Anti-photodarkening ytterbium-doped quartz optical fiber and preparation method thereof

Abstract

The invention relates to an anti-photodarkening ytterbium-doped quartz optical fiber and a preparation method thereof. According to the anti-photodarkening ytterbium-doped quartz optical fiber, glassof an optical fiber core rod is at least prepared from Yb2O3, Al2O3, P2O5 and SiO2, wherein the ratio of the Yb2O3 in the whole substance is 0.05-0.3 mol%, the ratio of the Al2O3 in the whole substance is 1-3 mol%, and the ratio of the P2O5 in the whole substance is 1-5 mol%. According to the preparation method for the anti-photodarkening ytterbium-doped quartz optical fiber, a sol-gel method andan improved chemical vapor deposition method are combined, the molecular-level doping uniformity and the low-loss preparation advantages are utilized, ytterbium ions, aluminum ions and phosphorus ionsare effectively doped in a quartz matrix, and therefore the problem of high optical fiber loss, photodarkening caused by the reasons such as cluster and refractive index center depression can be effectively solved.

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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