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

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...

AI Technical Summary

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

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