Dr. Mengmeng Tao Profile

Dr. Mengmeng Tao

at Northwest Institute of Nuclear Technology

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Proceedings Article | 12 March 2021 Paper

Investigation on irradiated characteristics of Tm-doped gain fiber

Yexi Qu, Jing Liu, Zhenxing He, Ting Yu, Kedi Xie, Tieqiang Song, Mengmeng Tao, Minbo Liu, Chunlei Yu, Xisheng Ye

Proceedings Volume 11763, 117639D (2021) https://doi.org/10.1117/12.2587691

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We demonstrated a stable fiber laser setup for real-time monitoring of Tm-doped gain fibers while being exposed to gamma-rays. The output power is about 10W, and the power stability of the system is ±0.25% based on the 12-hour continuous measurement. By using this laser setup and ⁶⁰Co gamma-ray irradiation source, the dose rate effect and total dose effect on the typical Tm-doped fiber specimens under water-cooling condition were experimentally studied. According to the obtained experimental results on five kinds of Tm-doped gain fiber from different R and D institutions and batches at home and abroad, the output power declines monotonously with the total irradiation dose increasing. During a dose rate range of 0.05 to 0.5 rad(Si)/s, the dose rate effects of Tm-doped gain fiber samples basically disappear, which means the differences of power degradation under different dose rate are almost invisible.

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