Fiber lasers are increasingly employed in radiative environments,such as outer space and nuclear facilities.However,their performance is significantly compromised under irradiation due to the accumulation of defects i...Fiber lasers are increasingly employed in radiative environments,such as outer space and nuclear facilities.However,their performance is significantly compromised under irradiation due to the accumulation of defects in fiber components.Despite various radiation-hardening strategies,including optimized fiber designs and posttreatment techniques,these approaches have been unable to fully mitigate performance degradation.In this study,we demonstrate near 100%power recovery in a 150 W fiber laser exposed to radiation,achieved through an insitu photobleaching technique utilizing low-power blue light.This all-fiber photobleaching strategy not only restores laser performance but also provides a robust,compact,and scalable solution for developing highperformance radiation-resistant fiber lasers.The proposed approach holds significant potential for advancing laser applications in challenging radiative environments,such as space exploration,nuclear power plants,and medical radiotherapy.展开更多
基金National Natural Science Foundation of China(12004432)Science and Technology Innovation Program of Hunan Province(2021RC3083)+2 种基金Training Program for Excellent Young Innovators of Changsha(kq2305038,kq2206002)High-level Talents Programs of National University of Defense TechnologyPostgraduate Scientific Research Innovation Project of Hunan Province(CX20240119)。
文摘Fiber lasers are increasingly employed in radiative environments,such as outer space and nuclear facilities.However,their performance is significantly compromised under irradiation due to the accumulation of defects in fiber components.Despite various radiation-hardening strategies,including optimized fiber designs and posttreatment techniques,these approaches have been unable to fully mitigate performance degradation.In this study,we demonstrate near 100%power recovery in a 150 W fiber laser exposed to radiation,achieved through an insitu photobleaching technique utilizing low-power blue light.This all-fiber photobleaching strategy not only restores laser performance but also provides a robust,compact,and scalable solution for developing highperformance radiation-resistant fiber lasers.The proposed approach holds significant potential for advancing laser applications in challenging radiative environments,such as space exploration,nuclear power plants,and medical radiotherapy.
