Radiation-Induced Mode Instability Threshold Degradation and Self-Recovery in High-Power Fiber Amplifiers Under γ-radiation

Sun Shihao; Wang Xuefeng; Chen Jianhua; Wu Jiazheng; Yu Miao; Li Siyuan; Wang Junlong

doi:10.11884/HPLPB202638.250422

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Article Navigation > High Power Laser and Particle Beams > 2026 > Accepted Manuscript

Sun Shihao, Wang Xuefeng, Chen Jianhua, et al. Radiation-Induced Mode Instability Threshold Degradation and Self-Recovery in High-Power Fiber Amplifiers Under γ-radiation[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250422

Citation:

Sun Shihao, Wang Xuefeng, Chen Jianhua, et al. Radiation-Induced Mode Instability Threshold Degradation and Self-Recovery in High-Power Fiber Amplifiers Under γ-radiation[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250422

Citation:

Sun Shihao, Wang Xuefeng, Chen Jianhua, et al. Radiation-Induced Mode Instability Threshold Degradation and Self-Recovery in High-Power Fiber Amplifiers Under γ-radiation[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250422

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Radiation-Induced Mode Instability Threshold Degradation and Self-Recovery in High-Power Fiber Amplifiers Under γ-radiation

doi: 10.11884/HPLPB202638.250422

Beijing Institute of Aerospace Control Devices, Beijing 10094, China

Received Date: 2025-11-26
Accepted Date: 2026-01-12
Rev Recd Date: 2026-02-22

Available Online: 2026-03-27

Abstract

Abstract

Background
The performance of high-power fiber amplifiers operating in radiation environments is severely degraded by the radiation-induced mode instability (R-TMI) effect. A deep understanding of its degradation and self-recovery mechanism is therefore crucial for practical applications.
Purpose
This study aims to investigate the influence of γ-ray radiation on the mode instability threshold of a high-power fiber amplifier and to elucidate the underlying self-recovery mechanism of the R-TMI effect.
Methods
Experimental investigations were conducted on a fiber amplifier subjected to γ-ray radiation. The output power characteristics and the frequency-domain signals of the output laser were monitored and analyzed under varying pump current conditions to study the dynamics of the R-TMI effect.
Results
The experimental results reveal that the onset of the R-TMI effect induces significant fluctuations in the output power. As the pump current is gradually increased, the output power consistently evolves through four distinct stages over time: rapid decline, slow decline, slow rise, and finally metastable state. At each specific pump current level, the power fluctuation range, defined as the difference between the maximum and minimum output power, remains stable within 29.7% to 39.1% of the pre-radiation output power. Furthermore, frequency-domain analysis of the output laser signal provided evidence supporting the existence of a self-recovery effect in R-TMI.
Conclusions
The study characterizes the variation of the TMI threshold and the subsequent power dynamics under radiation. The self-recovery behavior offers valuable theoretical and experimental references for the design and mitigation of R-TMI effects in high-power fiber lasers intended for use in radiation environments.
- fiber laser amplifier,
- γ radiation,
- radiation-induced mode instability,
- self-recovery mechanism

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References(29)

