Chinese Academy of Sciences

Chunlei Yu

Lei Zhang

Meng Wang

Lili Hu

Xiaoqing Xu

Fan Wang

Yan Jiao

Danping Chen

Chongyun Shao

Fengguang Lou

Shikai Wang

Mengting Guo

A radiation-resistant laser optical fiber preform core rod at least includes one type of activated ion (Yb, Er) and one or more types of co-doped ion (Al, P, Ge, Ce, F), and —OD group of 16-118 ppm. Irradiation resistance of core rod glass can be effectively improved by sequentially performing pre-treatments, i.e. deuterium loading, pre-irradiation and thermal annealing on a preform core rod. Electron paramagnetic resonance test shows that, under the same radiation condition, the radiation induced color center concentration in a preform core rod treated by the method above is lower than in an untreated core rod by one or more orders of magnitude. The obtained core rod can be used for preparing a radiation-resistant rare earth-doped silica fiber, and has the advantages of high laser slope efficiency, low background loss, being able to be used stably in a vacuum environment for a long time, for example.

Radiation-resistant laser optical fiber preform core rod and preparation method therefor

A photodarkening-resistant ytterbium-doped quartz optical fiber and a method for prpearing such a fiber are provided. Glass of a photodarkening-resistant ytterbium-doped quartz optical fiber core rod includes at least YbO, AlO, PO, SiO. The proportions of YbO, AlO, and POin the entire substance are YbO: 0.05-0.3 mol %, AlO: 1-3 mol %, and PO: 1-5 mol %, respectively. In the preparation method for the photodarkening-resistant ytterbium-doped quartz optical fiber, a sol-gel method and an improved chemical vapor deposition method are combined. By using the molecular-level doping uniformity and the low preparation loss thereof respectively, ytterbium ions, aluminum ions and phosphorus ions are effectively doped in a quartz matrix, thereby effectively solving the problems in the optical fiber of high loss, photodarkening caused by cluster or the like, and a central refractive index dip.

Photodarkening-resistant ytterbium-doped quartz optical fiber and preparation method therefor

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Shanghai, China

Chunlei Yu