A kind of anti-photodarkening ytterbium-doped silica fiber and its preparation method

A technology for drawing silica optical fiber and optical fiber, which is applied in the field of ytterbium-doped silica optical fiber and its preparation, which can solve the problems of difficult uniform doping, large fluctuation of refractive index, and no report on the anti-photodarkening performance of optical fiber.

Active Publication Date: 2021-03-02
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

In this method, aluminum ytterbium is soaked in solution, while phosphorus is post-doped, so it is difficult to achieve uniform doping. It can be seen from the reported refractive index distribution diagram that the refractive index fluctuates greatly
And there is no report on the anti-photodarkening performance of the optical fiber

Method used

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  • A kind of anti-photodarkening ytterbium-doped silica fiber and its preparation method
  • A kind of anti-photodarkening ytterbium-doped silica fiber and its preparation method
  • A kind of anti-photodarkening ytterbium-doped silica fiber and its preparation method

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Embodiment Construction

[0034] Aiming at the deficiencies of the existing technology, the present invention discloses an optical fiber that suppresses the photodarkening of ytterbium-doped silica optical fiber and a preparation method thereof. Combined with the advantages of molecular-level doping uniformity and low loss preparation, ytterbium ions and aluminum ions and phosphorus ions are effectively doped in the quartz matrix, which effectively solves the problem of high optical fiber loss and photodarkening caused by clusters. And the center of refraction depression problem. The indicators of the present invention fully meet the requirements for the use of commercial optical fibers: the power can be reduced by 5% for 500 hours under 1000W pumping conditions, and the loss is as low as 15dB / km. When the doping concentration of ytterbium ions reaches 0.3mol%, the laser The efficiency is greater than 80%, and is suitable for large-scale industrial production.

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Abstract

The invention relates to an anti-photodarkening ytterbium-doped silica fiber and a preparation method thereof. Specifically, the present invention provides an anti-photodarkening ytterbium-doped silica optical fiber, the glass of the optical fiber core rod at least includes Yb 2 o 3 、Al 2 o 3 ,P 2 o 5 , SiO 2 , where Yb 2 o 3 、Al 2 o 3 ,P 2 o 5 The proportions in the whole substance are: Yb 2 o 3 : 0.05~0.3mol%, Al 2 o 3 : 1~3mol%, P 2 o 5 : 1 to 5 mol%. The invention also provides a preparation method of an anti-photodarkening ytterbium-doped silica fiber. The present invention combines the sol-gel method and the improved chemical vapor deposition method, respectively utilizes its molecular-level doping uniformity and low-loss preparation advantages, effectively doping ytterbium ions, aluminum ions and phosphorus ions into the quartz matrix, effectively solving the problem of It solves the problems of high fiber loss, photodarkening due to clusters and other reasons, and the depression of the refractive index center.

Description

technical field [0001] The invention relates to the field of optical fibers, in particular to an anti-photodarkening ytterbium-doped silica optical fiber and a preparation method thereof. Background technique [0002] Ytterbium-doped silica fiber is the core component of 1μm fiber laser. With the rapid development of energy optoelectronic technologies such as semiconductor laser pumping and laser coupling, the power of ytterbium-doped fiber lasers has also developed from the initial watt level to the 10,000 watt level. However, with the increase of laser power, the output power of Yb-doped silica fiber decreases with the increase of running time, which is called photodarkening phenomenon. Photodarkening greatly restricts the lifetime and stability of high-power Ytterbium-doped fiber lasers. [0003] The main reasons for the photodarkening phenomenon of ytterbium-doped silica fiber are as follows. The first is the color center. Regarding the cause of the color center, S.Yo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/018C03B37/025C03C13/04
CPCC03B37/018C03B37/025C03C13/046C03B37/01861C03B37/01853C03B37/01869C03B37/01838C03B2201/28C03B2201/36C03B2203/04H01S3/067C03C3/06C03C2201/3488C03C2201/32C03C2201/28C03C2203/44C03C25/1068H01S3/09415H01S3/1608H01S3/176H01S3/1693H01S3/1691H01S3/1698C03B2203/32G02B6/036
Inventor 楼风光胡丽丽于春雷王孟张磊许晓青陈丹平
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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