References

[1]	Girard S, Kuhnhenn J, Gusarov A, et al. Radiation effects on silica-based optical fibers: recent advances and future challenges[J]. IEEE Transactions on Nuclear Science, 2013, 60(3): 2015-2036. doi: 10.1109/TNS.2012.2235464
[2]	Girard S, Ouerdane Y, Bouazaoui M, et al. Transient radiation-induced effects on solid core microstructured optical fibers[J]. Optics Express, 2011, 19(22): 21760-21767. doi: 10.1364/OE.19.021760
[3]	Jetschke S, Unger S, Leich M, et al. Photodarkening kinetics as a function of Yb concentration and the role of Al codoping[J]. Applied Optics, 2012, 51(32): 7758-7764. doi: 10.1364/AO.51.007758
[4]	Limpert J, Roser F, Klingebiel S, et al. The rising power of fiber lasers and amplifiers[J]. IEEE Journal of Selected Topics in Quantum Electronics, 2007, 13(3): 537-545. doi: 10.1109/JSTQE.2007.897182
[5]	王巍. 光纤陀螺在宇航领域中的应用及发展趋势[J]. 导航与控制, 2020, 19(4/5): 18-28 doi: 10.3969/j.issn.1674-5558.2020.h4.003 Wang Wei. Application and development tendency of fiber optic gyroscope in space[J]. Navigation and Control, 2020, 19(4/5): 18-28 doi: 10.3969/j.issn.1674-5558.2020.h4.003
[6]	冯忠伟, 荣刚, 姜爽, 等. 空间光纤传感测量技术应用研究[J]. 宇航计测技术, 2017, 37(2): 5-9 Feng Zhongwei, Rong Gang, Jiang Shuang, et al. Research on fiber sensing measurement for spacecraft[J]. Journal of Astronautic Metrology and Measurement, 2017, 37(2): 5-9
[7]	郑永超, 赵思思, 李同, 等. 激光空间碎片移除技术发展与展望[J]. 空间碎片研究, 2020, 20(4): 1-10 Zheng Yongchao, Zhao Sisi, Li Tong, et al. Current status and development of laser active debris removal technology[J]. Space Debris Research, 2020, 20(4): 1-10
[8]	李奋飞, 周晓燕, 张魁宝, 等. 伽马辐照对掺镱光纤材料特性影响的研究[J]. 强激光与粒子束, 2020, 32: 081003 doi: 10.11884/HPLPB202032.200059 Li Fenfei, Zhou Xiaoyan, Zhang Kuibao, et al. Effect of gamma irradiation on characteristics of Yb-doped fiber materials[J]. High Power Laser and Particle Beams, 2020, 32: 081003 doi: 10.11884/HPLPB202032.200059
[9]	郑也, 马梓洋, 朱嘉婧, 等. 高功率掺镱光纤激光器的辐照影响分析及研究进展[J]. 强激光与粒子束, 2022, 34: 041003 Zheng Ye, Ma Ziyang, Zhu Jiajing, et al. Influence of space radiation on properties of high power Yb-doped fiber lasers and their recent progress[J]. High Power Laser and Particle Beams, 2022, 34: 041003
[10]	Cao Jianqiu, Chen Maoni, Huang Zhihe, et al. Requirements on double-cladding Yb-doped fiber for power scaling of diffraction-limited fiber amplifiers[J]. Optics Express, 2024, 32(7): 12892-12910. doi: 10.1364/OE.516692
[11]	Chen Yisha, Xu Haozhen, Xing Yinbing, et al. Impact of gamma-ray radiation-induced photodarkening on mode instability degradation of an ytterbium-doped fiber amplifier[J]. Optics Express, 2018, 26(16): 20430-20441. doi: 10.1364/OE.26.020430
[12]	Cao Ruiting, Lin Xianfeng, Chen Yisha, et al. 532 nm pump induced photo-darkening inhibition and photo-bleaching in high power Yb-doped fiber amplifiers[J]. Optics Express, 2019, 27(19): 26523-26531. doi: 10.1364/OE.27.026523
[13]	谌鸿伟, 陶蒙蒙, 赵海川, 等. γ射线作用下光纤激光器的功率特性及热效应分析[J]. 中国激光, 2020, 47: 0401004 doi: 10.3788/CJL202047.0401004 Chen Hongwei, Tao Mengmeng, Zhao Haichuan, et al. Power characteristics and thermal effects of the gamma-ray radiated fiber lasers[J]. Chinese Journal of Lasers, 2020, 47: 0401004 doi: 10.3788/CJL202047.0401004
[14]	谌鸿伟, 陶蒙蒙, 赵海川, 等. γ射线辐照增益光纤影响激光器功率特性实验[J]. 中国激光, 2019, 46: 1201005 doi: 10.3788/CJL201946.1201005 Chen Hongwei, Tao Mengmeng, Zhao Haichuan, et al. Experimental investigations on laser power characteristics influenced by gamma-ray irradiated gain fiber[J]. Chinese Journal of Lasers, 2019, 46: 1201005 doi: 10.3788/CJL201946.1201005
