped phosphate glass core composite optical fiber and preparation method thereof
  • Heavily Tb&lt;3+&gt; doped phosphate glass core composite optical fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) A highly doped Tb 3+ Phosphate glass preparation: the traditional melting-annealing method is adopted, and the raw material formula of the glass material is composed of the following substances in terms of weight percentage:

[0026]

[0027] Weigh the raw materials according to the above ratio, mix them evenly, melt them in a corundum crucible at 1200°C for 5 hours, and obtain a bulk phosphate core glass after precision annealing. Its Verdet constant is -0.25min / 0e·cm@632.8nm, -0.075min / 0e·cm@1064nm.

[0028] see figure 1 , is the highly doped Tb prepared in this example 3+ The light transmittance curve of phosphate glass, where the abscissa is the incident wavelength, and the ordinate is the light transmittance. Depend on figure 1 It can be seen that in the range of 400-1600nm, highly doped Tb 3+ The light transmittance of phosphate glass is greater than 80%.

[0029] see figure 2 , is the highly doped Tb prepared in this example 3+ The emission spectr...

Embodiment 2

[0035] (1) A highly doped Tb 3+ Phosphate glass preparation: the traditional melting-annealing method is adopted, and the raw material formula of the glass material is composed of the following substances in terms of weight percentage:

[0036]

[0037] Weigh the raw materials according to the above ratio, mix them evenly, melt them in a corundum crucible at 1250°C for 4 hours, and obtain a bulk phosphate core glass after precision annealing. Highly doped Tb 3+ Phosphate core glass has a light transmittance greater than 80% in the range of 400-1600nm. Under the pump of 376nm, strong green light can be emitted at 542nm. Its fluorescence lifetime is 2.4ms and its Verdet constant is -0.29min. / 0e·cm@632.8nm, -0.079min / 0e·cm@1064nm.

[0038] (2) Machining of preform: highly doped Tb after precision annealing 3+ Phosphate bulk core glass is processed into a glass cylinder with a length of 7cm and a diameter of 4.5mm, and the surface of the cylinder glass is mechanically and c...

Embodiment 3

[0041] (1) A highly doped Tb 3+ Phosphate glass preparation: the traditional melting-annealing method is adopted, and the raw material formula of the glass material is composed of the following substances in terms of weight percentage:

[0042]

[0043] Weigh the raw materials according to the above ratio, mix them evenly, melt them in a corundum crucible at 1280°C for 4 hours, and obtain a bulk phosphate core glass after precision annealing. Highly doped Tb 3+ Phosphate core glass has a light transmittance greater than 80% in the range of 400-1600nm. Under the pump of 376nm, strong green light can be emitted at 542nm. Its fluorescence lifetime is 2.3ms and its Verdet constant is -0.32min. / 0e·cm@632.8nm, -0.082min / 0e·cm@1064nm.

[0044] (2) Machining of preform: highly doped Tb after precision annealing 3+ Phosphate bulk core glass is processed into a glass cylinder with a length of 7cm and a diameter of 4.5mm, and the surface of the cylinder glass is mechanically and c...

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Abstract

The invention discloses a heavily Tb<3+> doped phosphate glass core composite optical fiber and a preparation method thereof. The cladding material of the optical fiber is K9 glass with excellent optical properties, the fiber core material is heavily Tb<3+> doped phosphate glass, the prepared fiber core glass has high transmission rate and large Verdet constant in visible-near infrared region, also has strong green light emission (542nm) and long fluorescence lifetime. The preparation steps of the optical fiber include: 1. melting of heavily Tb<3+> doped phosphate fiber core glass; 2. processing of an optical fiber perform rod; and 3. controlling of composite optical fiber. The invention employs the fiber core melting method to effectively solve the problem of crystallization caused by drawing of optical fiber with heavily Tb<3+> doped glass. The optical fiber provided by the invention can be used for magneto-optical isolators, magneto-optical modulators, magneto-optical switches and other magneto-optical devices in the optical fiber communication field, optical fiber current transducers, optical fiber magnetic field sensors and other sensing fields, as well as green (542nm) optical fiber lasers.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, in particular to a highly doped Tb 3+ Phosphate glass core composite optical fiber and its preparation method. Background technique [0002] Magneto-optical materials are the core materials of high-tech intensive products of magneto-optic technology, mainly including magneto-optic liquid materials, magneto-optic crystal materials, magneto-optic glass and magneto-optic glass fiber materials. Magneto-optical liquid materials are due to the remarkable magneto-induced birefringence effect of certain liquids, but their Coton-Monton constants are much smaller than other optical Kerr constants, so they are rarely used in practice. Although magneto-optic crystals have outstanding magneto-optical effects, their inherent defects, such as limited size and shape, and birefringence due to crystal anisotropy, limit the scope of their applications. The magneto-optical glass material has good light tran...

Claims

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Application Information

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IPC IPC(8): C03C13/04C03C3/17C03B37/027
CPCC03B37/027C03C3/17C03C13/048
Inventor 杨中民唐国武钱奇
Owner SOUTH CHINA UNIV OF TECH
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