脉冲<em>γ</em>射线对光纤的辐射感生损耗

刘福华; 安毓英; 王平; 陈绍武; 谢红刚; 刘卫平; 邵碧波

脉冲γ射线对光纤的辐射感生损耗

1.
西安电子科技大学技术物理学院,陕西西安 710071;
2.
西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安 710024

基金项目:

国家自然科学基金（61107041）

详细信息

作者简介:
刘福华（1967-），男，研究员，主要从事激光测量和光纤应用技术方面的研究。Email：liufuhua_2000@sohu.com

中图分类号: TN253;O436.2

Radiation-induced loss of pulsed γ-ray on optical fibers

1.
School of Technical Physics,Xidian University,Xi'an 710071,China;
2.
State Key Laboratory of Laser Interaction with Matter,Northwest Institute of Nuclear Technology,Xi'an 710024,China

摘要: 研究了光纤受射线辐照响应机制，计算了光纤对射线吸收率、效应截面、Compton电子的能通量及角度分布；提出了瞬态辐射感生损耗的测量方法，采用波长分别为405、660、850、1 310、1 550 nm的模拟宽带光纤传输系统，设计了瞬态辐射感生损耗的实验测量系统。在平均光子能量0.3 MeV、剂量率2.03107 Gy/s和平均光子能量1.0 MeV、剂量率5.32109 Gy/s的两种脉冲射线辐照条件下，获得了4种光纤瞬态辐射感生损耗与剂量的关系、永久性感生损耗的谱分布和折射率变化结果：（1）脉冲射线对光纤的瞬态辐射感生损耗随探测波长在近红外到可见光范围内的减小而增大；（2）在相同辐照条件下，多模光纤的瞬态辐射感生损耗稍大于单模光纤；（3）辐射致光纤折射率降低；（4）在一定剂量范围内，多模光纤瞬态辐射感生损耗和剂量呈近似线性关系。研究表明，射线导致光纤基质原子产生新的色心和光纤折射率降低，色心对传输光子的共振吸收导致光纤吸收损耗增加，折射率降低导致光纤波导损耗增加，感生损耗是两种机制共同作用的结果。
- 瞬态辐射感生损耗 /
- 脉冲γ射线 /
- 光纤 /
- 色心 /
- 折射率
Abstract: General mechanisms for effects of -ray radiation on optical fibers were studied. Absorption coefficient of -ray, cross sections of different effects, energy and flux and angle distributions of resulting Compton recoil electrons in optical fibers were calculated. An experimental method for transient radiation-induced loss measurement was presented. In order to measure transient radiation loss induced by pulsed -ray in optical fibers, it was developed that an experimental measurement system which applied analog broad bandwidth optical fiber links with five different wavelength lasers such as 405, 660, 850, 1 310 and 1 550 nm. Two different kinds of pulsed -ray devices with average photon energy of 0.3 MeV, dose rate of 2.03107 Gy/s and average photon energy of 1.0 MeV, dose rate of 5.32109 Gy/s were used to irradiate four types of optical fibers in experiments. The transient radiation-induced loss and its relationship with total doses of exposure were measured, and also the permanent radiation-induced losses with light spectrum, changes of refractive index. The experimental results show that: (1) The transient radiation-induced loss will increase as the detecting laser wavelength shifts from near-infrared to visible regions of optical spectrum.(2) Under the same experimental condition, the transient radiation-induced loss of multimode fibers is slightly larger than single-mode fibers.(3) The radiation of -ray will slightly decrease the refractive index of optical fibers.(4) Within a certain dose range transient radiation-induced loss in multi-mode fiber displays a nearly linear dependence upon total dose. The conclusion can be deduced that the generation of new color centers in fiber materials due to Compton electrons will increase the absorption loss and the changes of refractive index will lead to additional waveguide loss in optical fibers. Both radiation-induced loss mechanisms exist simultaneously; therefore, radiation-induced loss is the result of joint action of the two.
- transient radiation-induced loss /
- pulsed γ-ray /
- optical fiber /
- color center /
- refractive index

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脉冲γ射线对光纤的辐射感生损耗

作者简介:
刘福华（1967-），男，研究员，主要从事激光测量和光纤应用技术方面的研究。Email：liufuhua_2000@sohu.com

Radiation-induced loss of pulsed γ-ray on optical fibers

计量

脉冲γ射线对光纤的辐射感生损耗

1. 西安电子科技大学技术物理学院,陕西西安 710071;

2. 西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安 710024

作者简介:
刘福华（1967-），男，研究员，主要从事激光测量和光纤应用技术方面的研究。Email：liufuhua_2000@sohu.com

English Abstract

Radiation-induced loss of pulsed γ-ray on optical fibers

1. School of Technical Physics,Xidian University,Xi'an 710071,China;

2. State Key Laboratory of Laser Interaction with Matter,Northwest Institute of Nuclear Technology,Xi'an 710024,China

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脉冲γ射线对光纤的辐射感生损耗

作者简介: 刘福华（1967-），男，研究员，主要从事激光测量和光纤应用技术方面的研究。Email：liufuhua_2000@sohu.com

Radiation-induced loss of pulsed γ-ray on optical fibers

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脉冲γ射线对光纤的辐射感生损耗

1. 西安电子科技大学 技术物理学院,陕西 西安 710071; 2. 西北核技术研究所 激光与物质相互作用国家重点实验室,陕西 西安 710024

作者简介: 刘福华（1967-），男，研究员，主要从事激光测量和光纤应用技术方面的研究。Email：liufuhua_2000@sohu.com

English Abstract

Radiation-induced loss of pulsed γ-ray on optical fibers

1. School of Technical Physics,Xidian University,Xi'an 710071,China; 2. State Key Laboratory of Laser Interaction with Matter,Northwest Institute of Nuclear Technology,Xi'an 710024,China

全文HTML

目录

作者简介:
刘福华（1967-），男，研究员，主要从事激光测量和光纤应用技术方面的研究。Email：liufuhua_2000@sohu.com

1. 西安电子科技大学技术物理学院,陕西西安 710071;

2. 西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安 710024

作者简介:
刘福华（1967-），男，研究员，主要从事激光测量和光纤应用技术方面的研究。Email：liufuhua_2000@sohu.com

1. School of Technical Physics,Xidian University,Xi'an 710071,China;

2. State Key Laboratory of Laser Interaction with Matter,Northwest Institute of Nuclear Technology,Xi'an 710024,China