[15]	Tao Mengmeng, Chen Hongwei, Feng Guobin, et al. Thermal modeling of high-power Yb-doped fiber lasers with irradiated active fibers[J]. Optics Express, 2020, 28(7): 10104-10123. doi: 10.1364/OE.384980
[16]	曹涧秋, 周尚德, 刘鹏飞, 等. 辐照效应对于掺镱光纤放大器模式不稳定阈值影响的理论研究[J]. 物理学报, 2024, 73: 204202 Cao Jianqiu, Zhou Shangde, Liu Pengfei, et al. Theoretical study on radiation effect on threshold of transverse mode instability of Yb-doped fiber amplifiers[J]. Acta Physica Sinica, 2024, 73: 204202
[17]	Ballato J, Hawkins T W, Dragic P D, et al. Material approaches to thermal management in advanced fiber lasers and amplifiers[C]//Proceedings of SPIE 12437, Photonic Heat Engines: Science and Applications V. 2023: 1243705.
[18]	Kholaif S, Bahri M, Klenke A, et al. The impact of core size scaling on the transverse mode instability threshold in fiber laser amplifiers[C]//Proceedings of SPIE 12400, Fiber Lasers XX: Technology and Systems. 2023: 124000W.
[19]	Dong Liang, Zervas M V. Transverse mode instability in fiber laser oscillators[J]. Optics Express, 2023, 31(15): 24964-24975. doi: 10.1364/OE.495921
[20]	罗文芸. 石英光纤材料辐射诱导缺陷的形成机理研究[D]. 上海: 上海大学, 2013 Luo Wenyun. Formation mechanism of radiation induced defects in silica optical fiber material[D]. Shanghai: Shanghai University, 2013
[21]	陈进湛. 掺镱石英光纤暗化动力学特性研究[D]. 成都: 电子科技大学, 2020 Chen Jinzhan. Research on darkening kinetics characteristic of Yb-doped silica fiber[D]. Chengdu: University of Electronic Science and Technology of China, 2020
[22]	邵冲云, 于春雷, 胡丽丽. 面向空间应用耐辐照有源光纤研究进展[J]. 中国激光, 2020, 47: 0500014 doi: 10.3788/CJL202047.0500014 Shao Chongyun, Yu Chunlei, Hu Lili. Radiation-resistant active fibers for space applications[J]. Chinese Journal of Lasers, 2020, 47: 0500014 doi: 10.3788/CJL202047.0500014
[23]	Griscom D L. A minireview of the natures of radiation-induced point defects in pure and doped silica glasses and their visible/near-IR absorption bands, with emphasis on self-trapped holes and how they can be controlled[J]. Physics Research International, 2013, 2013: 379041. doi: 10.1155/2013/379041
[24]	Lezius M, Predehl K, Stower W, et al. Radiation induced absorption in rare earth doped optical fibers[J]. IEEE Transactions on Nuclear Science, 2012, 59(2): 425-433. doi: 10.1109/TNS.2011.2178862
[25]	Fox B P, Simmons-Potter K, Kliner D A V, et al. Effect of low-earth orbit space on radiation-induced absorption in rare-earth-doped optical fibers[J]. Journal of Non-Crystalline Solids, 2013, 378: 79-88. doi: 10.1016/j.jnoncrysol.2013.06.009
[26]	Zervas M N. Transverse-modal-instability gain in high power fiber amplifiers: effect of the perturbation relative phase[J]. APL Photonics, 2019, 4: 022802. doi: 10.1063/1.5050523
[27]	Arai T, Ichii K, Tanigawa S, et al. Gamma-radiation-induced photodarkening in ytterbium-doped silica glasses[C]//Proceedings of SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications. 2011: 79140K.
[28]	Liu Shuang, Zhan Huan, Peng Kun, et al. Multi-kW Yb-doped aluminophosphosilicate fiber[J]. Optical Materials Express, 2018, 8(8): 2114-2124. doi: 10.1364/OME.8.002114
[29]	Shao Chongyun, Ren Jinjun, Wang Fan, et al. Origin of radiation-induced darkening in Yb³⁺/Al³⁺/P⁵⁺-doped silica glasses: effect of the P/Al ratio[J]. The Journal of Physical Chemistry B, 2018, 122(10): 2809-2820. doi: 10.1021/acs.jpcb.7b12587