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A mid-infrared gain sulfide optical fiber and its preparation method

A gain fiber and sulfide technology, applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems of low luminous quantum efficiency, weak luminous intensity, and no luminescence, and achieve high luminous quantum efficiency, strong luminescence, and reduced relaxation rate. Effect

Active Publication Date: 2017-05-10
NANJING WAVELENGTH OPTO ELECTRONICS SCI & TECH CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a mid-infrared gain sulfide optical fiber and its preparation method to solve the problems of weak or no luminous intensity and low luminous quantum efficiency in the 2.5-5 μm mid-infrared band of the existing rare earth-doped sulfide optical fiber

Method used

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  • A mid-infrared gain sulfide optical fiber and its preparation method
  • A mid-infrared gain sulfide optical fiber and its preparation method
  • A mid-infrared gain sulfide optical fiber and its preparation method

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preparation example Construction

[0025] A method for preparing a mid-infrared gain sulfide optical fiber, the method is a rod-tube method, comprising the following steps:

[0026] (1) drawing the optical fiber core glass rod into a thin glass rod near the softening temperature;

[0027] (2) Drilling the optical fiber cladding glass rod along the central axis to obtain a glass sleeve, and polishing the inner wall of the glass sleeve;

[0028] (3) Insert the thin glass rod obtained in step (1) into the glass sleeve obtained in step (2), and draw it into an optical fiber at the softening temperature of the glass, namely 310°C-320°C, to obtain the mid-infrared gain optical fiber of the present invention.

[0029] The optical fiber core glass rod and the cladding glass rod are prepared by the vacuum melting and quenching method commonly used in preparing chalcogenide glass.

Embodiment 1

[0031] Example 1: 0.05% Dy 3+ doped Ga 0.08 Sb 0.32 As 0.05 S 0.55 / Ga 0.08 Sb 0.31 As 0.06 S 0.55 Optical fiber preparation

[0032] 0.05% Dy with a diameter of 10 mm was prepared by the vacuum melting-quenching method commonly used in the preparation of chalcogenide glasses 3+ doped Ga 0.08 Sb 0.32 As 0.05 S 0.55 Core glass rod and 10mm diameter Ga 0.08 Sb 0.31 As 0.06 S 0.55 Clad glass rod. Pull the core glass rod at 320°C into a thin glass rod with a diameter of 2.3 mm; drill the fiber cladding glass rod along the central axis to obtain a glass sleeve with an inner diameter of 2.3 mm, and polish the inner wall of the glass sleeve; Insert the obtained thin glass rod with a diameter of 2.3 mm into a glass sleeve, and draw it into an optical fiber with a diameter of 300 μm at 320 ° C to obtain the mid-infrared gain optical fiber of the present invention, as shown in figure 1 shown.

[0033] The test results show that the optical fiber has strong luminescenc...

Embodiment 2

[0034] Example 2: 1% Er 3+ doped Ga 0.06 Sb 0.30 As 0.04 S 0.60 / Ga 0.06 Sb 0.28 As 0.06 S 0.60 Optical fiber preparation

[0035] 1% Er with a diameter of 10 mm was prepared by the vacuum melting-quenching method commonly used in the preparation of chalcogenide glasses 3+ doped Ga 0.06 Sb 0.30 As 0.04 S 0.60 Core glass rod and 10mm diameter Ga0.06 Sb 0.28 As 0.06 S 0.60 Clad glass rod. Pull the core glass rod at 315°C into a thin glass rod with a diameter of 2.3 mm; drill the fiber cladding glass rod along the central axis to obtain a glass sleeve with an inner diameter of 2.3 mm, and polish the inner wall of the glass sleeve; The obtained thin glass rod with a diameter of 2.3 mm was inserted into a glass sleeve, and drawn at 315° C. to form an optical fiber with a diameter of 300 μm to obtain the mid-infrared gain optical fiber of the present invention.

[0036] The test results show that the optical fiber has a strong luminescence at 2.77μm, such as image...

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Abstract

The invention relates to medium-infrared gain sulfide optical fibers and a preparation method thereof, and belongs to laser gain optical fibers and a preparation method thereof. According to the present invention, the optical fiber core material is a rare earth ion doped Ga-Sb-As-S glass, the optical fiber cladding material is a Ga-Sb-As-S glass, the refractive index of the optical fiber core glass is greater than the refractive index of the cladding glad, the chemical formula of the Ga-Sb-As-S glass is Ga(1-x-y-z)SbxAsySz, x is 0.26-0.32, y is 0.02-0.06, z is 0.55-0.65, the rare earth ion is one selected from Dy<3+>, Er<3+> and Tm<3+>, and the molar concentration of the doped rare earth ions is 0.05-1%; the optical fibers are prepared through a rod tube method, wherein the fiber core glass and the cladding glass are respectively prepared into the thin rod and the bushing, the fiber core glass thin rod is inserted into the cladding glass bushing, and drawing is performed to obtain the optical fibers having the final size; and the gain sulfide optical fibers have strong luminescence at a wavelength of 2.5-5 [mu]m, the luminescence quantum efficiency is greater than 70%, and the gain sulfide optical fibers can be adopted as the core gain medium of the low-cost and compact medium-infrared optical fiber laser.

Description

technical field [0001] The invention relates to a laser gain optical fiber and a preparation method, in particular to a mid-infrared gain sulfide optical fiber and a preparation method. Background technique [0002] 2.5-5 μm mid-infrared lasers have important applications in the fields of infrared countermeasures, atmospheric sensing, environmental monitoring, and biomedicine, and have received extensive attention in the past few decades. At present, optical parametric oscillator (OPO) and quantum cascade laser (QCL) are widely used mid-infrared laser sources. However, the OPO system is complex, QCL has laser stability problems, and both are relatively expensive, these shortcomings limit its practical application. Solid-state lasers based on active ion-doped gain media usually have the advantages of high integration, high efficiency and low cost, and have attracted much attention in recent years. Currently, one of the main problems facing mid-infrared solid-state lasers is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C13/04C03B37/025
CPCC03C3/321C03C4/10C03C4/12C03C13/043
Inventor 杨安平杨志勇张鸣杰张斌翟程程祁思胜唐定远
Owner NANJING WAVELENGTH OPTO ELECTRONICS SCI & TECH CO LTD
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