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应用科学学报 ›› 2022, Vol. 40 ›› Issue (2): 204-211.doi: 10.3969/j.issn.0255-8297.2022.02.003

• 通信工程 • 上一篇    

辐照对Bi/Er/La共掺有源光纤磁光特性的影响

叶乐1,2, 文建湘1,2, 曾嘉伟1,2, 董艳华1,2, 王廷云1,2   

  1. 1. 上海大学 特种光纤与光接入网重点实验室, 上海 200444;
    2. 上海大学 特种光纤与先进通信国际合作联合实验室, 上海 200444
  • 收稿日期:2021-04-21 发布日期:2022-04-01
  • 通信作者: 文建湘，教授，博导，研究方向为特种光纤设计与制造、光纤激光器、光纤传感。E-mail：wenjx@shu.edu.cn E-mail:wenjx@shu.edu.cn
  • 基金资助:
    国家自然科学基金（No. 61975113， No. 61935002， No. 61675125， No. 61635006）；国家重点研发计划（No. 2020YFB1805800， No. 2018YFB1801800）资助

Influence of Irradiation on Magneto-Optical Properties of Bi/Er/La Co-doped Active Silica Fiber

YE Le1,2, WEN Jianxiang1,2, ZENG Jiawei1,2, DONG Yanhua1,2, WANG Tingyun1,2   

  1. 1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China;
    2. Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai 200444, China
  • Received:2021-04-21 Published:2022-04-01

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摘要： 针对标准单模石英光纤磁光特性弱的特点，利用改进化学气相沉积（modifiedchemical vapor deposition，MCVD）法结合原子层沉积（atomic layer deposition，ALD）技术制备了Bi/Er/La共掺有源光纤，并且用伽马射线辐照对该光纤进一步处理；搭建了光纤的费尔德常数测试系统，研究辐照前后Bi/Er/La共掺有源光纤的磁光特性。实验结果表明：在波长为1 310 nm处，Bi/Er/La共掺有源光纤的费尔德常数（1.02 rad/（T · m））比单模光纤（0.76 rad/（T · m））高约36.2%。经伽马射线辐照后，Bi/Er/La共掺有源光纤的费尔德常数随着辐照剂量的增加而增大，经3.0 kGy剂量处理后，其费尔德常数增加了54.90%，而单模光纤的费尔德常数仅增加了26.3%，且在1.0 kGy辐照处理已达到饱和。

关键词: Bi/Er/La共掺有源光纤, 磁光特性, 费尔德常数, 辐照

Abstract: To improve the weak magneto-optical properties of standard single-mode fibers, in this paper, we fabricated a Bi/Er/La co-doped active silica fiber by using modified chemical vapor deposition (MCVD) method in combination with atomic layer deposition (ALD) technology. Furthermore, we processed the fiber with gamma-ray irradiation. A Verdet constant measurement system for fibers was built to study the magneto-optical properties of Bi/Er/La co-doped active silica fiber before and after irradiation. Experimental results show that the Verdet constant of Bi/Er/La co-doped active silica fiber is 1.02 rad/(T · m)at 1 310 nm, which is 36.2% higher than that of standard single-mode fiber. It is also shown that the processing of gamma-ray irradiation can improve the magneto-optical property of the fiber, and the Verdet constant of Bi/Er/La co-doped active silica fiber increases with the increase of irradiation dose. Especially under the irradiation dose of 3.0 kGy, the Verdet constant increases by 54.90%, whereas that of standard single-mode fibers increases only by 26.3% and gets saturation at the irradiation dose of 1.0 kGy.

Key words: Bi/Er/La co-doped active silica fiber, magneto-optical property, Verdet constant, irradiation

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