Infrared and Laser Engineering, Volume. 45, Issue 1, 118001(2016)
Influence of Gamma-ray radiation on optical fiber dispersion
The method based on energy deposition to analyze the influence of γ-ray radiation on fiber refractive index was proposed. The fiber dispersion variable which changes with the fiber V parameters and refractive index was analyzed and calculated. The γ radiation effects on fiber dispersion measurement experiments were accomplished, which demonstrates that the γ radiation impact on the presence of fiber dispersion. The fiber dispersion coefficient variation data with radiation dose were obtained. Experimental and theoretical results show that:(1) fiber dispersion coefficient increases with γ radiation dose, within the dose range of(0-500 Gy) fiber dispersion coefficient showed a gradual increase in the amount of saturated trends; (2) changes in the refractive index of the fiber lead to the additional material dispersion. The electron density increases caused by γ radiation is the major factor that results in changes in the refractive index; (3) the decrease of ultra-fast pulsed signal amplitude caused by radiation-induced loss is more significant than pulse broadening caused by radiation-induced dispersion. Both effects exist simultaneously. The pulsed signal distortion is the result of two joint action of especially for long distance optical fiber with nuclear radiation exposure.
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Liu Fuhua, Wang Ping, Feng Gang, Chen Shaowu, Wu Junjie, Liu Weiping, Xie Honggang. Influence of Gamma-ray radiation on optical fiber dispersion[J]. Infrared and Laser Engineering, 2016, 45(1): 118001
Category: 光学设计及仿真
Received: May. 5, 2015
Accepted: Jun. 3, 2015
Published Online: Apr. 5, 2016
The Author Email: Fuhua Liu (liufuhua@nint.ac.cn)