强激光与粒子束2026，Vol.38Issue(11)：10-16,7.DOI:10.11884/HPLPB202638.260031
适用于强辐照环境的多模传能光纤性能退化研究
Performance degradation of multimode power-delivery optical fibers for harsh radiation environments
摘要
Abstract
[Background]Power-delivery optical fibers are used to route high-power laser beams in radiation environments.Under high total ionizing dose(TID),radiation-induced point defects increase attenuation at the operating wavelength and enhance heat generation,leading to thermal buildup and reduced operating margins.[Purpose]This study focuses on a pure-silica step-index multimode power-delivery fiber and aims to evaluate the effects of 60Co γ irradiation on its near-infrared transmission performance,the evolution of irradiation-induced point defects,and the temperature response under high-power operation,thereby elucidating the link between defect formation and macroscopic performance degradation.[Methods]RIA spectra were measured for fiber samples irradiated to multiple total doses.Under high-power transmission,the output power and temperature rise of an unirradiated fiber and a 100-kGy-irradiated fiber were compared at identical pump settings to quantify irradiation-induced macroscopic degradation.Electron paramagnetic resonance(EPR)and photoluminescence(PL)measurements were performed to microscopically identify the generation and transformation of irradiation-induced point defects.[Results]RIA increases overall with dose,and the additional attenuation at the 1 080 nm operating wavelength rises markedly.The transmitted output power decreases by 0.5%-4.3%after irradiation and is accompanied by a pronounced temperature increase,indicating that irradiation-induced excess loss is more readily converted into thermal load during operation.EPR shows a monotonic accumulation of E′ paramagnetic centers,while PL exhibits oxygen-vacancy-related emission peaks that increase and then decrease with dose.Taken together,the results show that at high doses,oxygen-vacancy-related luminescent centers undergo charge-state redistribution and conversion toward non-radiative centers,such as E′,leading to concomitant enhancement of excess loss and heat accumulation.[Conclusions]These findings provide mechanistic interpretation and experimental evidence to support performance-degradation assessment and radiation-hardening design of power-delivery fibers for nuclear decommissioning,spent-fuel processing,and other radiation-intensive applications.关键词
传能光纤/γ辐照/色心/辐照诱导衰减/电子顺磁共振Key words
power-delivery optical fiber/gamma irradiation/color center/radiation-induced attenuation/electron paramagnetic resonance分类
数理科学引用本文复制引用
苏航,郭刚,潘蓉,张利民,秦丰迪,张付强,隋丽,陈启明,殷倩..适用于强辐照环境的多模传能光纤性能退化研究[J].强激光与粒子束,2026,38(11):10-16,7.基金项目
中核集团研发平台稳定支持科研项目(CNNC-PTWZ-202517) （CNNC-PTWZ-202517）
