	US 12,001,052 B2
	Radiation-resistant laser optical fiber preform core rod and preparation method therefor
Chongyun Shao, Shanghai (CN); Lili Hu, Shanghai (CN); Chunlei Yu, Shanghai (CN); Meng Wang, Shanghai (CN); Yan Jiao, Shanghai (CN); Lei Zhang, Shanghai (CN); Shikai Wang, Shanghai (CN); and Xiaoqing Xu, Shanghai (CN)
Assigned to SHANGHAI INSTITUTE OF OPTICS AND FINE MECHANICS, CHINESE ACADEMY OF SCIENCES, Shanghai (CN)
Appl. No. 17/761,075
Filed by Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai (CN)
PCT Filed Jul. 1, 2020, PCT No. PCT/CN2020/099708 § 371(c)(1), (2) Date Mar. 16, 2022, PCT Pub. No. WO2021/051954, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 201910872955.9 (CN), filed on Sep. 16, 2019.
Prior Publication US 2022/0342147 A1, Oct. 27, 2022
Int. Cl. G02B 6/02 (2006.01); C03C 25/1065 (2018.01); G02B 6/036 (2006.01)

CPC G02B 6/02395 (2013.01) [C03C 25/1065 (2013.01); G02B 6/036 (2013.01); C03B 2201/34 (2013.01)]

11 Claims

1. A radiation-resistant laser optical fiber preform core rod, wherein the preform core rod is Yb—Al—P—Ce—F co-doped silica glass, and a composition range of the preform core rod is: Yb₂O₃: 0.1˜0.2 mol %, Al₂O₃: 1.2˜1.9 mol %, P₂O₅: 2.6˜2.7 mol %, Ce₂O₃: 0.05˜0.07 mol %, F: 0.15˜1.1% mol %, SiO₂: 94.03-95.9 mol %; the preform core rod also contains —OD group, and a mass ratio of the —OD group in whole substance is 118˜150 ppm; wherein the —OD group is introduced by sequentially carrying out gas loading-pre-irradiation-thermal annealing treatments on the preform core rod;

wherein the thermal annealing treatment diffuses deuterium gas molecules left over from chemical reaction from the preform core rod; and

radiation induced color center concentration of powder sample of the preform core rod after being irradiated by 1700 Gy gamma rays is 2.1*10¹⁴spins/mm³-120*10¹⁴spins/mm³.