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Germanate glass cladding/semiconductor core composite fiber

A technology of germanate glass and composite materials, which is applied in the direction of cladding optical fiber, optical waveguide light guide, glass manufacturing equipment, etc., can solve the problem of composite optical fiber without obtaining performance, and achieve excellent infrared transmission performance, excellent wire drawing performance, and good The effect of physical and chemical properties

Active Publication Date: 2017-12-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In 2008, the J.Ballato research group of Clemson University in the United States proposed for the first time to introduce semiconductor materials into the traditional glass optical fiber structure, and use the tube rod method or powder tube method to prepare glass-clad semiconductor core fibers, but they are only Preliminary experiments have been done, but no composite fiber with excellent performance has been obtained.
So far, there have been no reports of germanate glass used as cladding glass to prepare composite fiber optics. The combination of germanate glass with excellent optical properties and physical and chemical properties and semiconductor materials with rich optical, electrical, and thermal functions Effectively combined and drawn into composite fiber optics, it has broad application prospects in nonlinear optics, sensing, photoelectric detection, infrared power transmission, biomedical and other fields, especially in the mid-infrared field

Method used

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  • Germanate glass cladding/semiconductor core composite fiber
  • Germanate glass cladding/semiconductor core composite fiber
  • Germanate glass cladding/semiconductor core composite fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The preparation and method of the multi-component germanate glass cladding / germanium semiconductor core fiber are as follows:

[0023] (1) The traditional fusion-annealing method is used to melt bulk multi-component germanate clad glass. In terms of mass percentage, the glass raw material formula is: BaO 15%, Ga 2 o 3 15%, GeO 2 65%, La 2 o 3 5% (purity 99.99%). Weigh 800 g of raw materials according to the proportion, mix them evenly, add them into a platinum crucible, and dissolve them at 1400°C for 5 hours. During this period, the reaction atmosphere method is used to remove water, and at the same time, it is protected by oxygen. After molding, keep it warm at 600°C for 20 hours, and then cool to room temperature with the furnace. The multicomponent germanate glass transition temperature T g is 678°C (such as figure 1 DSC measurement), the infrared transmission performance is shown in figure 2 middle.

[0024] (2) Machining of cladding glass: After prec...

Embodiment 2

[0029] The difference between this embodiment and Embodiment 1 lies in that the formulation of the multi-component germanate cladding glass and the semiconductor material are different. The multi-component germanate clad glass is calculated by mass percentage, and the glass raw material formula is: BaO 20%, Ga 2 o 3 17%, GeO 2 60%, La 2 o 3 3% (purity 99.99%). Indium antimonide (InSb) semiconductor is used as the core material of the optical fiber. The melting point of InSb is 527°C, and it is the direct bandgap semiconductor with the narrowest bandgap among III-V semiconductors. The forbidden band width of InSb at room temperature is 0.18eV, and its transmission spectrum covers the entire mid-wave infrared band (7-30μm). In terms of energy band characteristics, the conduction band of InSb has strong non-parabolic properties, which makes it have a large nonlinear effect, especially three-wave mixing. In addition, InSb has high carrier mobility, high photon absorption e...

Embodiment 3

[0031] The difference between this embodiment and Embodiment 1 lies in the core semiconductor material. The GaSb semiconductor is selected as the fiber core. The GaSb semiconductor has a melting point of 712°C and a bandgap width of 0.726eV (1709nm) at room temperature. It can use energy level transitions to emit light and achieve 1.7-1.8μm near-infrared emission. GaSb core fiber. In addition to having luminescent properties, undoped GaSb will exhibit p-type semiconductor characteristics and high hole mobility. GaSb core fibers or thinner micro-nano fibers can be used for metal-oxide-semiconductor field-effect transistors (MOSFETs) and other optoelectronic devices. Bulk GaSb is filled into cylindrical holes in multi-component germanate cladding glass, assembled into optical fiber preforms, and then drawn down at 980°C to make optical fibers.

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Abstract

The invention provides a germanate glass cladding / semiconductor core composite optical fiber. In the present invention, multi-component germanate glass is used as the cladding material of the optical fiber, and Ge, InSb, GaSb, SnTe or GeTe semiconductor is used as the core material of the optical fiber to form a composite optical fiber with low loss characteristics in the 2-5 μm optical band. The pass rate is greater than 75%. The mid-infrared band has a wide range of applications in the fields of atmospheric monitoring, lidar, laser medical treatment and spectroscopy, and has become a research hotspot in recent years. When light is transmitted in an optical fiber, the transmission light field is mainly distributed in the fiber core, but there is also a part of the light field in the fiber cladding, so low-loss optical transmission requires that both the core and the cladding have high transmittance to the transmitted light . The invention greatly broadens the types of glass-clad semiconductor core composite material optical fibers, and at the same time can give full play to the performance of semiconductor materials in the mid-infrared, providing a basis for the application of composite material optical fibers in the mid-infrared.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, and in particular relates to a germanate glass cladding / semiconductor core composite material optical fiber. Background technique [0002] Optical fiber has important applications in traditional communication and has greatly improved human life in modern society. In 2009, Professor Kao, known as the "Father of Optical Fiber", won the Nobel Prize in Physics for proposing low-loss silica optical fiber to realize communication. However, with the development of society and the advancement of science and technology, higher requirements are put forward for optical fibers, such as: the detection of deep well gas and oil fields working in extreme environments, high-power laser systems with small nonlinearities, and highly nonlinear optical fibers To achieve optical signal processing, etc. Traditional silica fiber and rare-earth-doped glass fiber cannot meet these requirements due to their own de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02C03C13/04C03B37/025
CPCC03C3/253C03C3/321C03C13/003C03C13/043C03C13/048
Inventor 杨中民唐国武钱奇
Owner SOUTH CHINA UNIV OF TECH