摘要
为提高某光学干涉测量系统的耐辐射能力,开展耐辐射光纤选型实验。以剂量率为0.5 Gy·s^(-1)的稳态γ射线和剂量率为5.0×10^(9) Gy·s^(-1)、脉冲宽度约20 ns的瞬态强γ射线为辐照源,获得掺锗、掺氟耐辐射单模光纤和常规G.652光纤在工作波长1550 nm、注入光功率40 mW工况下的辐射感生损耗,结果表明,实验获得的在线辐射感生损耗数据真实可靠;在稳态γ射线作用下,掺锗和掺氟耐辐射光纤的性能差异不大,辐射感生损耗小于17 dB·km^(-1),随着辐射时间的增加,辐射损耗呈现饱和,耐辐射光纤的性能均优于常规单模G.652通信光纤;在瞬态强γ射线作用下,两个不同型号掺氟光纤的性能最优,辐射感生损耗峰值分别为471.5 dB·km^(-1)和608.6 dB·km^(-1),恢复通信时长约μs量级。掺锗光纤的瞬态辐照性能最差,辐射感生损耗峰值为2691.3 dB·km^(-1),在μs时间尺度维持感生损耗饱和状态。
Objective With the continuous development of optical fiber production technology,optical fiber sensing technology has been widely used in radiation environments such as outer space and nuclear power plants.However,under the action of radiation sources such as X-ray,γ-ray,electron and neutron,optical fiber will produce radiation induced loss especially in the intense pulse radiation field,the transient induced loss of optical fiber can reach thousands of dB,which has been widely concerned.To carry out the experimental study on the mechanical effect of radiation beam acting on materials,a set of optical fiber displacement interferometry system was established to obtain the dynamic mechanical response parameters of various materials under irradiation.In order to improve the radiation resistance of the interferometry system,it is necessary to carry out the examination experiments of various types of radiation-resistant quartz optical fibers and select the optical fibers with excellent radiation resistance.Methods Based on the established optical fiber displacement interferometry system,it is necessary to carry out irradiation experiments.Under the conditions of working wavelength of 1550 nm and injected optical power of 40 mW,the online induced loss values of various radiation-resistant single-mode fibers under steady and transient irradiation are obtained,and there is no relevant data at home and abroad at present.The radiation sources selected in the experiment include 60Co radiation source and"Qiangguang-Ⅰ"γpulse radiation source,respectively with radiation dose rates of 0.5 Gy·s^(-1)and 5.0×109 Gy·s^(-1),where the pulse width of the pulse radiation source is about 20 ns.The fiber samples selected in the experiment include Ge-doped radiation-resistant single-mode quartz fiber,F-doped radiation-resistant single-mode quartz fiber and G.652 ordinary single-mode fiber.All optical fiber samples were arranged in the radiation window,and the radiation induced loss of optical fiber in steady and transient irradiati
作者
王昭
杨军
张敏
刘文祥
史国凯
惠海龙
WANG Zhao;YANG Jun;ZHANG Min;LIU Wenxiang;SHI Guokai;HUI Hailong(National Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi’an 710024,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2024年第8期178-185,共8页
Infrared and Laser Engineering
关键词
辐射感生损耗
石英光纤
稳态辐照
瞬态辐照
radiation-induced loss
quartz optical fiber
steady-state irradiation
transient irradiation
